)]}' { "log": [ { "commit": "f786ecba4158880f8cdc0ebb93e7d78e6c125449", "tree": "0291e9079912f41ad2dd67ffd609a554e98b7850", "parents": [ "5dd17e08f333cde0fa11000792e33d8d39b5599f" ], "author": { "name": "Vladimir Zapolskiy", "email": "vzapolskiy@gmail.com", "time": "Wed Sep 21 09:26:44 2011 +0000" }, "committer": { "name": "David S. Miller", "email": "davem@davemloft.net", "time": "Wed Sep 28 13:41:50 2011 -0400" }, "message": "connector: add comm change event report to proc connector\n\nAdd an event to monitor comm value changes of tasks. Such an event\nbecomes vital, if someone desires to control threads of a process in\ndifferent manner.\n\nA natural characteristic of threads is its comm value, and helpfully\napplication developers have an opportunity to change it in runtime.\nReporting about such events via proc connector allows to fine-grain\nmonitoring and control potentials, for instance a process control daemon\nlistening to proc connector and following comm value policies can place\nspecific threads to assigned cgroup partitions.\n\nIt might be possible to achieve a pale partial one-shot likeness without\nthis update, if an application changes comm value of a thread generator\ntask beforehand, then a new thread is cloned, and after that proc\nconnector listener gets the fork event and reads new thread\u0027s comm value\nfrom procfs stat file, but this change visibly simplifies and extends the\nmatter.\n\nSigned-off-by: Vladimir Zapolskiy \u003cvzapolskiy@gmail.com\u003e\nAcked-by: Evgeniy Polyakov \u003czbr@ioremap.net\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@google.com\u003e\nSigned-off-by: David S. Miller \u003cdavem@davemloft.net\u003e\n" }, { "commit": "be27425dcc516fd08245b047ea57f83b8f6f0903", "tree": "0f7cfb258a663d99ebeedf8ed3b9637b266b021c", "parents": [ "caca9510ff4e5d842c0589110243d60927836222" ], "author": { "name": "Andi Kleen", "email": "ak@linux.intel.com", "time": "Fri Aug 19 16:15:10 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Aug 25 10:17:28 2011 -0700" }, "message": "Add a personality to report 2.6.x version numbers\n\nI ran into a couple of programs which broke with the new Linux 3.0\nversion. Some of those were binary only. I tried to use LD_PRELOAD to\nwork around it, but it was quite difficult and in one case impossible\nbecause of a mix of 32bit and 64bit executables.\n\nFor example, all kind of management software from HP doesnt work, unless\nwe pretend to run a 2.6 kernel.\n\n $ uname -a\n Linux svivoipvnx001 3.0.0-08107-g97cd98f #1062 SMP Fri Aug 12 18:11:45 CEST 2011 i686 i686 i386 GNU/Linux\n\n $ hpacucli ctrl all show\n\n Error: No controllers detected.\n\n $ rpm -qf /usr/sbin/hpacucli\n hpacucli-8.75-12.0\n\nAnother notable case is that Python now reports \"linux3\" from\nsys.platform(); which in turn can break things that were checking\nsys.platform() \u003d\u003d \"linux2\":\n\n https://bugzilla.mozilla.org/show_bug.cgi?id\u003d664564\n\nIt seems pretty clear to me though it\u0027s a bug in the apps that are using\n\u0027\u003d\u003d\u0027 instead of .startswith(), but this allows us to unbreak broken\nprograms.\n\nThis patch adds a UNAME26 personality that makes the kernel report a\n2.6.40+x version number instead. The x is the x in 3.x.\n\nI know this is somewhat ugly, but I didn\u0027t find a better workaround, and\ncompatibility to existing programs is important.\n\nSome programs also read /proc/sys/kernel/osrelease. This can be worked\naround in user space with mount --bind (and a mount namespace)\n\nTo use:\n\n wget ftp://ftp.kernel.org/pub/linux/kernel/people/ak/uname26/uname26.c\n gcc -o uname26 uname26.c\n ./uname26 program\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "72fa59970f8698023045ab0713d66f3f4f96945c", "tree": "ed9a5eaf8212270d464c6d4396ae5a568352a997", "parents": [ "1d229d54dbc26971142f61c3d271a68db236d178" ], "author": { "name": "Vasiliy Kulikov", "email": "segoon@openwall.com", "time": "Mon Aug 08 19:02:04 2011 +0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Aug 11 11:24:42 2011 -0700" }, "message": "move RLIMIT_NPROC check from set_user() to do_execve_common()\n\nThe patch http://lkml.org/lkml/2003/7/13/226 introduced an RLIMIT_NPROC\ncheck in set_user() to check for NPROC exceeding via setuid() and\nsimilar functions.\n\nBefore the check there was a possibility to greatly exceed the allowed\nnumber of processes by an unprivileged user if the program relied on\nrlimit only. But the check created new security threat: many poorly\nwritten programs simply don\u0027t check setuid() return code and believe it\ncannot fail if executed with root privileges. So, the check is removed\nin this patch because of too often privilege escalations related to\nbuggy programs.\n\nThe NPROC can still be enforced in the common code flow of daemons\nspawning user processes. Most of daemons do fork()+setuid()+execve().\nThe check introduced in execve() (1) enforces the same limit as in\nsetuid() and (2) doesn\u0027t create similar security issues.\n\nNeil Brown suggested to track what specific process has exceeded the\nlimit by setting PF_NPROC_EXCEEDED process flag. With the change only\nthis process would fail on execve(), and other processes\u0027 execve()\nbehaviour is not changed.\n\nSolar Designer suggested to re-check whether NPROC limit is still\nexceeded at the moment of execve(). If the process was sleeping for\ndays between set*uid() and execve(), and the NPROC counter step down\nunder the limit, the defered execve() failure because NPROC limit was\nexceeded days ago would be unexpected. If the limit is not exceeded\nanymore, we clear the flag on successful calls to execve() and fork().\n\nThe flag is also cleared on successful calls to set_user() as the limit\nwas exceeded for the previous user, not the current one.\n\nSimilar check was introduced in -ow patches (without the process flag).\n\nv3 - clear PF_NPROC_EXCEEDED on successful calls to set_user().\n\nReviewed-by: James Morris \u003cjmorris@namei.org\u003e\nSigned-off-by: Vasiliy Kulikov \u003csegoon@openwall.com\u003e\nAcked-by: NeilBrown \u003cneilb@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c5f41752fd37979dbaec61dc59c7ece0606ddf7e", "tree": "47827a7fd86cbe4ad657d640b01e8b76535e8813", "parents": [ "dcfe1421c916345b068f43749263b94270324500" ], "author": { "name": "Amerigo Wang", "email": "amwang@redhat.com", "time": "Mon Jul 25 17:13:10 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jul 25 20:57:14 2011 -0700" }, "message": "notifiers: sys: move reboot notifiers into reboot.h\n\nIt is not necessary to share the same notifier.h.\n\nThis patch already moves register_reboot_notifier() and\nunregister_reboot_notifier() from kernel/notifier.c to kernel/sys.c.\n\n[amwang@redhat.com: make allyesconfig succeed on ppc64]\nSigned-off-by: WANG Cong \u003camwang@redhat.com\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nSigned-off-by: WANG Cong \u003camwang@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "39ab05c8e0b519ff0a04a869f065746e6e8c3d95", "tree": "e73f0ba74c4ea7a80dff9b2dd9445a3a74190e28", "parents": [ "1477fcc290b3d5c2614bde98bf3b1154c538860d", "c42d2237143fcf35cff642cefe2bcf7786aae312" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 19 18:24:11 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 19 18:24:11 2011 -0700" }, "message": "Merge branch \u0027driver-core-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6\n\n* \u0027driver-core-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (44 commits)\n debugfs: Silence DEBUG_STRICT_USER_COPY_CHECKS\u003dy warning\n sysfs: remove \"last sysfs file:\" line from the oops messages\n drivers/base/memory.c: fix warning due to \"memory hotplug: Speed up add/remove when blocks are larger than PAGES_PER_SECTION\"\n memory hotplug: Speed up add/remove when blocks are larger than PAGES_PER_SECTION\n SYSFS: Fix erroneous comments for sysfs_update_group().\n driver core: remove the driver-model structures from the documentation\n driver core: Add the device driver-model structures to kerneldoc\n Translated Documentation/email-clients.txt\n RAW driver: Remove call to kobject_put().\n reboot: disable usermodehelper to prevent fs access\n efivars: prevent oops on unload when efi is not enabled\n Allow setting of number of raw devices as a module parameter\n Introduce CONFIG_GOOGLE_FIRMWARE\n driver: Google Memory Console\n driver: Google EFI SMI\n x86: Better comments for get_bios_ebda()\n x86: get_bios_ebda_length()\n misc: fix ti-st build issues\n params.c: Use new strtobool function to process boolean inputs\n debugfs: move to new strtobool\n ...\n\nFix up trivial conflicts in fs/debugfs/file.c due to the same patch\nbeing applied twice, and an unrelated cleanup nearby.\n" }, { "commit": "2e711c04dbbf7a7732a3f7073b1fc285d12b369d", "tree": "dbc06a3fff744144d7937a205a91fd8ce71585d4", "parents": [ "f5a592f7d74e38c5007876c731e6bf5580072e63" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Tue Apr 26 19:15:07 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed May 11 21:37:15 2011 +0200" }, "message": "PM: Remove sysdev suspend, resume and shutdown operations\n\nSince suspend, resume and shutdown operations in struct sysdev_class\nand struct sysdev_driver are not used any more, remove them. Also\ndrop sysdev_suspend(), sysdev_resume() and sysdev_shutdown() used\nfor executing those operations and modify all of their users\naccordingly. This reduces kernel code size quite a bit and reduces\nits complexity.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n" }, { "commit": "b50fa7c8077c625919b1e0a75fc37b825f024518", "tree": "c266234fe50b388b475b03a09a25908b508c2293", "parents": [ "aabb6e1531b0c78423dca6a39620892249fef7f9" ], "author": { "name": "Kay Sievers", "email": "kay.sievers@vrfy.org", "time": "Thu May 05 13:32:05 2011 +0200" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Fri May 06 17:52:32 2011 -0700" }, "message": "reboot: disable usermodehelper to prevent fs access\n\nIn case CONFIG_UEVENT_HELPER_PATH is not set to \"\", which it\nshould be on every system, the kernel forks processes during\nshutdown, which try to access the rootfs, even when the\nbinary does not exist. It causes exceptions and long delays in\nthe disk driver, which gets read requests at the time it tries\nto shut down the disk.\n\nThis patch disables all kernel-forked processes during reboot to\nallow a clean poweroff.\n\nCc: Tejun Heo \u003chtejun@gmail.com\u003e\nTested-By: Anton Guda \u003catu@dmeti.dp.ua\u003e\nSigned-off-by: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n" }, { "commit": "fc832ad3645f0507f24d11752544525a50a83c71", "tree": "d02dd477d94cdeaa42286dbeffcb60467fb30fb7", "parents": [ "3263245de48344ad7bdd0e7256bf1606d2592f88" ], "author": { "name": "Serge E. Hallyn", "email": "serge@hallyn.com", "time": "Wed Mar 23 16:43:22 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 23 19:47:06 2011 -0700" }, "message": "userns: user namespaces: convert all capable checks in kernel/sys.c\n\nThis allows setuid/setgid in containers. It also fixes some corner cases\nwhere kernel logic foregoes capability checks when uids are equivalent.\nThe latter will need to be done throughout the whole kernel.\n\nChangelog:\n\tJan 11: Use nsown_capable() as suggested by Bastian Blank.\n\tJan 11: Fix logic errors in uid checks pointed out by Bastian.\n\tFeb 15: allow prlimit to current (was regression in previous version)\n\tFeb 23: remove debugging printks, uninline set_one_prio_perm and\n\t\tmake it bool, and document its return value.\n\nSigned-off-by: Serge E. Hallyn \u003cserge.hallyn@canonical.com\u003e\nAcked-by: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nAcked-by: Daniel Lezcano \u003cdaniel.lezcano@free.fr\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bb96a6f50be27390dc959ff67d9ea0ea0cfbe177", "tree": "478253434235baeb1e4760a25c0a0f01293fbb8a", "parents": [ "3486740a4f32a6a466f5ac931654d154790ba648" ], "author": { "name": "Serge E. Hallyn", "email": "serge@hallyn.com", "time": "Wed Mar 23 16:43:18 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 23 19:47:03 2011 -0700" }, "message": "userns: allow sethostname in a container\n\nChangelog:\n\tFeb 23: let clone_uts_ns() handle setting uts-\u003euser_ns\n\t\tTo do so we need to pass in the task_struct who\u0027ll\n\t\tget the utsname, so we can get its user_ns.\n\tFeb 23: As per Oleg\u0027s coment, just pass in tsk, instead of two\n\t\tof its members.\n\nSigned-off-by: Serge E. Hallyn \u003cserge.hallyn@canonical.com\u003e\nAcked-by: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nAcked-by: Daniel Lezcano \u003cdaniel.lezcano@free.fr\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "40dc166cb5dddbd36aa4ad11c03915ea538f5a61", "tree": "0a778159cf89ddee9e7d3134ae40569bdccd2a24", "parents": [ "f9b9e806ae0ede772cbb9916d9ac7354a123d044" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Tue Mar 15 00:43:46 2011 +0100" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Tue Mar 15 00:43:46 2011 +0100" }, "message": "PM / Core: Introduce struct syscore_ops for core subsystems PM\n\nSome subsystems need to carry out suspend/resume and shutdown\noperations with one CPU on-line and interrupts disabled. The only\nway to register such operations is to define a sysdev class and\na sysdev specifically for this purpose which is cumbersome and\ninefficient. Moreover, the arguments taken by sysdev suspend,\nresume and shutdown callbacks are practically never necessary.\n\nFor this reason, introduce a simpler interface allowing subsystems\nto register operations to be executed very late during system suspend\nand shutdown and very early during resume in the form of\nstrcut syscore_ops objects.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n" }, { "commit": "aa5bd67dcfdf9af34c7fa36ebc87d4e1f7e91873", "tree": "95196496421cd8e7ad4c655becf2fa3309c88052", "parents": [ "2f215a7d6d1d8ed0bbdda4fc4f7d64e3a1d46acc" ], "author": { "name": "Kacper Kornet", "email": "kornet@camk.edu.pl", "time": "Sat Jan 29 00:21:04 2011 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jan 31 13:01:27 2011 +1000" }, "message": "Fix prlimit64 for suid/sgid processes\n\nSince check_prlimit_permission always fails in the case of SUID/GUID\nprocesses, such processes are not able to read or set their own limits.\nThis commit changes this by assuming that process can always read/change\nits own limits.\n\nSigned-off-by: Kacper Kornet \u003ckornet@camk.edu.pl\u003e\nAcked-by: Jiri Slaby \u003cjslaby@suse.cz\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "04c6862c055fb687c90d9652f32c11a063df15cf", "tree": "b381c4c2005118f05ce8d2f3d363b73807c0eddf", "parents": [ "fc2d557c74dc58294b9acc7231a2113ae59af97c" ], "author": { "name": "Seiji Aguchi", "email": "seiji.aguchi@hds.com", "time": "Wed Jan 12 16:59:30 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 08:03:07 2011 -0800" }, "message": "kmsg_dump: add kmsg_dump() calls to the reboot, halt, poweroff and emergency_restart paths\n\nWe need to know the reason why system rebooted in support service.\nHowever, we can\u0027t inform our customers of the reason because final\nmessages are lost on current Linux kernel.\n\nThis patch improves the situation above because the final messages are\nsaved by adding kmsg_dump() to reboot, halt, poweroff and\nemergency_restart path.\n\nSigned-off-by: Seiji Aguchi \u003cseiji.aguchi@hds.com\u003e\nCc: David Woodhouse \u003cdwmw2@infradead.org\u003e\nCc: Marco Stornelli \u003cmarco.stornelli@gmail.com\u003e\nReviewed-by: Artem Bityutskiy \u003cArtem.Bityutskiy@nokia.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5091faa449ee0b7d73bc296a93bca9540fc51d0a", "tree": "55f5e96e189af65c85c769fce48627b8a5abb86b", "parents": [ "822bc180a7f7a7bc5fcaaea195f41b487cc8cae8" ], "author": { "name": "Mike Galbraith", "email": "efault@gmx.de", "time": "Tue Nov 30 14:18:03 2010 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Nov 30 16:03:35 2010 +0100" }, "message": "sched: Add \u0027autogroup\u0027 scheduling feature: automated per session task groups\n\nA recurring complaint from CFS users is that parallel kbuild has\na negative impact on desktop interactivity. This patch\nimplements an idea from Linus, to automatically create task\ngroups. Currently, only per session autogroups are implemented,\nbut the patch leaves the way open for enhancement.\n\nImplementation: each task\u0027s signal struct contains an inherited\npointer to a refcounted autogroup struct containing a task group\npointer, the default for all tasks pointing to the\ninit_task_group. When a task calls setsid(), a new task group\nis created, the process is moved into the new task group, and a\nreference to the preveious task group is dropped. Child\nprocesses inherit this task group thereafter, and increase it\u0027s\nrefcount. When the last thread of a process exits, the\nprocess\u0027s reference is dropped, such that when the last process\nreferencing an autogroup exits, the autogroup is destroyed.\n\nAt runqueue selection time, IFF a task has no cgroup assignment,\nits current autogroup is used.\n\nAutogroup bandwidth is controllable via setting it\u0027s nice level\nthrough the proc filesystem:\n\n cat /proc/\u003cpid\u003e/autogroup\n\nDisplays the task\u0027s group and the group\u0027s nice level.\n\n echo \u003cnice level\u003e \u003e /proc/\u003cpid\u003e/autogroup\n\nSets the task group\u0027s shares to the weight of nice \u003clevel\u003e task.\nSetting nice level is rate limited for !admin users due to the\nabuse risk of task group locking.\n\nThe feature is enabled from boot by default if\nCONFIG_SCHED_AUTOGROUP\u003dy is selected, but can be disabled via\nthe boot option noautogroup, and can also be turned on/off on\nthe fly via:\n\n echo [01] \u003e /proc/sys/kernel/sched_autogroup_enabled\n\n... which will automatically move tasks to/from the root task group.\n\nSigned-off-by: Mike Galbraith \u003cefault@gmx.de\u003e\nAcked-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Markus Trippelsdorf \u003cmarkus@trippelsdorf.de\u003e\nCc: Mathieu Desnoyers \u003cmathieu.desnoyers@efficios.com\u003e\nCc: Paul Turner \u003cpjt@google.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n[ Removed the task_group_path() debug code, and fixed !EVENTFD build failure. ]\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nLKML-Reference: \u003c1290281700.28711.9.camel@maggy.simson.net\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "950eaaca681c44aab87a46225c9e44f902c080aa", "tree": "5f0290db3f84b7f2929ae53729d74a59dc5bb5e9", "parents": [ "6cb6cbeaa9d6573c674842b9471c0467967aae99" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Aug 31 17:00:18 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Aug 31 17:00:18 2010 -0700" }, "message": "pid: make setpgid() system call use RCU read-side critical section\n\n[ 23.584719]\n[ 23.584720] \u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n[ 23.585059] [ INFO: suspicious rcu_dereference_check() usage. ]\n[ 23.585176] ---------------------------------------------------\n[ 23.585176] kernel/pid.c:419 invoked rcu_dereference_check() without protection!\n[ 23.585176]\n[ 23.585176] other info that might help us debug this:\n[ 23.585176]\n[ 23.585176]\n[ 23.585176] rcu_scheduler_active \u003d 1, debug_locks \u003d 1\n[ 23.585176] 1 lock held by rc.sysinit/728:\n[ 23.585176] #0: (tasklist_lock){.+.+..}, at: [\u003cffffffff8104771f\u003e] sys_setpgid+0x5f/0x193\n[ 23.585176]\n[ 23.585176] stack backtrace:\n[ 23.585176] Pid: 728, comm: rc.sysinit Not tainted 2.6.36-rc2 #2\n[ 23.585176] Call Trace:\n[ 23.585176] [\u003cffffffff8105b436\u003e] lockdep_rcu_dereference+0x99/0xa2\n[ 23.585176] [\u003cffffffff8104c324\u003e] find_task_by_pid_ns+0x50/0x6a\n[ 23.585176] [\u003cffffffff8104c35b\u003e] find_task_by_vpid+0x1d/0x1f\n[ 23.585176] [\u003cffffffff81047727\u003e] sys_setpgid+0x67/0x193\n[ 23.585176] [\u003cffffffff810029eb\u003e] system_call_fastpath+0x16/0x1b\n[ 24.959669] type\u003d1400 audit(1282938522.956:4): avc: denied { module_request } for pid\u003d766 comm\u003d\"hwclock\" kmod\u003d\"char-major-10-135\" scontext\u003dsystem_u:system_r:hwclock_t:s0 tcontext\u003dsystem_u:system_r:kernel_t:s0 tclas\n\nIt turns out that the setpgid() system call fails to enter an RCU\nread-side critical section before doing a PID-to-task_struct translation.\nThis commit therefore does rcu_read_lock() before the translation, and\nalso does rcu_read_unlock() after the last use of the returned pointer.\n\nReported-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\n" }, { "commit": "c022a0acad534fd5f5d5f17280f6d4d135e74e81", "tree": "b67cb6f1dd5ca1625b3699577b781d8058a37e93", "parents": [ "b95183453af2ed14a5c7027e58049c9fd17e92ce" ], "author": { "name": "Jiri Slaby", "email": "jslaby@suse.cz", "time": "Tue May 04 18:03:50 2010 +0200" }, "committer": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Jul 16 09:48:48 2010 +0200" }, "message": "rlimits: implement prlimit64 syscall\n\nThis patch adds the code to support the sys_prlimit64 syscall which\nmodifies-and-returns the rlim values of a selected process atomically.\nThe first parameter, pid, being 0 means current process.\n\nUnlike the current implementation, it is a generic interface,\narchitecture indepentent so that we needn\u0027t handle compat stuff\nanymore. In the future, after glibc start to use this we can deprecate\nsys_setrlimit and sys_getrlimit in favor to clean up the code finally.\n\nIt also adds a possibility of changing limits of other processes. We\ncheck the user\u0027s permissions to do that and if it succeeds, the new\nlimits are propagated online. This is good for large scale\napplications such as SAP or databases where administrators need to\nchange limits time by time (e.g. on crashes increase core size). And\nit is unacceptable to restart the service.\n\nFor safety, all rlim users now either use accessors or doesn\u0027t need\nthem due to\n- locking\n- the fact a process was just forked and nobody else knows about it\n yet (and nobody can\u0027t thus read/write limits)\nhence it is safe to modify limits now.\n\nThe limitation is that we currently stay at ulong internal\nrepresentation. So the rlim64_is_infinity check is used where value is\ncompared against ULONG_MAX on 32-bit which is the maximum value there.\n\nAnd since internally the limits are held in struct rlimit, converters\nwhich are used before and after do_prlimit call in sys_prlimit64 are\nintroduced.\n\nSigned-off-by: Jiri Slaby \u003cjslaby@suse.cz\u003e\n" }, { "commit": "b95183453af2ed14a5c7027e58049c9fd17e92ce", "tree": "8db2687b9508de182615915c7df1edf26d08638c", "parents": [ "5b41535aac0c07135ff6a4c5c2ae115d1c20c0bc" ], "author": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Tue May 04 11:28:25 2010 +0200" }, "committer": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Jul 16 09:48:48 2010 +0200" }, "message": "rlimits: switch more rlimit syscalls to do_prlimit\n\nAfter we added more generic do_prlimit, switch sys_getrlimit to that.\nAlso switch compat handling, so we can get rid of ugly __user casts\nand avoid setting process\u0027 address limit to kernel data and back.\n\nSigned-off-by: Jiri Slaby \u003cjslaby@suse.cz\u003e\n" }, { "commit": "5b41535aac0c07135ff6a4c5c2ae115d1c20c0bc", "tree": "f8db7ec9e07d33aa2af061b49895a0baebafd4cc", "parents": [ "6a1d5e2c85d06da35cdfd93f1a27675bfdc3ad8c" ], "author": { "name": "Jiri Slaby", "email": "jslaby@suse.cz", "time": "Wed Mar 24 16:11:29 2010 +0100" }, "committer": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Jul 16 09:48:48 2010 +0200" }, "message": "rlimits: redo do_setrlimit to more generic do_prlimit\n\nIt now allows also reading of limits. I.e. all read and writes will\nlater use this function.\n\nIt takes two parameters, new and old limits which can be both NULL.\nIf new is non-NULL, the value in it is set to rlimits.\nIf old is non-NULL, current rlimits are stored there.\nIf both are non-NULL, old are stored prior to setting the new ones,\natomically.\n(Similar to sigaction.)\n\nSigned-off-by: Jiri Slaby \u003cjslaby@suse.cz\u003e\n" }, { "commit": "86f162f4c75ceb6daf43165469eeeca1bc3d4639", "tree": "bca0e9d28d636fbaefb1846bdb85d9b57708df11", "parents": [ "1c1e618ddd15f69fd87ccea596769f78c8065504" ], "author": { "name": "Jiri Slaby", "email": "jslaby@suse.cz", "time": "Sat Nov 14 17:37:04 2009 +0100" }, "committer": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Jul 16 09:48:47 2010 +0200" }, "message": "rlimits: do security check under task_lock\n\nDo security_task_setrlimit under task_lock. Other tasks may change\nlimits under our hands while we are checking limits inside the\nfunction. From now on, they can\u0027t.\n\nNote that all the security work is done under a spinlock here now.\nSecurity hooks count with that, they are called from interrupt context\n(like security_task_kill) and with spinlocks already held (e.g.\ncapable-\u003esecurity_capable).\n\nSigned-off-by: Jiri Slaby \u003cjslaby@suse.cz\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\n" }, { "commit": "1c1e618ddd15f69fd87ccea596769f78c8065504", "tree": "f6b72aa3e0f1d02728d98810afc1644a1d6f5b8c", "parents": [ "7855c35da7ba16b389d17710401c4a55a3ea2102" ], "author": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Aug 28 14:08:17 2009 +0200" }, "committer": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Jul 16 09:48:47 2010 +0200" }, "message": "rlimits: allow setrlimit to non-current tasks\n\nAdd locking to allow setrlimit accept task parameter other than\ncurrent.\n\nNamely, lock tasklist_lock for read and check whether the task\nstructure has sighand non-null. Do all the signal processing under\nthat lock still held.\n\nThere are some points:\n1) security_task_setrlimit is now called with that lock held. This is\n not new, many security_* functions are called with this lock held\n already so it doesn\u0027t harm (all this security_* stuff does almost\n the same).\n2) task-\u003esighand-\u003esiglock (in update_rlimit_cpu) is nested in\n tasklist_lock. This dependence is already existing.\n3) tsk-\u003ealloc_lock is nested in tasklist_lock. This is OK too, already\n existing dependence.\n\nSigned-off-by: Jiri Slaby \u003cjirislaby@gmail.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "7855c35da7ba16b389d17710401c4a55a3ea2102", "tree": "c8092ed1fee23f044f9ac622a7263591901b6b35", "parents": [ "eb2d55a32b9a91bca0dea299eedb560bafa8b14e" ], "author": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Wed Aug 26 23:45:34 2009 +0200" }, "committer": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Jul 16 09:48:46 2010 +0200" }, "message": "rlimits: split sys_setrlimit\n\nCreate do_setrlimit from sys_setrlimit and declare do_setrlimit\nin the resource header. This is the first phase to have generic\ndo_prlimit which allows to be called from read, write and compat\nrlimits code.\n\nThe new do_setrlimit also accepts a task pointer to change the limits\nof. Currently, it cannot be other than current, but this will change\nwith locking later.\n\nAlso pass tsk-\u003egroup_leader to security_task_setrlimit to check\nwhether current is allowed to change rlimits of the process and not\nits arbitrary thread because it makes more sense given that rlimit are\nper process and not per-thread.\n\nSigned-off-by: Jiri Slaby \u003cjslaby@suse.cz\u003e\n" }, { "commit": "2fb9d2689a0041b88b25bc3187eada2968e25995", "tree": "28c25b5092a209cd55d5d3f29dea827bdde70abe", "parents": [ "5ab46b345e418747b3a52f0892680c0745c4223c" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Sep 03 19:21:45 2009 +0200" }, "committer": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Jul 16 09:48:46 2010 +0200" }, "message": "rlimits: make sure -\u003erlim_max never grows in sys_setrlimit\n\nMostly preparation for Jiri\u0027s changes, but probably makes sense anyway.\n\nsys_setrlimit() checks new_rlim.rlim_max \u003c\u003d old_rlim-\u003erlim_max, but when\nit takes task_lock() old_rlim-\u003erlim_max can be already lowered. Move this\ncheck under task_lock().\n\nCurrently this is not important, we can only race with our sub-thread,\nthis means the application is stupid. But when we change the code to allow\nthe update of !current task\u0027s limits, it becomes important to make sure\n-\u003erlim_max can be lowered \"reliably\" even if we race with the application\ndoing sys_setrlimit().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Jiri Slaby \u003cjslaby@suse.cz\u003e\n" }, { "commit": "5ab46b345e418747b3a52f0892680c0745c4223c", "tree": "d7453221b7fc2764a7405b48b73b4ac7bf7a317a", "parents": [ "8fd00b4d7014b00448eb33cf0590815304769798" ], "author": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Aug 28 14:05:12 2009 +0200" }, "committer": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Jul 16 09:48:45 2010 +0200" }, "message": "rlimits: add task_struct to update_rlimit_cpu\n\nAdd task_struct as a parameter to update_rlimit_cpu to be able to set\nrlimit_cpu of different task than current.\n\nSigned-off-by: Jiri Slaby \u003cjirislaby@gmail.com\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "8fd00b4d7014b00448eb33cf0590815304769798", "tree": "f97cc5b4401dd038e539dae7ad66066383012866", "parents": [ "2f7989efd4398d92b8adffce2e07dd043a0895fe" ], "author": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Wed Aug 26 18:41:16 2009 +0200" }, "committer": { "name": "Jiri Slaby", "email": "jirislaby@gmail.com", "time": "Fri Jul 16 09:48:45 2010 +0200" }, "message": "rlimits: security, add task_struct to setrlimit\n\nAdd task_struct to task_setrlimit of security_operations to be able to set\nrlimit of task other than current.\n\nSigned-off-by: Jiri Slaby \u003cjirislaby@gmail.com\u003e\nAcked-by: Eric Paris \u003ceparis@redhat.com\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "a06a4dc3a08201ff6a8a958f935b3cbf7744115f", "tree": "b338edde5edb31f51e0b7eb86e6c4ce8063c703f", "parents": [ "065add3941bdca54fe04ed3471a96bce9af88793" ], "author": { "name": "Neil Horman", "email": "nhorman@tuxdriver.com", "time": "Wed May 26 14:42:58 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 27 09:12:44 2010 -0700" }, "message": "kmod: add init function to usermodehelper\n\nAbout 6 months ago, I made a set of changes to how the core-dump-to-a-pipe\nfeature in the kernel works. We had reports of several races, including\nsome reports of apps bypassing our recursion check so that a process that\nwas forked as part of a core_pattern setup could infinitely crash and\nrefork until the system crashed.\n\nWe fixed those by improving our recursion checks. The new check basically\nrefuses to fork a process if its core limit is zero, which works well.\n\nUnfortunately, I\u0027ve been getting grief from maintainer of user space\nprograms that are inserted as the forked process of core_pattern. They\ncontend that in order for their programs (such as abrt and apport) to\nwork, all the running processes in a system must have their core limits\nset to a non-zero value, to which I say \u0027yes\u0027. I did this by design, and\nthink thats the right way to do things.\n\nBut I\u0027ve been asked to ease this burden on user space enough times that I\nthought I would take a look at it. The first suggestion was to make the\nrecursion check fail on a non-zero \u0027special\u0027 number, like one. That way\nthe core collector process could set its core size ulimit to 1, and enable\nthe kernel\u0027s recursion detection. This isn\u0027t a bad idea on the surface,\nbut I don\u0027t like it since its opt-in, in that if a program like abrt or\napport has a bug and fails to set such a core limit, we\u0027re left with a\nrecursively crashing system again.\n\nSo I\u0027ve come up with this. What I\u0027ve done is modify the\ncall_usermodehelper api such that an extra parameter is added, a function\npointer which will be called by the user helper task, after it forks, but\nbefore it exec\u0027s the required process. This will give the caller the\nopportunity to get a call back in the processes context, allowing it to do\nwhatever it needs to to the process in the kernel prior to exec-ing the\nuser space code. In the case of do_coredump, this callback is ues to set\nthe core ulimit of the helper process to 1. This elimnates the opt-in\nproblem that I had above, as it allows the ulimit for core sizes to be set\nto the value of 1, which is what the recursion check looks for in\ndo_coredump.\n\nThis patch:\n\nCreate new function call_usermodehelper_fns() and allow it to assign both\nan init and cleanup function, as we\u0027ll as arbitrary data.\n\nThe init function is called from the context of the forked process and\nallows for customization of the helper process prior to calling exec. Its\nreturn code gates the continuation of the process, or causes its exit.\nAlso add an arbitrary data pointer to the subprocess_info struct allowing\nfor data to be passed from the caller to the new process, and the\nsubsequent cleanup process\n\nAlso, use this patch to cleanup the cleanup function. It currently takes\nan argp and envp pointer for freeing, which is ugly. Lets instead just\nmake the subprocess_info structure public, and pass that to the cleanup\nand init routines\n\nSigned-off-by: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nReviewed-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0ffbe2699cda6afbe08501098dff8a8c2fe6ae09", "tree": "81b1a2305d16c873371b65c5a863c0268036cefe", "parents": [ "4e5d6f7ec3833c0da9cf34fa5c53c6058c5908b6", "7ebd467551ed6ae200d7835a84bbda0dcadaa511" ], "author": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Thu May 06 10:56:07 2010 +1000" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Thu May 06 10:56:07 2010 +1000" }, "message": "Merge branch \u0027master\u0027 into next\n" }, { "commit": "46da27664887fb95cedba53eafcf876de812c8c1", "tree": "5a2ee7566cacfeaef874a3306922c40b5d897294", "parents": [ "fb2162df74bb19552db3d988fd11c787cf5fad56" ], "author": { "name": "Andreas Schwab", "email": "schwab@linux-m68k.org", "time": "Fri Apr 23 13:17:44 2010 -0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Apr 24 11:31:24 2010 -0700" }, "message": "kernel/sys.c: fix compat uname machine\n\nOn ppc64 you get this error:\n\n $ setarch ppc -R true\n setarch: ppc: Unrecognized architecture\n\nbecause uname still reports ppc64 as the machine.\n\nSo mask off the personality flags when checking for PER_LINUX32.\n\nSigned-off-by: Andreas Schwab \u003cschwab@linux-m68k.org\u003e\nReviewed-by: Christoph Hellwig \u003chch@lst.de\u003e\nAcked-by: David S. Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "06ad187e280e725e356c62c3a30ddcd01564f8be", "tree": "5406ae3382d62971ed8b981533075657aa18d16b", "parents": [ "43ed8c3b4573d5f5cd314937fee63b4ab046ac5f" ], "author": { "name": "Eric Paris", "email": "eparis@redhat.com", "time": "Wed Apr 07 15:15:08 2010 -0400" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Mon Apr 12 12:19:17 2010 +1000" }, "message": "security: remove dead hook task_setgid\n\nUnused hook. Remove.\n\nSigned-off-by: Eric Paris \u003ceparis@redhat.com\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "43ed8c3b4573d5f5cd314937fee63b4ab046ac5f", "tree": "bb3f094daa6f0c3f49c4c47fb5ac1c80a26e9698", "parents": [ "0968d0060a3c885e53d453380266c7792a55d302" ], "author": { "name": "Eric Paris", "email": "eparis@redhat.com", "time": "Wed Apr 07 15:15:02 2010 -0400" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Mon Apr 12 12:19:16 2010 +1000" }, "message": "security: remove dead hook task_setuid\n\nUnused hook. Remove.\n\nSigned-off-by: Eric Paris \u003ceparis@redhat.com\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "5a0e3ad6af8660be21ca98a971cd00f331318c05", "tree": "5bfb7be11a03176a87296a43ac6647975c00a1d1", "parents": [ "ed391f4ebf8f701d3566423ce8f17e614cde9806" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Wed Mar 24 17:04:11 2010 +0900" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Mar 30 22:02:32 2010 +0900" }, "message": "include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h\n\npercpu.h is included by sched.h and module.h and thus ends up being\nincluded when building most .c files. percpu.h includes slab.h which\nin turn includes gfp.h making everything defined by the two files\nuniversally available and complicating inclusion dependencies.\n\npercpu.h -\u003e slab.h dependency is about to be removed. Prepare for\nthis change by updating users of gfp and slab facilities include those\nheaders directly instead of assuming availability. As this conversion\nneeds to touch large number of source files, the following script is\nused as the basis of conversion.\n\n http://userweb.kernel.org/~tj/misc/slabh-sweep.py\n\nThe script does the followings.\n\n* Scan files for gfp and slab usages and update includes such that\n only the necessary includes are there. ie. if only gfp is used,\n gfp.h, if slab is used, slab.h.\n\n* When the script inserts a new include, it looks at the include\n blocks and try to put the new include such that its order conforms\n to its surrounding. It\u0027s put in the include block which contains\n core kernel includes, in the same order that the rest are ordered -\n alphabetical, Christmas tree, rev-Xmas-tree or at the end if there\n doesn\u0027t seem to be any matching order.\n\n* If the script can\u0027t find a place to put a new include (mostly\n because the file doesn\u0027t have fitting include block), it prints out\n an error message indicating which .h file needs to be added to the\n file.\n\nThe conversion was done in the following steps.\n\n1. The initial automatic conversion of all .c files updated slightly\n over 4000 files, deleting around 700 includes and adding ~480 gfp.h\n and ~3000 slab.h inclusions. The script emitted errors for ~400\n files.\n\n2. Each error was manually checked. Some didn\u0027t need the inclusion,\n some needed manual addition while adding it to implementation .h or\n embedding .c file was more appropriate for others. This step added\n inclusions to around 150 files.\n\n3. The script was run again and the output was compared to the edits\n from #2 to make sure no file was left behind.\n\n4. Several build tests were done and a couple of problems were fixed.\n e.g. lib/decompress_*.c used malloc/free() wrappers around slab\n APIs requiring slab.h to be added manually.\n\n5. The script was run on all .h files but without automatically\n editing them as sprinkling gfp.h and slab.h inclusions around .h\n files could easily lead to inclusion dependency hell. Most gfp.h\n inclusion directives were ignored as stuff from gfp.h was usually\n wildly available and often used in preprocessor macros. Each\n slab.h inclusion directive was examined and added manually as\n necessary.\n\n6. percpu.h was updated not to include slab.h.\n\n7. Build test were done on the following configurations and failures\n were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my\n distributed build env didn\u0027t work with gcov compiles) and a few\n more options had to be turned off depending on archs to make things\n build (like ipr on powerpc/64 which failed due to missing writeq).\n\n * x86 and x86_64 UP and SMP allmodconfig and a custom test config.\n * powerpc and powerpc64 SMP allmodconfig\n * sparc and sparc64 SMP allmodconfig\n * ia64 SMP allmodconfig\n * s390 SMP allmodconfig\n * alpha SMP allmodconfig\n * um on x86_64 SMP allmodconfig\n\n8. percpu.h modifications were reverted so that it could be applied as\n a separate patch and serve as bisection point.\n\nGiven the fact that I had only a couple of failures from tests on step\n6, I\u0027m fairly confident about the coverage of this conversion patch.\nIf there is a breakage, it\u0027s likely to be something in one of the arch\nheaders which should be easily discoverable easily on most builds of\nthe specific arch.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nGuess-its-ok-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\n" }, { "commit": "5cacdb4add1b1e50fe75edc50ebbb7bddd9cf5e7", "tree": "bd6595bb8c5c7e20ad01ed7ef766d873e5d26db3", "parents": [ "e28cbf22933d0c0ccaf3c4c27a1a263b41f73859" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Wed Mar 10 15:21:21 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Mar 12 15:52:32 2010 -0800" }, "message": "Add generic sys_olduname()\n\nAdd generic implementations of the old and really old uname system calls.\nNote that sh only implements sys_olduname but not sys_oldolduname, but I\u0027m\nnot going to bother with another ifdef for that special case.\n\nm32r implemented an old uname but never wired it up, so kill it, too.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Jeff Dike \u003cjdike@addtoit.com\u003e\nCc: Hirokazu Takata \u003ctakata@linux-m32r.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: H. Peter Anvin \u003chpa@zytor.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Andreas Schwab \u003cschwab@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e28cbf22933d0c0ccaf3c4c27a1a263b41f73859", "tree": "a93ff48cfd97766a23b2c4f3ea86fccfc9c51d3f", "parents": [ "baed7fc9b580bd3fb8252ff1d9b36eaf1f86b670" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Wed Mar 10 15:21:19 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Mar 12 15:52:32 2010 -0800" }, "message": "improve sys_newuname() for compat architectures\n\nOn an architecture that supports 32-bit compat we need to override the\nreported machine in uname with the 32-bit value. Instead of doing this\nseparately in every architecture introduce a COMPAT_UTS_MACHINE define in\n\u003casm/compat.h\u003e and apply it directly in sys_newuname().\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Jeff Dike \u003cjdike@addtoit.com\u003e\nCc: Hirokazu Takata \u003ctakata@linux-m32r.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: H. Peter Anvin \u003chpa@zytor.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Andreas Schwab \u003cschwab@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "78d7d407b62a021e6d2e8dc24c0b90e390ab58a1", "tree": "8c1074b84db4b977bad6802a3701e0113c0a7739", "parents": [ "d4bb527438b4181cd3c564ae04dd344c381283a1" ], "author": { "name": "Jiri Slaby", "email": "jslaby@suse.cz", "time": "Fri Mar 05 13:42:54 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Mar 06 11:26:33 2010 -0800" }, "message": "kernel core: use helpers for rlimits\n\nMake sure compiler won\u0027t do weird things with limits. E.g. fetching them\ntwice may return 2 different values after writable limits are implemented.\n\nI.e. either use rlimit helpers added in commit 3e10e716abf3 (\"resource:\nadd helpers for fetching rlimits\") or ACCESS_ONCE if not applicable.\n\nSigned-off-by: Jiri Slaby \u003cjslaby@suse.cz\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: john stultz \u003cjohnstul@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f66ffdedbf0fc059a92219bb08c1dbcac88f074b", "tree": "9db4ad51764455123130e82fb7acf4f0a0be58ce", "parents": [ "2531216f236cb2a1f39ffa12a4a9339541e52191", "dd5feea14a7de4edbd9f36db1a2db785de91b88d" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Feb 28 10:31:01 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Feb 28 10:31:01 2010 -0800" }, "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (25 commits)\n sched: Fix SCHED_MC regression caused by change in sched cpu_power\n sched: Don\u0027t use possibly stale sched_class\n kthread, sched: Remove reference to kthread_create_on_cpu\n sched: cpuacct: Use bigger percpu counter batch values for stats counters\n percpu_counter: Make __percpu_counter_add an inline function on UP\n sched: Remove member rt_se from struct rt_rq\n sched: Change usage of rt_rq-\u003ert_se to rt_rq-\u003etg-\u003ert_se[cpu]\n sched: Remove unused update_shares_locked()\n sched: Use for_each_bit\n sched: Queue a deboosted task to the head of the RT prio queue\n sched: Implement head queueing for sched_rt\n sched: Extend enqueue_task to allow head queueing\n sched: Remove USER_SCHED\n sched: Fix the place where group powers are updated\n sched: Assume *balance is valid\n sched: Remove load_balance_newidle()\n sched: Unify load_balance{,_newidle}()\n sched: Add a lock break for PREEMPT\u003dy\n sched: Remove from fwd decls\n sched: Remove rq_iterator from move_one_task\n ...\n\nFix up trivial conflicts in kernel/sched.c\n" }, { "commit": "701188374b6f1ef9cf7e4dce4a2e69ef4c0012ac", "tree": "f716e33bde324c74553a8d0b2acfb70d8ca3f1cc", "parents": [ "5a2d41961dd6815b874b5c0afec0ac96cd90eea4" ], "author": { "name": "Tetsuo Handa", "email": "penguin-kernel@I-love.SAKURA.ne.jp", "time": "Mon Feb 22 12:44:16 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Feb 22 19:50:34 2010 -0800" }, "message": "kernel/sys.c: fix missing rcu protection for sys_getpriority()\n\nfind_task_by_vpid() is not safe without rcu_read_lock(). 2.6.33-rc7 got\nRCU protection for sys_setpriority() but missed it for sys_getpriority().\n\nSigned-off-by: Tetsuo Handa \u003cpenguin-kernel@I-love.SAKURA.ne.jp\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nAcked-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7c9414385ebfdd87cc542d4e7e3bb0dbb2d3ce25", "tree": "beb51d7d0d543d72e2754cff807df5c399f2d376", "parents": [ "871e35bc9733f273eaf5ceb69bbd0423b58e5285" ], "author": { "name": "Dhaval Giani", "email": "dhaval.giani@gmail.com", "time": "Wed Jan 20 13:26:18 2010 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Jan 21 13:40:18 2010 +0100" }, "message": "sched: Remove USER_SCHED\n\nRemove the USER_SCHED feature. It has been scheduled to be removed in\n2.6.34 as per http://marc.info/?l\u003dlinux-kernel\u0026m\u003d125728479022976\u0026w\u003d2\n\nSigned-off-by: Dhaval Giani \u003cdhaval.giani@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1263990378.24844.3.camel@localhost\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "10e5453ffa0d04a2eda3cda3f55b88cb9c04595f", "tree": "def247dc399549bc1359fe9d1faa49c621f8890d", "parents": [ "3cd312c3e887b4bee2d94668a481b3d19c07732c", "d4581a239a40319205762b76c01eb6363f277efa" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Dec 19 09:47:34 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Dec 19 09:47:34 2009 -0800" }, "message": "Merge branch \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n sys: Fix missing rcu protection for __task_cred() access\n signals: Fix more rcu assumptions\n signal: Fix racy access to __task_cred in kill_pid_info_as_uid()\n" }, { "commit": "dfc6a736d452a8c308190b618b065c2257d370ff", "tree": "129800fa31f88a5f6d520a2c0d0a64273488a3fa", "parents": [ "948c1e2521979c332b21b623414cf258150f214e" ], "author": { "name": "H Hartley Sweeten", "email": "hartleys@visionengravers.com", "time": "Mon Dec 14 18:00:22 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Dec 15 08:53:26 2009 -0800" }, "message": "kernel/sys.c: fix \"warning: do-while statement is not a compound statement\" noise\n\ndo_each_thread/while_each_thread wrap a block of code that is in this format:\n\n\tfor (...)\n\t\tdo\n\t\t\t...\n\t\twhile\n\nIf curly braces do not surround the inner loop the following warning is\ngenerated by sparse:\n\n\twarning: do-while statement is not a compound statement\n\nFix the warning by adding the braces.\n\nSigned-off-by: H Hartley Sweeten \u003chsweeten@visionengravers.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d4581a239a40319205762b76c01eb6363f277efa", "tree": "d05b5f7103c9585e8485b581dc90f5a4ed9d18e3", "parents": [ "7cf7db8df0b78076eafa4ead47559344ca7b7a43" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Thu Dec 10 00:52:51 2009 +0000" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Thu Dec 10 23:04:11 2009 +0100" }, "message": "sys: Fix missing rcu protection for __task_cred() access\n\ncommit c69e8d9 (CRED: Use RCU to access another task\u0027s creds and to\nrelease a task\u0027s own creds) added non rcu_read_lock() protected access\nto task creds of the target task in set_prio_one().\n\nThe comment above the function says:\n * - the caller must hold the RCU read lock\n\nThe calling code in sys_setpriority does read_lock(\u0026tasklist_lock) but\nnot rcu_read_lock(). This works only when CONFIG_TREE_PREEMPT_RCU\u003dn.\nWith CONFIG_TREE_PREEMPT_RCU\u003dy the rcu_callbacks can run in the tick\ninterrupt when they see no read side critical section.\n\nThere is another instance of __task_cred() in sys_setpriority() itself\nwhich is equally unprotected.\n\nWrap the whole code section into a rcu read side critical section to\nfix this quick and dirty.\n\nWill be revisited in course of the read_lock(\u0026tasklist_lock) -\u003e rcu\ncrusade.\n\nOleg noted further:\n\nThis also fixes another bug here. find_task_by_vpid() is not safe\nwithout rcu_read_lock(). I do not mean it is not safe to use the\nresult, just find_pid_ns() by itself is not safe.\n\nUsually tasklist gives enough protection, but if copy_process() fails\nit calls free_pid() lockless and does call_rcu(delayed_put_pid().\nThis means, without rcu lock find_pid_ns() can\u0027t scan the hash table\nsafely.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nLKML-Reference: \u003c20091210004703.029784964@linutronix.de\u003e\nAcked-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n\n" }, { "commit": "3b8ecd22447c4266500c0bcf97f035310543e494", "tree": "af4c86fd8d250d4978ad6b6905c30dafb3a552c6", "parents": [ "a9280fed383082da08a40af3f38daccaed6d8d62", "6f15fa50087c8317e353145319466afbeb27a75d" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Dec 09 08:07:17 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Dec 09 08:07:17 2009 -0800" }, "message": "Merge branch \u0027bkl-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027bkl-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n sys: Remove BKL from sys_reboot\n pm_qos: clean up racy global \"name\" variable\n pm_qos: remove BKL\n" }, { "commit": "0cf55e1ec08bb5a22e068309e2d8ba1180ab4239", "tree": "6102662a9594d51155bee11666fe8517fcbe6039", "parents": [ "d99ca3b977fc5a93141304f571475c2af9e6c1c5" ], "author": { "name": "Hidetoshi Seto", "email": "seto.hidetoshi@jp.fujitsu.com", "time": "Wed Dec 02 17:28:07 2009 +0900" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Dec 02 17:32:40 2009 +0100" }, "message": "sched, cputime: Introduce thread_group_times()\n\nThis is a real fix for problem of utime/stime values decreasing\ndescribed in the thread:\n\n http://lkml.org/lkml/2009/11/3/522\n\nNow cputime is accounted in the following way:\n\n - {u,s}time in task_struct are increased every time when the thread\n is interrupted by a tick (timer interrupt).\n\n - When a thread exits, its {u,s}time are added to signal-\u003e{u,s}time,\n after adjusted by task_times().\n\n - When all threads in a thread_group exits, accumulated {u,s}time\n (and also c{u,s}time) in signal struct are added to c{u,s}time\n in signal struct of the group\u0027s parent.\n\nSo {u,s}time in task struct are \"raw\" tick count, while\n{u,s}time and c{u,s}time in signal struct are \"adjusted\" values.\n\nAnd accounted values are used by:\n\n - task_times(), to get cputime of a thread:\n This function returns adjusted values that originates from raw\n {u,s}time and scaled by sum_exec_runtime that accounted by CFS.\n\n - thread_group_cputime(), to get cputime of a thread group:\n This function returns sum of all {u,s}time of living threads in\n the group, plus {u,s}time in the signal struct that is sum of\n adjusted cputimes of all exited threads belonged to the group.\n\nThe problem is the return value of thread_group_cputime(),\nbecause it is mixed sum of \"raw\" value and \"adjusted\" value:\n\n group\u0027s {u,s}time \u003d foreach(thread){{u,s}time} + exited({u,s}time)\n\nThis misbehavior can break {u,s}time monotonicity.\nAssume that if there is a thread that have raw values greater\nthan adjusted values (e.g. interrupted by 1000Hz ticks 50 times\nbut only runs 45ms) and if it exits, cputime will decrease (e.g.\n-5ms).\n\nTo fix this, we could do:\n\n group\u0027s {u,s}time \u003d foreach(t){task_times(t)} + exited({u,s}time)\n\nBut task_times() contains hard divisions, so applying it for\nevery thread should be avoided.\n\nThis patch fixes the above problem in the following way:\n\n - Modify thread\u0027s exit (\u003d __exit_signal()) not to use task_times().\n It means {u,s}time in signal struct accumulates raw values instead\n of adjusted values. As the result it makes thread_group_cputime()\n to return pure sum of \"raw\" values.\n\n - Introduce a new function thread_group_times(*task, *utime, *stime)\n that converts \"raw\" values of thread_group_cputime() to \"adjusted\"\n values, in same calculation procedure as task_times().\n\n - Modify group\u0027s exit (\u003d wait_task_zombie()) to use this introduced\n thread_group_times(). It make c{u,s}time in signal struct to\n have adjusted values like before this patch.\n\n - Replace some thread_group_cputime() by thread_group_times().\n This replacements are only applied where conveys the \"adjusted\"\n cputime to users, and where already uses task_times() near by it.\n (i.e. sys_times(), getrusage(), and /proc/\u003cPID\u003e/stat.)\n\nThis patch have a positive side effect:\n\n - Before this patch, if a group contains many short-life threads\n (e.g. runs 0.9ms and not interrupted by ticks), the group\u0027s\n cputime could be invisible since thread\u0027s cputime was accumulated\n after adjusted: imagine adjustment function as adj(ticks, runtime),\n {adj(0, 0.9) + adj(0, 0.9) + ....} \u003d {0 + 0 + ....} \u003d 0.\n After this patch it will not happen because the adjustment is\n applied after accumulated.\n\nv2:\n - remove if()s, put new variables into signal_struct.\n\nSigned-off-by: Hidetoshi Seto \u003cseto.hidetoshi@jp.fujitsu.com\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Spencer Candland \u003cspencer@bluehost.com\u003e\nCc: Americo Wang \u003cxiyou.wangcong@gmail.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Stanislaw Gruszka \u003csgruszka@redhat.com\u003e\nLKML-Reference: \u003c4B162517.8040909@jp.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "d180c5bccec02612256fd8076ff3c1fac3429553", "tree": "1ef4a45c81531645640380965916c68bbe7f6abb", "parents": [ "16bc67edeb49b531940b2ba6c183780a1b5c472d" ], "author": { "name": "Hidetoshi Seto", "email": "seto.hidetoshi@jp.fujitsu.com", "time": "Thu Nov 26 14:48:30 2009 +0900" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Nov 26 12:59:19 2009 +0100" }, "message": "sched: Introduce task_times() to replace task_{u,s}time() pair\n\nFunctions task_{u,s}time() are called in pair in almost all\ncases. However task_stime() is implemented to call task_utime()\nfrom its inside, so such paired calls run task_utime() twice.\n\nIt means we do heavy divisions (div_u64 + do_div) twice to get\nutime and stime which can be obtained at same time by one set\nof divisions.\n\nThis patch introduces a function task_times(*tsk, *utime,\n*stime) to retrieve utime and stime at once in better, optimized\nway.\n\nSigned-off-by: Hidetoshi Seto \u003cseto.hidetoshi@jp.fujitsu.com\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Stanislaw Gruszka \u003csgruszka@redhat.com\u003e\nCc: Spencer Candland \u003cspencer@bluehost.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Americo Wang \u003cxiyou.wangcong@gmail.com\u003e\nLKML-Reference: \u003c4B0E16AE.906@jp.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "3242f9804ba992c867360e2b57efc268b8e4e175", "tree": "96fbdbc1344aa67588ce26765f308c674b91a75f", "parents": [ "23756692147c5dfd3328afd42e16e9d943ff756c", "7456b0405d8fc063c49628f969cdb23be060fc80" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 29 08:20:00 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 29 08:20:00 2009 -0700" }, "message": "Merge branch \u0027hwpoison-2.6.32\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6\n\n* \u0027hwpoison-2.6.32\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6:\n HWPOISON: fix invalid page count in printk output\n HWPOISON: Allow schedule_on_each_cpu() from keventd\n HWPOISON: fix/proc/meminfo alignment\n HWPOISON: fix oops on ksm pages\n HWPOISON: Fix page count leak in hwpoison late kill in do_swap_page\n HWPOISON: return early on non-LRU pages\n HWPOISON: Add brief hwpoison description to Documentation\n HWPOISON: Clean up PR_MCE_KILL interface\n" }, { "commit": "0d0df599f1f11f12d589318bacb59a50fb5c0310", "tree": "084ab3d1562502ad6a056aa3fd8dd748683c8c2f", "parents": [ "370c28def65b3a5765192753a164403619b41d01" ], "author": { "name": "Christian Borntraeger", "email": "borntraeger@de.ibm.com", "time": "Mon Oct 26 16:49:34 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 29 07:39:25 2009 -0700" }, "message": "connector: fix regression introduced by sid connector\n\nSince commit 02b51df1b07b4e9ca823c89284e704cadb323cd1 (proc connector: add\nevent for process becoming session leader) we have the following warning:\n\nBadness at kernel/softirq.c:143\n[...]\nKrnl PSW : 0404c00180000000 00000000001481d4 (local_bh_enable+0xb0/0xe0)\n[...]\nCall Trace:\n([\u003c000000013fe04100\u003e] 0x13fe04100)\n [\u003c000000000048a946\u003e] sk_filter+0x9a/0xd0\n [\u003c000000000049d938\u003e] netlink_broadcast+0x2c0/0x53c\n [\u003c00000000003ba9ae\u003e] cn_netlink_send+0x272/0x2b0\n [\u003c00000000003baef0\u003e] proc_sid_connector+0xc4/0xd4\n [\u003c0000000000142604\u003e] __set_special_pids+0x58/0x90\n [\u003c0000000000159938\u003e] sys_setsid+0xb4/0xd8\n [\u003c00000000001187fe\u003e] sysc_noemu+0x10/0x16\n [\u003c00000041616cb266\u003e] 0x41616cb266\n\nThe warning is\n---\u003e WARN_ON_ONCE(in_irq() || irqs_disabled());\n\nThe network code must not be called with disabled interrupts but\nsys_setsid holds the tasklist_lock with spinlock_irq while calling the\nconnector.\n\nAfter a discussion we agreed that we can move proc_sid_connector from\n__set_special_pids to sys_setsid.\n\nWe also agreed that it is sufficient to change the check from\ntask_session(curr) !\u003d pid into err \u003e 0, since if we don\u0027t change the\nsession, this means we were already the leader and return -EPERM.\n\nOne last thing:\nThere is also daemonize(), and some people might want to get a\nnotification in that case. Since daemonize() is only needed if a user\nspace does kernel_thread this does not look important (and there seems\nto be no consensus if this connector should be called in daemonize). If\nwe really want this, we can add proc_sid_connector to daemonize() in an\nadditional patch (Scott?)\n\nSigned-off-by: Christian Borntraeger \u003cborntraeger@de.ibm.com\u003e\nCc: Scott James Remnant \u003cscott@ubuntu.com\u003e\nCc: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nCc: David S. Miller \u003cdavem@davemloft.net\u003e\nAcked-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Evgeniy Polyakov \u003czbr@ioremap.net\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6f15fa50087c8317e353145319466afbeb27a75d", "tree": "599f2b9bc105a6495a63cbb914352521eb86a63b", "parents": [ "1a6deaea3584fd7af1cad492b1fe0867060b45db" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Fri Oct 09 20:31:33 2009 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Wed Oct 14 15:31:10 2009 +0200" }, "message": "sys: Remove BKL from sys_reboot\n\nSerialization of sys_reboot can be done local. The BKL is not\nprotecting anything else.\n\nLKML-Reference: \u003c20091010153349.405590702@linutronix.de\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "1087e9b4ff708976499b4de541d9e1d57d49b60a", "tree": "a370356b3f969b6081189d850d9a56921ed341c4", "parents": [ "f0a221ef47df3cdde2123fe75ce3b61bb7df656d" ], "author": { "name": "Andi Kleen", "email": "ak@linux.intel.com", "time": "Sun Oct 04 02:20:11 2009 +0200" }, "committer": { "name": "Andi Kleen", "email": "ak@linux.intel.com", "time": "Sun Oct 04 03:23:17 2009 +0200" }, "message": "HWPOISON: Clean up PR_MCE_KILL interface\n\nWhile writing the manpage I noticed some shortcomings in the\ncurrent interface.\n\n- Define symbolic names for all the different values\n- Boundary check the kill mode values\n- For symmetry add a get interface too. This allows library\ncode to get/set the current state.\n- For consistency define a PR_MCE_KILL_DEFAULT value\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\n" }, { "commit": "db16826367fefcb0ddb93d76b66adc52eb4e6339", "tree": "626224c1eb1eb79c522714591f208b4fdbdcd9d4", "parents": [ "cd6045138ed1bb5d8773e940d51c34318eef3ef2", "465fdd97cbe16ef8727221857e96ef62dd352017" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:53:22 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:53:22 2009 -0700" }, "message": "Merge branch \u0027hwpoison\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6\n\n* \u0027hwpoison\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: (21 commits)\n HWPOISON: Enable error_remove_page on btrfs\n HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs\n HWPOISON: Add madvise() based injector for hardware poisoned pages v4\n HWPOISON: Enable error_remove_page for NFS\n HWPOISON: Enable .remove_error_page for migration aware file systems\n HWPOISON: The high level memory error handler in the VM v7\n HWPOISON: Add PR_MCE_KILL prctl to control early kill behaviour per process\n HWPOISON: shmem: call set_page_dirty() with locked page\n HWPOISON: Define a new error_remove_page address space op for async truncation\n HWPOISON: Add invalidate_inode_page\n HWPOISON: Refactor truncate to allow direct truncating of page v2\n HWPOISON: check and isolate corrupted free pages v2\n HWPOISON: Handle hardware poisoned pages in try_to_unmap\n HWPOISON: Use bitmask/action code for try_to_unmap behaviour\n HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler v2\n HWPOISON: Add poison check to page fault handling\n HWPOISON: Add basic support for poisoned pages in fault handler v3\n HWPOISON: Add new SIGBUS error codes for hardware poison signals\n HWPOISON: Add support for poison swap entries v2\n HWPOISON: Export some rmap vma locking to outside world\n ...\n" }, { "commit": "1f10206cf8e945220f7220a809d8bfc15c21f9a5", "tree": "4f2c48ccf9cc52dad9610df54e301e631a351288", "parents": [ "b28cfd2c0616e1b42acc6ee3c77ef6cc3873c510" ], "author": { "name": "Jiri Pirko", "email": "jpirko@redhat.com", "time": "Tue Sep 22 16:44:10 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Sep 23 07:39:30 2009 -0700" }, "message": "getrusage: fill ru_maxrss value\n\nMake -\u003eru_maxrss value in struct rusage filled accordingly to rss hiwater\nmark. This struct is filled as a parameter to getrusage syscall.\n-\u003eru_maxrss value is set to KBs which is the way it is done in BSD\nsystems. /usr/bin/time (gnu time) application converts -\u003eru_maxrss to KBs\nwhich seems to be incorrect behavior. Maintainer of this util was\nnotified by me with the patch which corrects it and cc\u0027ed.\n\nTo make this happen we extend struct signal_struct by two fields. The\nfirst one is -\u003emaxrss which we use to store rss hiwater of the task. The\nsecond one is -\u003ecmaxrss which we use to store highest rss hiwater of all\ntask childs. These values are used in k_getrusage() to actually fill\n-\u003eru_maxrss. k_getrusage() uses current rss hiwater value directly if mm\nstruct exists.\n\nNote:\nexec() clear mm-\u003ehiwater_rss, but doesn\u0027t clear sig-\u003emaxrss.\nit is intetionally behavior. *BSD getrusage have exec() inheriting.\n\ntest programs\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n\ngetrusage.c\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n #include \u003cstdio.h\u003e\n #include \u003cstdlib.h\u003e\n #include \u003cstring.h\u003e\n #include \u003csys/types.h\u003e\n #include \u003csys/time.h\u003e\n #include \u003csys/resource.h\u003e\n #include \u003csys/types.h\u003e\n #include \u003csys/wait.h\u003e\n #include \u003cunistd.h\u003e\n #include \u003csignal.h\u003e\n #include \u003csys/mman.h\u003e\n\n #include \"common.h\"\n\n #define err(str) perror(str), exit(1)\n\nint main(int argc, char** argv)\n{\n\tint status;\n\n\tprintf(\"allocate 100MB\\n\");\n\tconsume(100);\n\n\tprintf(\"testcase1: fork inherit? \\n\");\n\tprintf(\" expect: initial.self ~\u003d child.self\\n\");\n\tshow_rusage(\"initial\");\n\tif (__fork()) {\n\t\twait(\u0026status);\n\t} else {\n\t\tshow_rusage(\"fork child\");\n\t\t_exit(0);\n\t}\n\tprintf(\"\\n\");\n\n\tprintf(\"testcase2: fork inherit? (cont.) \\n\");\n\tprintf(\" expect: initial.children ~\u003d 100MB, but child.children \u003d 0\\n\");\n\tshow_rusage(\"initial\");\n\tif (__fork()) {\n\t\twait(\u0026status);\n\t} else {\n\t\tshow_rusage(\"child\");\n\t\t_exit(0);\n\t}\n\tprintf(\"\\n\");\n\n\tprintf(\"testcase3: fork + malloc \\n\");\n\tprintf(\" expect: child.self ~\u003d initial.self + 50MB\\n\");\n\tshow_rusage(\"initial\");\n\tif (__fork()) {\n\t\twait(\u0026status);\n\t} else {\n\t\tprintf(\"allocate +50MB\\n\");\n\t\tconsume(50);\n\t\tshow_rusage(\"fork child\");\n\t\t_exit(0);\n\t}\n\tprintf(\"\\n\");\n\n\tprintf(\"testcase4: grandchild maxrss\\n\");\n\tprintf(\" expect: post_wait.children ~\u003d 300MB\\n\");\n\tshow_rusage(\"initial\");\n\tif (__fork()) {\n\t\twait(\u0026status);\n\t\tshow_rusage(\"post_wait\");\n\t} else {\n\t\tsystem(\"./child -n 0 -g 300\");\n\t\t_exit(0);\n\t}\n\tprintf(\"\\n\");\n\n\tprintf(\"testcase5: zombie\\n\");\n\tprintf(\" expect: pre_wait ~\u003d initial, IOW the zombie process is not accounted.\\n\");\n\tprintf(\" post_wait ~\u003d 400MB, IOW wait() collect child\u0027s max_rss. \\n\");\n\tshow_rusage(\"initial\");\n\tif (__fork()) {\n\t\tsleep(1); /* children become zombie */\n\t\tshow_rusage(\"pre_wait\");\n\t\twait(\u0026status);\n\t\tshow_rusage(\"post_wait\");\n\t} else {\n\t\tsystem(\"./child -n 400\");\n\t\t_exit(0);\n\t}\n\tprintf(\"\\n\");\n\n\tprintf(\"testcase6: SIG_IGN\\n\");\n\tprintf(\" expect: initial ~\u003d after_zombie (child\u0027s 500MB alloc should be ignored).\\n\");\n\tshow_rusage(\"initial\");\n\tsignal(SIGCHLD, SIG_IGN);\n\tif (__fork()) {\n\t\tsleep(1); /* children become zombie */\n\t\tshow_rusage(\"after_zombie\");\n\t} else {\n\t\tsystem(\"./child -n 500\");\n\t\t_exit(0);\n\t}\n\tprintf(\"\\n\");\n\tsignal(SIGCHLD, SIG_DFL);\n\n\tprintf(\"testcase7: exec (without fork) \\n\");\n\tprintf(\" expect: initial ~\u003d exec \\n\");\n\tshow_rusage(\"initial\");\n\texecl(\"./child\", \"child\", \"-v\", NULL);\n\n\treturn 0;\n}\n\nchild.c\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n #include \u003csys/types.h\u003e\n #include \u003cunistd.h\u003e\n #include \u003csys/types.h\u003e\n #include \u003csys/wait.h\u003e\n #include \u003cstdio.h\u003e\n #include \u003cstdlib.h\u003e\n #include \u003cstring.h\u003e\n #include \u003csys/types.h\u003e\n #include \u003csys/time.h\u003e\n #include \u003csys/resource.h\u003e\n\n #include \"common.h\"\n\nint main(int argc, char** argv)\n{\n\tint status;\n\tint c;\n\tlong consume_size \u003d 0;\n\tlong grandchild_consume_size \u003d 0;\n\tint show \u003d 0;\n\n\twhile ((c \u003d getopt(argc, argv, \"n:g:v\")) !\u003d -1) {\n\t\tswitch (c) {\n\t\tcase \u0027n\u0027:\n\t\t\tconsume_size \u003d atol(optarg);\n\t\t\tbreak;\n\t\tcase \u0027v\u0027:\n\t\t\tshow \u003d 1;\n\t\t\tbreak;\n\t\tcase \u0027g\u0027:\n\n\t\t\tgrandchild_consume_size \u003d atol(optarg);\n\t\t\tbreak;\n\t\tdefault:\n\t\t\tbreak;\n\t\t}\n\t}\n\n\tif (show)\n\t\tshow_rusage(\"exec\");\n\n\tif (consume_size) {\n\t\tprintf(\"child alloc %ldMB\\n\", consume_size);\n\t\tconsume(consume_size);\n\t}\n\n\tif (grandchild_consume_size) {\n\t\tif (fork()) {\n\t\t\twait(\u0026status);\n\t\t} else {\n\t\t\tprintf(\"grandchild alloc %ldMB\\n\", grandchild_consume_size);\n\t\t\tconsume(grandchild_consume_size);\n\n\t\t\texit(0);\n\t\t}\n\t}\n\n\treturn 0;\n}\n\ncommon.c\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n #include \u003cstdio.h\u003e\n #include \u003cstdlib.h\u003e\n #include \u003cstring.h\u003e\n #include \u003csys/types.h\u003e\n #include \u003csys/time.h\u003e\n #include \u003csys/resource.h\u003e\n #include \u003csys/types.h\u003e\n #include \u003csys/wait.h\u003e\n #include \u003cunistd.h\u003e\n #include \u003csignal.h\u003e\n #include \u003csys/mman.h\u003e\n\n #include \"common.h\"\n #define err(str) perror(str), exit(1)\n\nvoid show_rusage(char *prefix)\n{\n \tint err, err2;\n \tstruct rusage rusage_self;\n \tstruct rusage rusage_children;\n\n \tprintf(\"%s: \", prefix);\n \terr \u003d getrusage(RUSAGE_SELF, \u0026rusage_self);\n \tif (!err)\n \t\tprintf(\"self %ld \", rusage_self.ru_maxrss);\n \terr2 \u003d getrusage(RUSAGE_CHILDREN, \u0026rusage_children);\n \tif (!err2)\n \t\tprintf(\"children %ld \", rusage_children.ru_maxrss);\n\n \tprintf(\"\\n\");\n}\n\n/* Some buggy OS need this worthless CPU waste. */\nvoid make_pagefault(void)\n{\n\tvoid *addr;\n\tint size \u003d getpagesize();\n\tint i;\n\n\tfor (i\u003d0; i\u003c1000; i++) {\n\t\taddr \u003d mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);\n\t\tif (addr \u003d\u003d MAP_FAILED)\n\t\t\terr(\"make_pagefault\");\n\t\tmemset(addr, 0, size);\n\t\tmunmap(addr, size);\n\t}\n}\n\nvoid consume(int mega)\n{\n \tsize_t sz \u003d mega * 1024 * 1024;\n \tvoid *ptr;\n\n \tptr \u003d malloc(sz);\n \tmemset(ptr, 0, sz);\n\tmake_pagefault();\n}\n\npid_t __fork(void)\n{\n\tpid_t pid;\n\n\tpid \u003d fork();\n\tmake_pagefault();\n\n\treturn pid;\n}\n\ncommon.h\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\nvoid show_rusage(char *prefix);\nvoid make_pagefault(void);\nvoid consume(int mega);\npid_t __fork(void);\n\nFreeBSD result (expected result)\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\nallocate 100MB\ntestcase1: fork inherit?\n expect: initial.self ~\u003d child.self\ninitial: self 103492 children 0\nfork child: self 103540 children 0\n\ntestcase2: fork inherit? (cont.)\n expect: initial.children ~\u003d 100MB, but child.children \u003d 0\ninitial: self 103540 children 103540\nchild: self 103564 children 0\n\ntestcase3: fork + malloc\n expect: child.self ~\u003d initial.self + 50MB\ninitial: self 103564 children 103564\nallocate +50MB\nfork child: self 154860 children 0\n\ntestcase4: grandchild maxrss\n expect: post_wait.children ~\u003d 300MB\ninitial: self 103564 children 154860\ngrandchild alloc 300MB\npost_wait: self 103564 children 308720\n\ntestcase5: zombie\n expect: pre_wait ~\u003d initial, IOW the zombie process is not accounted.\n post_wait ~\u003d 400MB, IOW wait() collect child\u0027s max_rss.\ninitial: self 103564 children 308720\nchild alloc 400MB\npre_wait: self 103564 children 308720\npost_wait: self 103564 children 411312\n\ntestcase6: SIG_IGN\n expect: initial ~\u003d after_zombie (child\u0027s 500MB alloc should be ignored).\ninitial: self 103564 children 411312\nchild alloc 500MB\nafter_zombie: self 103624 children 411312\n\ntestcase7: exec (without fork)\n expect: initial ~\u003d exec\ninitial: self 103624 children 411312\nexec: self 103624 children 411312\n\nLinux result (actual test result)\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\nallocate 100MB\ntestcase1: fork inherit?\n expect: initial.self ~\u003d child.self\ninitial: self 102848 children 0\nfork child: self 102572 children 0\n\ntestcase2: fork inherit? (cont.)\n expect: initial.children ~\u003d 100MB, but child.children \u003d 0\ninitial: self 102876 children 102644\nchild: self 102572 children 0\n\ntestcase3: fork + malloc\n expect: child.self ~\u003d initial.self + 50MB\ninitial: self 102876 children 102644\nallocate +50MB\nfork child: self 153804 children 0\n\ntestcase4: grandchild maxrss\n expect: post_wait.children ~\u003d 300MB\ninitial: self 102876 children 153864\ngrandchild alloc 300MB\npost_wait: self 102876 children 307536\n\ntestcase5: zombie\n expect: pre_wait ~\u003d initial, IOW the zombie process is not accounted.\n post_wait ~\u003d 400MB, IOW wait() collect child\u0027s max_rss.\ninitial: self 102876 children 307536\nchild alloc 400MB\npre_wait: self 102876 children 307536\npost_wait: self 102876 children 410076\n\ntestcase6: SIG_IGN\n expect: initial ~\u003d after_zombie (child\u0027s 500MB alloc should be ignored).\ninitial: self 102876 children 410076\nchild alloc 500MB\nafter_zombie: self 102880 children 410076\n\ntestcase7: exec (without fork)\n expect: initial ~\u003d exec\ninitial: self 102880 children 410076\nexec: self 102880 children 410076\n\nSigned-off-by: Jiri Pirko \u003cjpirko@redhat.com\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cdd6c482c9ff9c55475ee7392ec8f672eddb7be6", "tree": "81f98a3ab46c589792057fe2392c1e10f8ad7893", "parents": [ "dfc65094d0313cc48969fa60bcf33d693aeb05a7" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Sep 21 12:02:48 2009 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Sep 21 14:28:04 2009 +0200" }, "message": "perf: Do the big rename: Performance Counters -\u003e Performance Events\n\nBye-bye Performance Counters, welcome Performance Events!\n\nIn the past few months the perfcounters subsystem has grown out its\ninitial role of counting hardware events, and has become (and is\nbecoming) a much broader generic event enumeration, reporting, logging,\nmonitoring, analysis facility.\n\nNaming its core object \u0027perf_counter\u0027 and naming the subsystem\n\u0027perfcounters\u0027 has become more and more of a misnomer. With pending\ncode like hw-breakpoints support the \u0027counter\u0027 name is less and\nless appropriate.\n\nAll in one, we\u0027ve decided to rename the subsystem to \u0027performance\nevents\u0027 and to propagate this rename through all fields, variables\nand API names. (in an ABI compatible fashion)\n\nThe word \u0027event\u0027 is also a bit shorter than \u0027counter\u0027 - which makes\nit slightly more convenient to write/handle as well.\n\nThanks goes to Stephane Eranian who first observed this misnomer and\nsuggested a rename.\n\nUser-space tooling and ABI compatibility is not affected - this patch\nshould be function-invariant. (Also, defconfigs were not touched to\nkeep the size down.)\n\nThis patch has been generated via the following script:\n\n FILES\u003d$(find * -type f | grep -vE \u0027oprofile|[^K]config\u0027)\n\n sed -i \\\n -e \u0027s/PERF_EVENT_/PERF_RECORD_/g\u0027 \\\n -e \u0027s/PERF_COUNTER/PERF_EVENT/g\u0027 \\\n -e \u0027s/perf_counter/perf_event/g\u0027 \\\n -e \u0027s/nb_counters/nb_events/g\u0027 \\\n -e \u0027s/swcounter/swevent/g\u0027 \\\n -e \u0027s/tpcounter_event/tp_event/g\u0027 \\\n $FILES\n\n for N in $(find . -name perf_counter.[ch]); do\n M\u003d$(echo $N | sed \u0027s/perf_counter/perf_event/g\u0027)\n mv $N $M\n done\n\n FILES\u003d$(find . -name perf_event.*)\n\n sed -i \\\n -e \u0027s/COUNTER_MASK/REG_MASK/g\u0027 \\\n -e \u0027s/COUNTER/EVENT/g\u0027 \\\n -e \u0027s/\\\u003cevent\\\u003e/event_id/g\u0027 \\\n -e \u0027s/counter/event/g\u0027 \\\n -e \u0027s/Counter/Event/g\u0027 \\\n $FILES\n\n... to keep it as correct as possible. This script can also be\nused by anyone who has pending perfcounters patches - it converts\na Linux kernel tree over to the new naming. We tried to time this\nchange to the point in time where the amount of pending patches\nis the smallest: the end of the merge window.\n\nNamespace clashes were fixed up in a preparatory patch - and some\nstylistic fallout will be fixed up in a subsequent patch.\n\n( NOTE: \u0027counters\u0027 are still the proper terminology when we deal\n with hardware registers - and these sed scripts are a bit\n over-eager in renaming them. I\u0027ve undone some of that, but\n in case there\u0027s something left where \u0027counter\u0027 would be\n better than \u0027event\u0027 we can undo that on an individual basis\n instead of touching an otherwise nicely automated patch. )\n\nSuggested-by: Stephane Eranian \u003ceranian@google.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Paul Mackerras \u003cpaulus@samba.org\u003e\nReviewed-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc: Kyle McMartin \u003ckyle@mcmartin.ca\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nCc: \u003clinux-arch@vger.kernel.org\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "4db96cf077aa938b11fe7ac79ecc9b29ec00fbab", "tree": "ec196e85769159f29952e34305795b47513639a0", "parents": [ "6746aff74da293b5fd24e5c68b870b721e86cd5f" ], "author": { "name": "Andi Kleen", "email": "andi@firstfloor.org", "time": "Wed Sep 16 11:50:14 2009 +0200" }, "committer": { "name": "Andi Kleen", "email": "ak@linux.intel.com", "time": "Wed Sep 16 11:50:14 2009 +0200" }, "message": "HWPOISON: Add PR_MCE_KILL prctl to control early kill behaviour per process\n\nThis allows processes to override their early/late kill\nbehaviour on hardware memory errors.\n\nTypically applications which are memory error aware is\nbetter of with early kill (see the error as soon\nas possible), all others with late kill (only\nsee the error when the error is really impacting execution)\n\nThere\u0027s a global sysctl, but this way an application\ncan set its specific policy.\n\nWe\u0027re using two bits, one to signify that the process\nstated its intention and that\n\nI also made the prctl future proof by enforcing\nthe unused arguments are 0.\n\nThe state is inherited to children.\n\nNote this makes us officially run out of process flags\non 32bit, but the next patch can easily add another field.\n\nManpage patch will be supplied separately.\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\n" }, { "commit": "30639b6af85a92491b22dd14c17b14ca11da60e6", "tree": "f21c4dd631da5b8750678958b29947d4d0e90cb0", "parents": [ "8b0b1db0133e4218a9b45c09e53793c039edebe1" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Tue Jun 16 15:33:40 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:48 2009 -0700" }, "message": "groups: move code to kernel/groups.c\n\nMove supplementary groups implementation to kernel/groups.c .\nkernel/sys.c already accumulated quite a few random stuff.\n\nDo strictly copy/paste + add required headers to compile. Compile-tested\non many configs and archs.\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e7fd5d4b3d240f42c30a9e3d20a4689c4d3a795a", "tree": "4ba588631dd8189a818a91c9e3976526071178b6", "parents": [ "1130b0296184bc21806225fd06d533515a99d2db", "56a50adda49b2020156616c4eb15353e0f9ad7de" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Apr 29 14:46:59 2009 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Apr 29 14:47:05 2009 +0200" }, "message": "Merge branch \u0027linus\u0027 into perfcounters/core\n\nMerge reason: This brach was on -rc1, refresh it to almost-rc4 to pick up\n the latest upstream fixes.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "3d26dcf7679c5cc6c9f3b95ffdb2152fba2b7fae", "tree": "4d2b6f5e36a20ed02021a1956b53a5ef6d6f8932", "parents": [ "4cafbd0b94d2c8cae6ede6d1c3ab90547547a3d2" ], "author": { "name": "Andi Kleen", "email": "andi@firstfloor.org", "time": "Mon Apr 13 14:40:08 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 13 15:04:32 2009 -0700" }, "message": "kernel/sys.c: clean up sys_shutdown exit path\n\nImpact: cleanup, fix\n\nClean up sys_shutdown() exit path. Factor out common code. Return\ncorrect error code instead of always 0 on failure.\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f541ae326fa120fa5c57433e4d9a133df212ce41", "tree": "bdbd94ec72cfc601118051cb35e8617d55510177", "parents": [ "e255357764f92afcafafbd4879b222b8c752065a", "0221c81b1b8eb0cbb6b30a0ced52ead32d2b4e4c" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Apr 06 09:02:57 2009 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Apr 06 09:02:57 2009 +0200" }, "message": "Merge branch \u0027linus\u0027 into perfcounters/core-v2\n\nMerge reason: we have gathered quite a few conflicts, need to merge upstream\n\nConflicts:\n\tarch/powerpc/kernel/Makefile\n\tarch/x86/ia32/ia32entry.S\n\tarch/x86/include/asm/hardirq.h\n\tarch/x86/include/asm/unistd_32.h\n\tarch/x86/include/asm/unistd_64.h\n\tarch/x86/kernel/cpu/common.c\n\tarch/x86/kernel/irq.c\n\tarch/x86/kernel/syscall_table_32.S\n\tarch/x86/mm/iomap_32.c\n\tinclude/linux/sched.h\n\tkernel/Makefile\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8fe74cf053de7ad2124a894996f84fa890a81093", "tree": "77dcd8fbf33ce53a3821942233962fb28c6f2848", "parents": [ "c2eb2fa6d2b6fe122d3479ec5b28d978418b2698", "ced117c73edc917e96dea7cca98c91383f0792f7" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 21:09:10 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 21:09:10 2009 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:\n Remove two unneeded exports and make two symbols static in fs/mpage.c\n Cleanup after commit 585d3bc06f4ca57f975a5a1f698f65a45ea66225\n Trim includes of fdtable.h\n Don\u0027t crap into descriptor table in binfmt_som\n Trim includes in binfmt_elf\n Don\u0027t mess with descriptor table in load_elf_binary()\n Get rid of indirect include of fs_struct.h\n New helper - current_umask()\n check_unsafe_exec() doesn\u0027t care about signal handlers sharing\n New locking/refcounting for fs_struct\n Take fs_struct handling to new file (fs/fs_struct.c)\n Get rid of bumping fs_struct refcount in pivot_root(2)\n Kill unsharing fs_struct in __set_personality()\n" }, { "commit": "1b0f7ffd0ea27cd3a0b9ca04e3df9522048c32a3", "tree": "a8c27acdf95f55f93fe86661c6cba4cd36c8e4f1", "parents": [ "52ee2dfdd4f51cf422ea6a96a0846dc94244aa37" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Apr 02 16:58:39 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:05:02 2009 -0700" }, "message": "pids: kill signal_struct-\u003e __pgrp/__session and friends\n\nWe are wasting 2 words in signal_struct without any reason to implement\ntask_pgrp_nr() and task_session_nr().\n\ntask_session_nr() has no callers since\n2e2ba22ea4fd4bb85f0fa37c521066db6775cbef, we can remove it.\n\ntask_pgrp_nr() is still (I believe wrongly) used in fs/autofsX and\nfs/coda.\n\nThis patch reimplements task_pgrp_nr() via task_pgrp_nr_ns(), and kills\n__pgrp/__session and the related helpers.\n\nThe change in drivers/char/tty_io.c is cosmetic, but hopefully makes sense\nanyway.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Alan Cox \u003cnumber6@the-village.bc.nu\u003e\t\t[tty parts]\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Eric Biederman \u003cebiederm@xmission.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Sukadev Bhattiprolu \u003csukadev@linux.vnet.ibm.com\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5ad4e53bd5406ee214ddc5a41f03f779b8b2d526", "tree": "b3dab5140284b3edf02bf2b13f74bfddb25aa62a", "parents": [ "ce3b0f8d5c2203301fc87f3aaaed73e5819e2a48" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sun Mar 29 19:50:06 2009 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Mar 31 23:00:27 2009 -0400" }, "message": "Get rid of indirect include of fs_struct.h\n\nDon\u0027t pull it in sched.h; very few files actually need it and those\ncan include directly. sched.h itself only needs forward declaration\nof struct fs_struct;\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "8163d88c79dca35478a2405c837733ac50ea4c39", "tree": "6acae066a09b7dcbedab4a35ad62eba4ba3fd83c", "parents": [ "a1ef58f442542d8b3e3b963339fbc522c36e827c", "fec6c6fec3e20637bee5d276fb61dd8b49a3f9cc" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Mar 04 11:42:31 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Mar 04 11:42:31 2009 +0100" }, "message": "Merge commit \u0027v2.6.29-rc7\u0027 into perfcounters/core\n\nConflicts:\n\tarch/x86/mm/iomap_32.c\n" }, { "commit": "54e991242850edc8c53f71fa5aa3ba7a93ce38f5", "tree": "7f136214aab690a8ee4a294ca9c1a7e01de0dc49", "parents": [ "cac64d00c256e65776d575e82aaf540632b66178" ], "author": { "name": "Dhaval Giani", "email": "dhaval@linux.vnet.ibm.com", "time": "Fri Feb 27 15:13:54 2009 +0530" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Feb 27 11:11:53 2009 +0100" }, "message": "sched: don\u0027t allow setuid to succeed if the user does not have rt bandwidth\n\nImpact: fix hung task with certain (non-default) rt-limit settings\n\nCorey Hickey reported that on using setuid to change the uid of a\nrt process, the process would be unkillable and not be running.\nThis is because there was no rt runtime for that user group. Add\nin a check to see if a user can attach an rt task to its task group.\nOn failure, return EINVAL, which is also returned in\nCONFIG_CGROUP_SCHED.\n\nReported-by: Corey Hickey \u003cbugfood-ml@fatooh.org\u003e\nSigned-off-by: Dhaval Giani \u003cdhaval@linux.vnet.ibm.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "95fd4845ed0ffcab305b4f30ce1c12dc34f1b56c", "tree": "aa2aac22a5b329b778a6771a87bbf1945ad49bbd", "parents": [ "d278c48435625cb6b7edcf6a547620768b175709", "8e4921515c1a379539607eb443d51c30f4f7f338" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Feb 11 09:22:04 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Feb 11 09:22:04 2009 +0100" }, "message": "Merge commit \u0027v2.6.29-rc4\u0027 into perfcounters/core\n\nConflicts:\n\tarch/x86/kernel/setup_percpu.c\n\tarch/x86/mm/fault.c\n\tdrivers/acpi/processor_idle.c\n\tkernel/irq/handle.c\n" }, { "commit": "60fd760fb9ff7034360bab7137c917c0330628c2", "tree": "2498b0456b49dc0f4e7db34a9c1d3858e2b5eaf9", "parents": [ "a68e61e8ff2d46327a37b69056998b47745db6fa" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Wed Feb 04 15:12:06 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Feb 05 12:56:47 2009 -0800" }, "message": "revert \"rlimit: permit setting RLIMIT_NOFILE to RLIM_INFINITY\"\n\nRevert commit 0c2d64fb6cae9aae480f6a46cfe79f8d7d48b59f because it causes\n(arguably poorly designed) existing userspace to spend interminable\nperiods closing billions of not-open file descriptors.\n\nWe could bring this back, with some sort of opt-in tunable in /proc, which\ndefaults to \"off\".\n\nPeter\u0027s alanysis follows:\n\n: I spent several hours trying to get to the bottom of a serious\n: performance issue that appeared on one of our servers after upgrading to\n: 2.6.28. In the end it\u0027s what could be considered a userspace bug that\n: was triggered by a change in 2.6.28. Since this might also affect other\n: people I figured I\u0027d at least document what I found here, and maybe we\n: can even do something about it:\n:\n:\n: So, I upgraded some of debian.org\u0027s machines to 2.6.28.1 and immediately\n: the team maintaining our ftp archive complained that one of their\n: scripts that previously ran in a few minutes still hadn\u0027t even come\n: close to being done after an hour or so. Downgrading to 2.6.27 fixed\n: that.\n:\n: Turns out that script is forking a lot and something in it or python or\n: whereever closes all the file descriptors it doesn\u0027t want to pass on.\n: That is, it starts at zero and goes up to ulimit -n/RLIMIT_NOFILE and\n: closes them all with a few exceptions.\n:\n: Turns out that takes a long time when your limit -n is now 2^20 (1048576).\n:\n: With 2.6.27.* the ulimit -n was the standard 1024, but with 2.6.28 it is\n: now a thousand times that.\n:\n: 2.6.28 included a patch titled \"rlimit: permit setting RLIMIT_NOFILE to\n: RLIM_INFINITY\" (0c2d64fb6cae9aae480f6a46cfe79f8d7d48b59f)[1] that\n: allows, as the title implies, to set the limit for number of files to\n: infinity.\n:\n: Closer investigation showed that the broken default ulimit did not apply\n: to \"system\" processes (like stuff started from init). In the end I\n: could establish that all processes that passed through pam_limit at one\n: point had the bad resource limit.\n:\n: Apparently the pam library in Debian etch (4.0) initializes the limits\n: to some default values when it doesn\u0027t have any settings in limit.conf\n: to override them. Turns out that for nofiles this is RLIM_INFINITY.\n: Commenting out \"case RLIMIT_NOFILE\" in pam_limit.c:267 of our pam\n: package version 0.79-5 fixes that - tho I\u0027m not sure what side effects\n: that has.\n:\n: Debian lenny (the upcoming 5.0 version) doesn\u0027t have this issue as it\n: uses a different pam (version).\n\nReported-by: Peter Palfrader \u003cweasel@debian.org\u003e\nCc: Adam Tkac \u003cvonsch@gmail.com\u003e\nCc: Michael Kerrisk \u003cmtk.manpages@googlemail.com\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[2.6.28.x]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "77835492ed489c0b870f82f4c50687bd267acc0a", "tree": "d80903ce1b8dd30aa44ccfc756616ad4d6c74d63", "parents": [ "af37501c792107c2bde1524bdae38d9a247b841a", "1de9e8e70f5acc441550ca75433563d91b269bbe" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jan 21 16:37:27 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jan 21 16:37:27 2009 +0100" }, "message": "Merge commit \u0027v2.6.29-rc2\u0027 into perfcounters/core\n\nConflicts:\n\tinclude/linux/syscalls.h\n" }, { "commit": "836f92adf121f806e9beb5b6b88bd5c9c4ea3f24", "tree": "0deccad6d01b7761a8d96cbc12b8e9541317380e", "parents": [ "6559eed8ca7db0531a207cd80be5e28cd6f213c5" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:14:33 2009 +0100" }, "committer": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:15:31 2009 +0100" }, "message": "[CVE-2009-0029] System call wrappers part 31\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\n" }, { "commit": "c4ea37c26a691ad0b7e86aa5884aab27830e95c9", "tree": "4a3bd25e61cd3782f535ad2140a01bf3835dca4f", "parents": [ "d5460c9974a321a194aded4a8c4daaac68ea8171" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:14:28 2009 +0100" }, "committer": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:15:29 2009 +0100" }, "message": "[CVE-2009-0029] System call wrappers part 26\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\n" }, { "commit": "e48fbb699f82ef1e80bd7126046394d2dc9ca7e6", "tree": "d361155949c3c31724946a6d619ece7a093e30a1", "parents": [ "5a8a82b1d306a325d899b67715618413657efda4" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:14:26 2009 +0100" }, "committer": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:15:28 2009 +0100" }, "message": "[CVE-2009-0029] System call wrappers part 24\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\n" }, { "commit": "5a8a82b1d306a325d899b67715618413657efda4", "tree": "ac599eb041a3cdcbbb3ba0a67ff2f14e251371f5", "parents": [ "3e0fa65f8ba4fd24b3dcfaf14d5b15eaab0fdc61" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:14:25 2009 +0100" }, "committer": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:15:28 2009 +0100" }, "message": "[CVE-2009-0029] System call wrappers part 23\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\n" }, { "commit": "754fe8d297bfae7b77f7ce866e2fb0c5fb186506", "tree": "b2650f728d50791fa86ecd8c49806f51db714bd4", "parents": [ "5add95d4f7cf08f6f62510f19576992912387501" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:14:09 2009 +0100" }, "committer": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:15:20 2009 +0100" }, "message": "[CVE-2009-0029] System call wrappers part 07\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\n" }, { "commit": "b290ebe2c46d01b742b948ce03f09e8a3efb9a92", "tree": "4419602f911a8205de2160c56a0ff844f350557e", "parents": [ "ae1251ab785f6da87219df8352ffdac68bba23e4" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:14:06 2009 +0100" }, "committer": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:15:19 2009 +0100" }, "message": "[CVE-2009-0029] System call wrappers part 04\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\n" }, { "commit": "ae1251ab785f6da87219df8352ffdac68bba23e4", "tree": "8a37770a08b78f8c184764f34cf8455c894ce117", "parents": [ "dbf040d9d1cbf1ef6250bdb095c5c118950bcde8" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:14:05 2009 +0100" }, "committer": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:15:19 2009 +0100" }, "message": "[CVE-2009-0029] System call wrappers part 03\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\n" }, { "commit": "dbf040d9d1cbf1ef6250bdb095c5c118950bcde8", "tree": "4e09682734b04601b06660e513e67ba0eb062e55", "parents": [ "58fd3aa288939d3097fa04505b25c2f5e6e144d1" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:14:04 2009 +0100" }, "committer": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:15:19 2009 +0100" }, "message": "[CVE-2009-0029] System call wrappers part 02\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\n" }, { "commit": "58fd3aa288939d3097fa04505b25c2f5e6e144d1", "tree": "73d65d8494f80884c765265d78496fba6ef00784", "parents": [ "6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:14:03 2009 +0100" }, "committer": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Jan 14 14:15:18 2009 +0100" }, "message": "[CVE-2009-0029] System call wrappers part 01\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\n" }, { "commit": "506c10f26c481b7f8ef27c1c79290f68989b2e9e", "tree": "03de82e812f00957aa6276dac2fe51c3358e88d7", "parents": [ "e1df957670aef74ffd9a4ad93e6d2c90bf6b4845", "c59765042f53a79a7a65585042ff463b69cb248c" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Jan 11 02:42:53 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Jan 11 02:42:53 2009 +0100" }, "message": "Merge commit \u0027v2.6.29-rc1\u0027 into perfcounters/core\n\nConflicts:\n\tinclude/linux/kernel_stat.h\n" }, { "commit": "cfa97f993c275d193fe82c22511dfb5f1e51b661", "tree": "552cea5db0ef07bbcc5d53850607dcda6f9b664c", "parents": [ "7238eb4ca35cd63340dc02caf757376e40c1210c", "db2f59c8c9b315f2b88b1dac159b988c6009034d" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 17:10:33 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 17:10:33 2009 -0800" }, "message": "Merge branch \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n sched: fix section mismatch\n sched: fix double kfree in failure path\n sched: clean up arch_reinit_sched_domains()\n sched: mark sched_create_sysfs_power_savings_entries() as __init\n getrusage: RUSAGE_THREAD should return ru_utime and ru_stime\n sched: fix sched_slice()\n sched_clock: prevent scd-\u003eclock from moving backwards, take #2\n sched: sched.c declare variables before they get used\n" }, { "commit": "e3d5a27d5862b6425d0879272e24abecf7245105", "tree": "c8a873e926d4768ae2ecac50c46c5121c8472876", "parents": [ "af9379c7121d5543722c00bbd1adf7dcaa0b6448" ], "author": { "name": "Paul Mackerras", "email": "paulus@samba.org", "time": "Tue Jan 06 14:41:02 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:13 2009 -0800" }, "message": "Allow times and time system calls to return small negative values\n\nAt the moment, the times() system call will appear to fail for a period\nshortly after boot, while the value it want to return is between -4095 and\n-1. The same thing will also happen for the time() system call on 32-bit\nplatforms some time in 2106 or so.\n\nOn some platforms, such as x86, this is unavoidable because of the system\ncall ABI, but other platforms such as powerpc have a separate error\nindication from the return value, so system calls can in fact return small\nnegative values without indicating an error. On those platforms,\nforce_successful_syscall_return() provides a way to indicate that the\nsystem call return value should not be treated as an error even if it is\nin the range which would normally be taken as a negative error number.\n\nThis adds a force_successful_syscall_return() call to the time() and\ntimes() system calls plus their 32-bit compat versions, so that they don\u0027t\nerroneously indicate an error on those platforms whose system call ABI has\na separate error indication. This will not affect anything on other\nplatforms.\n\nJoakim Tjernlund added the fix for time() and the compat versions of\ntime() and times(), after I did the fix for times().\n\nSigned-off-by: Joakim Tjernlund \u003cJoakim.Tjernlund@transmode.se\u003e\nSigned-off-by: Paul Mackerras \u003cpaulus@samba.org\u003e\nAcked-by: David S. Miller \u003cdavem@davemloft.net\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8916edef5888c5d8fe283714416a9ca95b4c3431", "tree": "5a46ef3616ce5cc869c6ba39e342cd71b390f313", "parents": [ "0a582440ff546e2c6610d1acec325e91b4efd313" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Sun Jan 04 05:40:37 2009 +0900" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Jan 04 14:04:00 2009 +0100" }, "message": "getrusage: RUSAGE_THREAD should return ru_utime and ru_stime\n\nImpact: task stats regression fix\n\nOriginal getrusage(RUSAGE_THREAD) implementation can return ru_utime and\nru_stime. But commit \"f06febc: timers: fix itimer/many thread hang\" broke it.\n\nthis patch restores it.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "5f34fe1cfc1bdd8b4711bbe37421fba4ed0d1ed4", "tree": "85b21c8bb0e53005bd970d648ca093acfd0584a3", "parents": [ "eca1bf5b4fab56d2feb1572d34d59fcd92ea7df3", "6638101c1124c19c8a65b1645e4ecd09e0572f3e" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Dec 30 16:10:19 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Dec 30 16:10:19 2008 -0800" }, "message": "Merge branch \u0027core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (63 commits)\n stacktrace: provide save_stack_trace_tsk() weak alias\n rcu: provide RCU options on non-preempt architectures too\n printk: fix discarding message when recursion_bug\n futex: clean up futex_(un)lock_pi fault handling\n \"Tree RCU\": scalable classic RCU implementation\n futex: rename field in futex_q to clarify single waiter semantics\n x86/swiotlb: add default swiotlb_arch_range_needs_mapping\n x86/swiotlb: add default phys\u003c-\u003ebus conversion\n x86: unify pci iommu setup and allow swiotlb to compile for 32 bit\n x86: add swiotlb allocation functions\n swiotlb: consolidate swiotlb info message printing\n swiotlb: support bouncing of HighMem pages\n swiotlb: factor out copy to/from device\n swiotlb: add arch hook to force mapping\n swiotlb: allow architectures to override phys\u003c-\u003ebus\u003c-\u003ephys conversions\n swiotlb: add comment where we handle the overflow of a dma mask on 32 bit\n rcu: fix rcutorture behavior during reboot\n resources: skip sanity check of busy resources\n swiotlb: move some definitions to header\n swiotlb: allow architectures to override swiotlb pool allocation\n ...\n\nFix up trivial conflicts in\n arch/x86/kernel/Makefile\n arch/x86/mm/init_32.c\n include/linux/hardirq.h\nas per Ingo\u0027s suggestions.\n" }, { "commit": "e1df957670aef74ffd9a4ad93e6d2c90bf6b4845", "tree": "bca1fcfef55b3e3e82c9a822b4ac6428fce2b419", "parents": [ "2b583d8bc8d7105b58d7481a4a0ceb718dac49c6", "3c92ec8ae91ecf59d88c798301833d7cf83f2179" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Dec 29 09:45:15 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Dec 29 09:45:15 2008 +0100" }, "message": "Merge branch \u0027linus\u0027 into perfcounters/core\n\nConflicts:\n\tfs/exec.c\n\tinclude/linux/init_task.h\n\nSimple context conflicts.\n" }, { "commit": "1d1c7ddbfab358445a542715551301b7fc363e28", "tree": "d4421834d109b206f39c2019ea039fd42ed22e1d", "parents": [ "bae43c9945ebeef15e7952e317efb02393d3bfc7" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Dec 11 14:59:31 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Dec 11 15:45:55 2008 +0100" }, "message": "perf counters: add prctl interface to disable/enable counters\n\nAdd a way for self-monitoring tasks to disable/enable counters summarily,\nvia a prctl:\n\n\tPR_TASK_PERF_COUNTERS_DISABLE\t\t31\n\tPR_TASK_PERF_COUNTERS_ENABLE\t\t32\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "18b6e0414e42d95183f07d8177e3ff0241abd825", "tree": "91ca2f2d442055e31eb7bb551bf7060f3f4c4cc7", "parents": [ "9789cfe22e5d7bc10cad841a4ea96ecedb34b267" ], "author": { "name": "Serge Hallyn", "email": "serue@us.ibm.com", "time": "Wed Oct 15 16:38:45 2008 -0500" }, "committer": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Mon Nov 24 18:57:41 2008 -0500" }, "message": "User namespaces: set of cleanups (v2)\n\nThe user_ns is moved from nsproxy to user_struct, so that a struct\ncred by itself is sufficient to determine access (which it otherwise\nwould not be). Corresponding ecryptfs fixes (by David Howells) are\nhere as well.\n\nFix refcounting. The following rules now apply:\n 1. The task pins the user struct.\n 2. The user struct pins its user namespace.\n 3. The user namespace pins the struct user which created it.\n\nUser namespaces are cloned during copy_creds(). Unsharing a new user_ns\nis no longer possible. (We could re-add that, but it\u0027ll cause code\nduplication and doesn\u0027t seem useful if PAM doesn\u0027t need to clone user\nnamespaces).\n\nWhen a user namespace is created, its first user (uid 0) gets empty\nkeyrings and a clean group_info.\n\nThis incorporates a previous patch by David Howells. Here\nis his original patch description:\n\n\u003eI suggest adding the attached incremental patch. It makes the following\n\u003echanges:\n\u003e\n\u003e (1) Provides a current_user_ns() macro to wrap accesses to current\u0027s user\n\u003e namespace.\n\u003e\n\u003e (2) Fixes eCryptFS.\n\u003e\n\u003e (3) Renames create_new_userns() to create_user_ns() to be more consistent\n\u003e with the other associated functions and because the \u0027new\u0027 in the name is\n\u003e superfluous.\n\u003e\n\u003e (4) Moves the argument and permission checks made for CLONE_NEWUSER to the\n\u003e beginning of do_fork() so that they\u0027re done prior to making any attempts\n\u003e at allocation.\n\u003e\n\u003e (5) Calls create_user_ns() after prepare_creds(), and gives it the new creds\n\u003e to fill in rather than have it return the new root user. I don\u0027t imagine\n\u003e the new root user being used for anything other than filling in a cred\n\u003e struct.\n\u003e\n\u003e This also permits me to get rid of a get_uid() and a free_uid(), as the\n\u003e reference the creds were holding on the old user_struct can just be\n\u003e transferred to the new namespace\u0027s creator pointer.\n\u003e\n\u003e (6) Makes create_user_ns() reset the UIDs and GIDs of the creds under\n\u003e preparation rather than doing it in copy_creds().\n\u003e\n\u003eDavid\n\n\u003eSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\n\nChangelog:\n\tOct 20: integrate dhowells comments\n\t\t1. leave thread_keyring alone\n\t\t2. use current_user_ns() in set_user()\n\nSigned-off-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\n" }, { "commit": "2b5fe6de58276d0b5a7c884d5dbfc300ca47db78", "tree": "02cc368e46a795bd2c0162d278f9c5549f4e1e5a", "parents": [ "ce394471d13bf071939a9a0b48c64c297676d233" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Nov 17 15:40:08 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Nov 17 16:55:55 2008 +0100" }, "message": "thread_group_cputime: move a couple of callsites outside of -\u003esiglock\n\nImpact: relax the locking of cpu-time accounting calls\n\n-\u003esiglock buys nothing for thread_group_cputime() in do_sys_times() and\nwait_task_zombie() (which btw takes the unrelated parent\u0027s -\u003esiglock).\n\nActually I think do_sys_times() doesn\u0027t need -\u003esiglock at all.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "d84f4f992cbd76e8f39c488cf0c5d123843923b1", "tree": "fc4a0349c42995715b93d0f7a3c78e9ea9b3f36e", "parents": [ "745ca2475a6ac596e3d8d37c2759c0fbe2586227" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Nov 14 10:39:23 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 10:39:23 2008 +1100" }, "message": "CRED: Inaugurate COW credentials\n\nInaugurate copy-on-write credentials management. This uses RCU to manage the\ncredentials pointer in the task_struct with respect to accesses by other tasks.\nA process may only modify its own credentials, and so does not need locking to\naccess or modify its own credentials.\n\nA mutex (cred_replace_mutex) is added to the task_struct to control the effect\nof PTRACE_ATTACHED on credential calculations, particularly with respect to\nexecve().\n\nWith this patch, the contents of an active credentials struct may not be\nchanged directly; rather a new set of credentials must be prepared, modified\nand committed using something like the following sequence of events:\n\n\tstruct cred *new \u003d prepare_creds();\n\tint ret \u003d blah(new);\n\tif (ret \u003c 0) {\n\t\tabort_creds(new);\n\t\treturn ret;\n\t}\n\treturn commit_creds(new);\n\nThere are some exceptions to this rule: the keyrings pointed to by the active\ncredentials may be instantiated - keyrings violate the COW rule as managing\nCOW keyrings is tricky, given that it is possible for a task to directly alter\nthe keys in a keyring in use by another task.\n\nTo help enforce this, various pointers to sets of credentials, such as those in\nthe task_struct, are declared const. The purpose of this is compile-time\ndiscouragement of altering credentials through those pointers. Once a set of\ncredentials has been made public through one of these pointers, it may not be\nmodified, except under special circumstances:\n\n (1) Its reference count may incremented and decremented.\n\n (2) The keyrings to which it points may be modified, but not replaced.\n\nThe only safe way to modify anything else is to create a replacement and commit\nusing the functions described in Documentation/credentials.txt (which will be\nadded by a later patch).\n\nThis patch and the preceding patches have been tested with the LTP SELinux\ntestsuite.\n\nThis patch makes several logical sets of alteration:\n\n (1) execve().\n\n This now prepares and commits credentials in various places in the\n security code rather than altering the current creds directly.\n\n (2) Temporary credential overrides.\n\n do_coredump() and sys_faccessat() now prepare their own credentials and\n temporarily override the ones currently on the acting thread, whilst\n preventing interference from other threads by holding cred_replace_mutex\n on the thread being dumped.\n\n This will be replaced in a future patch by something that hands down the\n credentials directly to the functions being called, rather than altering\n the task\u0027s objective credentials.\n\n (3) LSM interface.\n\n A number of functions have been changed, added or removed:\n\n (*) security_capset_check(), -\u003ecapset_check()\n (*) security_capset_set(), -\u003ecapset_set()\n\n \t Removed in favour of security_capset().\n\n (*) security_capset(), -\u003ecapset()\n\n \t New. This is passed a pointer to the new creds, a pointer to the old\n \t creds and the proposed capability sets. It should fill in the new\n \t creds or return an error. All pointers, barring the pointer to the\n \t new creds, are now const.\n\n (*) security_bprm_apply_creds(), -\u003ebprm_apply_creds()\n\n \t Changed; now returns a value, which will cause the process to be\n \t killed if it\u0027s an error.\n\n (*) security_task_alloc(), -\u003etask_alloc_security()\n\n \t Removed in favour of security_prepare_creds().\n\n (*) security_cred_free(), -\u003ecred_free()\n\n \t New. Free security data attached to cred-\u003esecurity.\n\n (*) security_prepare_creds(), -\u003ecred_prepare()\n\n \t New. Duplicate any security data attached to cred-\u003esecurity.\n\n (*) security_commit_creds(), -\u003ecred_commit()\n\n \t New. Apply any security effects for the upcoming installation of new\n \t security by commit_creds().\n\n (*) security_task_post_setuid(), -\u003etask_post_setuid()\n\n \t Removed in favour of security_task_fix_setuid().\n\n (*) security_task_fix_setuid(), -\u003etask_fix_setuid()\n\n \t Fix up the proposed new credentials for setuid(). This is used by\n \t cap_set_fix_setuid() to implicitly adjust capabilities in line with\n \t setuid() changes. Changes are made to the new credentials, rather\n \t than the task itself as in security_task_post_setuid().\n\n (*) security_task_reparent_to_init(), -\u003etask_reparent_to_init()\n\n \t Removed. Instead the task being reparented to init is referred\n \t directly to init\u0027s credentials.\n\n\t NOTE! This results in the loss of some state: SELinux\u0027s osid no\n\t longer records the sid of the thread that forked it.\n\n (*) security_key_alloc(), -\u003ekey_alloc()\n (*) security_key_permission(), -\u003ekey_permission()\n\n \t Changed. These now take cred pointers rather than task pointers to\n \t refer to the security context.\n\n (4) sys_capset().\n\n This has been simplified and uses less locking. The LSM functions it\n calls have been merged.\n\n (5) reparent_to_kthreadd().\n\n This gives the current thread the same credentials as init by simply using\n commit_thread() to point that way.\n\n (6) __sigqueue_alloc() and switch_uid()\n\n __sigqueue_alloc() can\u0027t stop the target task from changing its creds\n beneath it, so this function gets a reference to the currently applicable\n user_struct which it then passes into the sigqueue struct it returns if\n successful.\n\n switch_uid() is now called from commit_creds(), and possibly should be\n folded into that. commit_creds() should take care of protecting\n __sigqueue_alloc().\n\n (7) [sg]et[ug]id() and co and [sg]et_current_groups.\n\n The set functions now all use prepare_creds(), commit_creds() and\n abort_creds() to build and check a new set of credentials before applying\n it.\n\n security_task_set[ug]id() is called inside the prepared section. This\n guarantees that nothing else will affect the creds until we\u0027ve finished.\n\n The calling of set_dumpable() has been moved into commit_creds().\n\n Much of the functionality of set_user() has been moved into\n commit_creds().\n\n The get functions all simply access the data directly.\n\n (8) security_task_prctl() and cap_task_prctl().\n\n security_task_prctl() has been modified to return -ENOSYS if it doesn\u0027t\n want to handle a function, or otherwise return the return value directly\n rather than through an argument.\n\n Additionally, cap_task_prctl() now prepares a new set of credentials, even\n if it doesn\u0027t end up using it.\n\n (9) Keyrings.\n\n A number of changes have been made to the keyrings code:\n\n (a) switch_uid_keyring(), copy_keys(), exit_keys() and suid_keys() have\n \t all been dropped and built in to the credentials functions directly.\n \t They may want separating out again later.\n\n (b) key_alloc() and search_process_keyrings() now take a cred pointer\n \t rather than a task pointer to specify the security context.\n\n (c) copy_creds() gives a new thread within the same thread group a new\n \t thread keyring if its parent had one, otherwise it discards the thread\n \t keyring.\n\n (d) The authorisation key now points directly to the credentials to extend\n \t the search into rather pointing to the task that carries them.\n\n (e) Installing thread, process or session keyrings causes a new set of\n \t credentials to be created, even though it\u0027s not strictly necessary for\n \t process or session keyrings (they\u0027re shared).\n\n(10) Usermode helper.\n\n The usermode helper code now carries a cred struct pointer in its\n subprocess_info struct instead of a new session keyring pointer. This set\n of credentials is derived from init_cred and installed on the new process\n after it has been cloned.\n\n call_usermodehelper_setup() allocates the new credentials and\n call_usermodehelper_freeinfo() discards them if they haven\u0027t been used. A\n special cred function (prepare_usermodeinfo_creds()) is provided\n specifically for call_usermodehelper_setup() to call.\n\n call_usermodehelper_setkeys() adjusts the credentials to sport the\n supplied keyring as the new session keyring.\n\n(11) SELinux.\n\n SELinux has a number of changes, in addition to those to support the LSM\n interface changes mentioned above:\n\n (a) selinux_setprocattr() no longer does its check for whether the\n \t current ptracer can access processes with the new SID inside the lock\n \t that covers getting the ptracer\u0027s SID. Whilst this lock ensures that\n \t the check is done with the ptracer pinned, the result is only valid\n \t until the lock is released, so there\u0027s no point doing it inside the\n \t lock.\n\n(12) is_single_threaded().\n\n This function has been extracted from selinux_setprocattr() and put into\n a file of its own in the lib/ directory as join_session_keyring() now\n wants to use it too.\n\n The code in SELinux just checked to see whether a task shared mm_structs\n with other tasks (CLONE_VM), but that isn\u0027t good enough. We really want\n to know if they\u0027re part of the same thread group (CLONE_THREAD).\n\n(13) nfsd.\n\n The NFS server daemon now has to use the COW credentials to set the\n credentials it is going to use. It really needs to pass the credentials\n down to the functions it calls, but it can\u0027t do that until other patches\n in this series have been applied.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "c69e8d9c01db2adc503464993c358901c9af9de4", "tree": "bed94aaa9aeb7a7834d1c880f72b62a11a752c78", "parents": [ "86a264abe542cfececb4df129bc45a0338d8cdb9" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Nov 14 10:39:19 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 10:39:19 2008 +1100" }, "message": "CRED: Use RCU to access another task\u0027s creds and to release a task\u0027s own creds\n\nUse RCU to access another task\u0027s creds and to release a task\u0027s own creds.\nThis means that it will be possible for the credentials of a task to be\nreplaced without another task (a) requiring a full lock to read them, and (b)\nseeing deallocated memory.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "86a264abe542cfececb4df129bc45a0338d8cdb9", "tree": "30152f04ba847f311028d5ca697f864c16c7ebb3", "parents": [ "f1752eec6145c97163dbce62d17cf5d928e28a27" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Nov 14 10:39:18 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 10:39:18 2008 +1100" }, "message": "CRED: Wrap current-\u003ecred and a few other accessors\n\nWrap current-\u003ecred and a few other accessors to hide their actual\nimplementation.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "b6dff3ec5e116e3af6f537d4caedcad6b9e5082a", "tree": "9e76f972eb7ce9b84e0146c8e4126a3f86acb428", "parents": [ "15a2460ed0af7538ca8e6c610fe607a2cd9da142" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Nov 14 10:39:16 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 10:39:16 2008 +1100" }, "message": "CRED: Separate task security context from task_struct\n\nSeparate the task security context from task_struct. At this point, the\nsecurity data is temporarily embedded in the task_struct with two pointers\npointing to it.\n\nNote that the Alpha arch is altered as it refers to (E)UID and (E)GID in\nentry.S via asm-offsets.\n\nWith comment fixes Signed-off-by: Marc Dionne \u003cmarc.c.dionne@gmail.com\u003e\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "76aac0e9a17742e60d408be1a706e9aaad370891", "tree": "e873a000d9c96209726e0958e311f005c13b2ed5", "parents": [ "b103c59883f1ec6e4d548b25054608cb5724453c" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Nov 14 10:39:12 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 10:39:12 2008 +1100" }, "message": "CRED: Wrap task credential accesses in the core kernel\n\nWrap access to task credentials so that they can be separated more easily from\nthe task_struct during the introduction of COW creds.\n\nChange most current-\u003e(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().\n\nChange some task-\u003ee?[ug]id to task_e?[ug]id(). In some places it makes more\nsense to use RCU directly rather than a convenient wrapper; these will be\naddressed by later patches.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nReviewed-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: linux-audit@redhat.com\nCc: containers@lists.linux-foundation.org\nCc: linux-mm@kvack.org\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "268a3dcfea2077fca60d3715caa5c96f9b5e6ea7", "tree": "c2232774508424e677e27f296090a68c775e4669", "parents": [ "c4bd822e7b12a9008241d76db45b665f2fef180c", "592aa999d6a272856c9bfbdaac0cfba1bb37c24c" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Wed Oct 22 09:48:06 2008 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Wed Oct 22 09:48:06 2008 +0200" }, "message": "Merge branch \u0027timers/range-hrtimers\u0027 into v28-range-hrtimers-for-linus-v2\n\nConflicts:\n\n\tkernel/time/tick-sched.c\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "c465a76af658b443075d6efee1c3131257643020", "tree": "63c28c9fab02dedec7f03cee4a3ef7fe4dc1c072", "parents": [ "2d42244ae71d6c7b0884b5664cf2eda30fb2ae68", "1b02469088ac7a13d7e622b618b7410d0f1ce5ec", "fb02fbc14d17837b4b7b02dbb36142c16a7bf208", "d40e944c25fb4642adb2a4c580a48218a9f3f824", "1508487e7f16d992ad23cabd3712563ff912f413", "322acf6585f3c4e82ee32a246b0483ca0f6ad3f4" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Mon Oct 20 13:14:06 2008 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Mon Oct 20 13:14:06 2008 +0200" }, "message": "Merge branches \u0027timers/clocksource\u0027, \u0027timers/hrtimers\u0027, \u0027timers/nohz\u0027, \u0027timers/ntp\u0027, \u0027timers/posixtimers\u0027 and \u0027timers/debug\u0027 into v28-timers-for-linus\n" }, { "commit": "651dab4264e4ba0e563f5ff56f748127246e9065", "tree": "016630974bdcb00fe529b673f96d389e0fd6dc94", "parents": [ "40b8606253552109815786e5d4b0de98782d31f5", "2e532d68a2b3e2aa6b19731501222069735c741c" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Fri Oct 17 09:20:26 2008 -0700" }, "committer": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Fri Oct 17 09:20:26 2008 -0700" }, "message": "Merge commit \u0027linus/master\u0027 into merge-linus\n\nConflicts:\n\n\tarch/x86/kvm/i8254.c\n" }, { "commit": "9679e4dd628743b9ef4375d60ae69923c3766173", "tree": "03d491b6dbcc66079d4015c585f156fc4d94c2ea", "parents": [ "87988815073918134c0dae059cf247a4472d78ed" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Wed Oct 15 22:01:51 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 16 11:21:31 2008 -0700" }, "message": "kernel/sys.c: improve code generation\n\nutsname() is quite expensive to calculate. Cache it in a local.\n\n text data bss dec hex filename\nbefore: 11136 720 16 11872 2e60 kernel/sys.o\nafter: 11096 720 16 11832 2e38 kernel/sys.o\n\nAcked-by: Vegard Nossum \u003cvegard.nossum@gmail.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nAcked-by: \"Serge E. Hallyn\" \u003cserue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "87988815073918134c0dae059cf247a4472d78ed", "tree": "dbab51efdb95de92bbfb585dd1a90c49061e7cdf", "parents": [ "929f37cb3c3e0f4d23d7106693b7067cf72f4dbc" ], "author": { "name": "Vegard Nossum", "email": "vegard.nossum@gmail.com", "time": "Wed Oct 15 22:01:51 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 16 11:21:31 2008 -0700" }, "message": "utsname: completely overwrite prior information\n\nOn sethostname() and setdomainname(), previous information may be retained\nif it was longer than than the new hostname/domainname.\n\nThis can be demonstrated trivially by calling sethostname() first with a\nlong name, then with a short name, and then calling uname() to retrieve\nthe full buffer that contains the hostname (and possibly parts of the old\nhostname), one just has to look past the terminating zero.\n\nI don\u0027t know if we should really care that much (hence the RFC); the only\nscenarios I can possibly think of is administrator putting something\nsensitive in the hostname (or domain name) by accident, and changing it\nback will not undo the mistake entirely, though it\u0027s not like we can\nrecover gracefully from \"rm -rf /\" either... The other scenario is\nnamespaces (CLONE_NEWUTS) where some information may be unintentionally\n\"inherited\" from the previous namespace (a program wants to hide the\noriginal name and does clone + sethostname, but some information is still\nleft).\n\nI think the patch may be defended on grounds of the principle of least\nsurprise. But I am not adamant :-)\n\n(I guess the question now is whether userspace should be able to\nwrite embedded NULs into the buffer or not...)\n\nAt least the observation has been made and the patch has been presented.\n\nSigned-off-by: Vegard Nossum \u003cvegard.nossum@gmail.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: \"Serge E. Hallyn\" \u003cserue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0c2d64fb6cae9aae480f6a46cfe79f8d7d48b59f", "tree": "f0080c63a78a021cc3404e12e205e3b82e982427", "parents": [ "b4236f81f2347096df650fb072f50d67bb6066a2" ], "author": { "name": "Adam Tkac", "email": "vonsch@gmail.com", "time": "Wed Oct 15 22:01:45 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 16 11:21:31 2008 -0700" }, "message": "rlimit: permit setting RLIMIT_NOFILE to RLIM_INFINITY\n\nWhen a process wants to set the limit of open files to RLIM_INFINITY it\ngets EPERM even if it has CAP_SYS_RESOURCE capability.\n\nFor example, BIND does:\n\n...\n#elif defined(NR_OPEN) \u0026\u0026 defined(__linux__)\n /*\n * Some Linux kernels don\u0027t accept RLIM_INFINIT; the maximum\n * possible value is the NR_OPEN defined in linux/fs.h.\n */\n if (resource \u003d\u003d isc_resource_openfiles \u0026\u0026 rlim_value \u003d\u003d RLIM_INFINITY) {\n rl.rlim_cur \u003d rl.rlim_max \u003d NR_OPEN;\n unixresult \u003d setrlimit(unixresource, \u0026rl);\n if (unixresult \u003d\u003d 0)\n return (ISC_R_SUCCESS);\n }\n#elif ...\n\nIf we allow setting RLIMIT_NOFILE to RLIM_INFINITY we increase portability\n- you don\u0027t have to check if OS is linux and then use different schema for\nlimits.\n\nThe spec says \"Specifying RLIM_INFINITY as any resource limit value on a\nsuccessful call to setrlimit() shall inhibit enforcement of that resource\nlimit.\" and we\u0027re presently not doing that.\n\nCc: Michael Kerrisk \u003cmtk.manpages@googlemail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9c9f4ded90a59eee84e15f5fd38c03d60184e112", "tree": "925a7f7c30136477b3f8551123fd86b355fd60fb", "parents": [ "348eb12e5598be97400c749d3d93a71856ae0b2b" ], "author": { "name": "Alan Cox", "email": "alan@redhat.com", "time": "Mon Oct 13 10:37:26 2008 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 13 09:51:40 2008 -0700" }, "message": "tty: Add a kref count\n\nIntroduce a kref to the tty structure and use it to protect the tty-\u003esignal\ntty references. For now we don\u0027t introduce it for anything else.\n\nSigned-off-by: Alan Cox \u003calan@redhat.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f06febc96ba8e0af80bcc3eaec0a109e88275fac", "tree": "46dba9432ef25d2eae9434ff2df638c7a268c0f1", "parents": [ "6bfb09a1005193be5c81ebac9f3ef85210142650" ], "author": { "name": "Frank Mayhar", "email": "fmayhar@google.com", "time": "Fri Sep 12 09:54:39 2008 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Sep 14 16:25:35 2008 +0200" }, "message": "timers: fix itimer/many thread hang\n\nOverview\n\nThis patch reworks the handling of POSIX CPU timers, including the\nITIMER_PROF, ITIMER_VIRT timers and rlimit handling. It was put together\nwith the help of Roland McGrath, the owner and original writer of this code.\n\nThe problem we ran into, and the reason for this rework, has to do with using\na profiling timer in a process with a large number of threads. It appears\nthat the performance of the old implementation of run_posix_cpu_timers() was\nat least O(n*3) (where \"n\" is the number of threads in a process) or worse.\nEverything is fine with an increasing number of threads until the time taken\nfor that routine to run becomes the same as or greater than the tick time, at\nwhich point things degrade rather quickly.\n\nThis patch fixes bug 9906, \"Weird hang with NPTL and SIGPROF.\"\n\nCode Changes\n\nThis rework corrects the implementation of run_posix_cpu_timers() to make it\nrun in constant time for a particular machine. (Performance may vary between\none machine and another depending upon whether the kernel is built as single-\nor multiprocessor and, in the latter case, depending upon the number of\nrunning processors.) To do this, at each tick we now update fields in\nsignal_struct as well as task_struct. The run_posix_cpu_timers() function\nuses those fields to make its decisions.\n\nWe define a new structure, \"task_cputime,\" to contain user, system and\nscheduler times and use these in appropriate places:\n\nstruct task_cputime {\n\tcputime_t utime;\n\tcputime_t stime;\n\tunsigned long long sum_exec_runtime;\n};\n\nThis is included in the structure \"thread_group_cputime,\" which is a new\nsubstructure of signal_struct and which varies for uniprocessor versus\nmultiprocessor kernels. For uniprocessor kernels, it uses \"task_cputime\" as\na simple substructure, while for multiprocessor kernels it is a pointer:\n\nstruct thread_group_cputime {\n\tstruct task_cputime totals;\n};\n\nstruct thread_group_cputime {\n\tstruct task_cputime *totals;\n};\n\nWe also add a new task_cputime substructure directly to signal_struct, to\ncache the earliest expiration of process-wide timers, and task_cputime also\nreplaces the it_*_expires fields of task_struct (used for earliest expiration\nof thread timers). The \"thread_group_cputime\" structure contains process-wide\ntimers that are updated via account_user_time() and friends. In the non-SMP\ncase the structure is a simple aggregator; unfortunately in the SMP case that\nsimplicity was not achievable due to cache-line contention between CPUs (in\none measured case performance was actually _worse_ on a 16-cpu system than\nthe same test on a 4-cpu system, due to this contention). For SMP, the\nthread_group_cputime counters are maintained as a per-cpu structure allocated\nusing alloc_percpu(). The timer functions update only the timer field in\nthe structure corresponding to the running CPU, obtained using per_cpu_ptr().\n\nWe define a set of inline functions in sched.h that we use to maintain the\nthread_group_cputime structure and hide the differences between UP and SMP\nimplementations from the rest of the kernel. The thread_group_cputime_init()\nfunction initializes the thread_group_cputime structure for the given task.\nThe thread_group_cputime_alloc() is a no-op for UP; for SMP it calls the\nout-of-line function thread_group_cputime_alloc_smp() to allocate and fill\nin the per-cpu structures and fields. The thread_group_cputime_free()\nfunction, also a no-op for UP, in SMP frees the per-cpu structures. The\nthread_group_cputime_clone_thread() function (also a UP no-op) for SMP calls\nthread_group_cputime_alloc() if the per-cpu structures haven\u0027t yet been\nallocated. The thread_group_cputime() function fills the task_cputime\nstructure it is passed with the contents of the thread_group_cputime fields;\nin UP it\u0027s that simple but in SMP it must also safely check that tsk-\u003esignal\nis non-NULL (if it is it just uses the appropriate fields of task_struct) and,\nif so, sums the per-cpu values for each online CPU. Finally, the three\nfunctions account_group_user_time(), account_group_system_time() and\naccount_group_exec_runtime() are used by timer functions to update the\nrespective fields of the thread_group_cputime structure.\n\nNon-SMP operation is trivial and will not be mentioned further.\n\nThe per-cpu structure is always allocated when a task creates its first new\nthread, via a call to thread_group_cputime_clone_thread() from copy_signal().\nIt is freed at process exit via a call to thread_group_cputime_free() from\ncleanup_signal().\n\nAll functions that formerly summed utime/stime/sum_sched_runtime values from\nfrom all threads in the thread group now use thread_group_cputime() to\nsnapshot the values in the thread_group_cputime structure or the values in\nthe task structure itself if the per-cpu structure hasn\u0027t been allocated.\n\nFinally, the code in kernel/posix-cpu-timers.c has changed quite a bit.\nThe run_posix_cpu_timers() function has been split into a fast path and a\nslow path; the former safely checks whether there are any expired thread\ntimers and, if not, just returns, while the slow path does the heavy lifting.\nWith the dedicated thread group fields, timers are no longer \"rebalanced\" and\nthe process_timer_rebalance() function and related code has gone away. All\nsumming loops are gone and all code that used them now uses the\nthread_group_cputime() inline. When process-wide timers are set, the new\ntask_cputime structure in signal_struct is used to cache the earliest\nexpiration; this is checked in the fast path.\n\nPerformance\n\nThe fix appears not to add significant overhead to existing operations. It\ngenerally performs the same as the current code except in two cases, one in\nwhich it performs slightly worse (Case 5 below) and one in which it performs\nvery significantly better (Case 2 below). Overall it\u0027s a wash except in those\ntwo cases.\n\nI\u0027ve since done somewhat more involved testing on a dual-core Opteron system.\n\nCase 1: With no itimer running, for a test with 100,000 threads, the fixed\n\tkernel took 1428.5 seconds, 513 seconds more than the unfixed system,\n\tall of which was spent in the system. There were twice as many\n\tvoluntary context switches with the fix as without it.\n\nCase 2: With an itimer running at .01 second ticks and 4000 threads (the most\n\tan unmodified kernel can handle), the fixed kernel ran the test in\n\teight percent of the time (5.8 seconds as opposed to 70 seconds) and\n\thad better tick accuracy (.012 seconds per tick as opposed to .023\n\tseconds per tick).\n\nCase 3: A 4000-thread test with an initial timer tick of .01 second and an\n\tinterval of 10,000 seconds (i.e. a timer that ticks only once) had\n\tvery nearly the same performance in both cases: 6.3 seconds elapsed\n\tfor the fixed kernel versus 5.5 seconds for the unfixed kernel.\n\nWith fewer threads (eight in these tests), the Case 1 test ran in essentially\nthe same time on both the modified and unmodified kernels (5.2 seconds versus\n5.8 seconds). The Case 2 test ran in about the same time as well, 5.9 seconds\nversus 5.4 seconds but again with much better tick accuracy, .013 seconds per\ntick versus .025 seconds per tick for the unmodified kernel.\n\nSince the fix affected the rlimit code, I also tested soft and hard CPU limits.\n\nCase 4: With a hard CPU limit of 20 seconds and eight threads (and an itimer\n\trunning), the modified kernel was very slightly favored in that while\n\tit killed the process in 19.997 seconds of CPU time (5.002 seconds of\n\twall time), only .003 seconds of that was system time, the rest was\n\tuser time. The unmodified kernel killed the process in 20.001 seconds\n\tof CPU (5.014 seconds of wall time) of which .016 seconds was system\n\ttime. Really, though, the results were too close to call. The results\n\twere essentially the same with no itimer running.\n\nCase 5: With a soft limit of 20 seconds and a hard limit of 2000 seconds\n\t(where the hard limit would never be reached) and an itimer running,\n\tthe modified kernel exhibited worse tick accuracy than the unmodified\n\tkernel: .050 seconds/tick versus .028 seconds/tick. Otherwise,\n\tperformance was almost indistinguishable. With no itimer running this\n\ttest exhibited virtually identical behavior and times in both cases.\n\nIn times past I did some limited performance testing. those results are below.\n\nOn a four-cpu Opteron system without this fix, a sixteen-thread test executed\nin 3569.991 seconds, of which user was 3568.435s and system was 1.556s. On\nthe same system with the fix, user and elapsed time were about the same, but\nsystem time dropped to 0.007 seconds. Performance with eight, four and one\nthread were comparable. Interestingly, the timer ticks with the fix seemed\nmore accurate: The sixteen-thread test with the fix received 149543 ticks\nfor 0.024 seconds per tick, while the same test without the fix received 58720\nfor 0.061 seconds per tick. Both cases were configured for an interval of\n0.01 seconds. Again, the other tests were comparable. Each thread in this\ntest computed the primes up to 25,000,000.\n\nI also did a test with a large number of threads, 100,000 threads, which is\nimpossible without the fix. In this case each thread computed the primes only\nup to 10,000 (to make the runtime manageable). System time dominated, at\n1546.968 seconds out of a total 2176.906 seconds (giving a user time of\n629.938s). It received 147651 ticks for 0.015 seconds per tick, still quite\naccurate. There is obviously no comparable test without the fix.\n\nSigned-off-by: Frank Mayhar \u003cfmayhar@google.com\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nCc: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "6976675d94042fbd446231d1bd8b7de71a980ada", "tree": "2d2acebb8078dd373115ecbdac5423f7d4fa7d72", "parents": [ "654c8e0b1c623b156c5b92f28d914ab38c9c2c90" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Mon Sep 01 15:52:40 2008 -0700" }, "committer": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Fri Sep 05 21:35:30 2008 -0700" }, "message": "hrtimer: create a \"timer_slack\" field in the task struct\n\nWe want to be able to control the default \"rounding\" that is used by\nselect() and poll() and friends. This is a per process property\n(so that we can have a \"nice\" like program to start certain programs with\na looser or stricter rounding) that can be set/get via a prctl().\n\nFor this purpose, a field called \"timer_slack_ns\" is added to the task\nstruct. In addition, a field called \"default_timer_slack\"ns\" is added\nso that tasks easily can temporarily to a more/less accurate slack and then\nback to the default.\n\nThe default value of the slack is set to 50 usec; this is significantly less\nthan 2.6.27\u0027s average select() and poll() timing error but still allows\nthe kernel to group timers somewhat to preserve power behavior. Applications\nand admins can override this via the prctl()\n\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\n" }, { "commit": "2d70b68d42b5196a48ccb639e3797f097ef5bea3", "tree": "b3040706cd69e0e7bc6d846e08fd91a441b34310", "parents": [ "141d87e7debe3334018e46859c7565c44cebda65" ], "author": { "name": "Ken Chen", "email": "kenchen@google.com", "time": "Wed Aug 20 14:09:17 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Aug 20 15:40:32 2008 -0700" }, "message": "fix setpriority(PRIO_PGRP) thread iterator breakage\n\nWhen user calls sys_setpriority(PRIO_PGRP ...) on a NPTL style multi-LWP\nprocess, only the task leader of the process is affected, all other\nsibling LWP threads didn\u0027t receive the setting. The problem was that the\niterator used in sys_setpriority() only iteartes over one task for each\nprocess, ignoring all other sibling thread.\n\nIntroduce a new macro do_each_pid_thread / while_each_pid_thread to walk\neach thread of a process. Convert 4 call sites in {set/get}priority and\nioprio_{set/get}.\n\nSigned-off-by: Ken Chen \u003ckenchen@google.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ca195b7f6da3d5dde0bb85a7c322d7de73352653", "tree": "1f8a31634ddc2bd4ba8a5fc081b39babab62323b", "parents": [ "fb45daa69d287b394eca1619b3fadff7c0215c71" ], "author": { "name": "Huang Ying", "email": "ying.huang@intel.com", "time": "Fri Aug 15 00:40:24 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Aug 15 08:35:42 2008 -0700" }, "message": "kexec jump: remove duplication of kexec_restart_prepare()\n\nCall kernel_restart_prepare() in kernel_kexec() instead of duplicating the\ncode.\n\nSigned-off-by: Huang Ying \u003cying.huang@intel.com\u003e\nAcked-by: Pavel Machek \u003cpavel@suse.cz\u003e\nAcked-by: Vivek Goyal \u003cvgoyal@redhat.com\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Vivek Goyal \u003cvgoyal@redhat.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3ab83521378268044a448113c6aa9a9e245f4d2f", "tree": "e9e8496577e4b2e994edf204e9a8ae7c026eec95", "parents": [ "7fccf0326536c1b245b98740d489abb9aab69a12" ], "author": { "name": "Huang Ying", "email": "ying.huang@intel.com", "time": "Fri Jul 25 19:45:07 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jul 26 12:00:04 2008 -0700" }, "message": "kexec jump\n\nThis patch provides an enhancement to kexec/kdump. It implements the\nfollowing features:\n\n- Backup/restore memory used by the original kernel before/after\n kexec.\n\n- Save/restore CPU state before/after kexec.\n\nThe features of this patch can be used as a general method to call program in\nphysical mode (paging turning off). This can be used to call BIOS code under\nLinux.\n\nkexec-tools needs to be patched to support kexec jump. The patches and\nthe precompiled kexec can be download from the following URL:\n\n source: http://khibernation.sourceforge.net/download/release_v10/kexec-tools/kexec-tools-src_git_kh10.tar.bz2\n patches: http://khibernation.sourceforge.net/download/release_v10/kexec-tools/kexec-tools-patches_git_kh10.tar.bz2\n binary: http://khibernation.sourceforge.net/download/release_v10/kexec-tools/kexec_git_kh10\n\nUsage example of calling some physical mode code and return:\n\n1. Compile and install patched kernel with following options selected:\n\nCONFIG_X86_32\u003dy\nCONFIG_KEXEC\u003dy\nCONFIG_PM\u003dy\nCONFIG_KEXEC_JUMP\u003dy\n\n2. Build patched kexec-tool or download the pre-built one.\n\n3. Build some physical mode executable named such as \"phy_mode\"\n\n4. Boot kernel compiled in step 1.\n\n5. Load physical mode executable with /sbin/kexec. The shell command\n line can be as follow:\n\n /sbin/kexec --load-preserve-context --args-none phy_mode\n\n6. Call physical mode executable with following shell command line:\n\n /sbin/kexec -e\n\nImplementation point:\n\nTo support jumping without reserving memory. One shadow backup page (source\npage) is allocated for each page used by kexeced code image (destination\npage). When do kexec_load, the image of kexeced code is loaded into source\npages, and before executing, the destination pages and the source pages are\nswapped, so the contents of destination pages are backupped. Before jumping\nto the kexeced code image and after jumping back to the original kernel, the\ndestination pages and the source pages are swapped too.\n\nC ABI (calling convention) is used as communication protocol between\nkernel and called code.\n\nA flag named KEXEC_PRESERVE_CONTEXT for sys_kexec_load is added to\nindicate that the loaded kernel image is used for jumping back.\n\nNow, only the i386 architecture is supported.\n\nSigned-off-by: Huang Ying \u003cying.huang@intel.com\u003e\nAcked-by: Vivek Goyal \u003cvgoyal@redhat.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: Nigel Cunningham \u003cnigel@nigel.suspend2.net\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7394f0f6c0baab650ea9194cb1be847df646fb57", "tree": "dac44a6ddeac45d0ac604053b798291e68d2a70a", "parents": [ "a89cc1959d0ea5f36bf7421dc97b34f03809637d" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Fri Jul 25 01:48:40 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:45 2008 -0700" }, "message": "unexport uts_sem\n\nWith the removal of the Solaris binary emulation the export of\nuts_sem became unused.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nAcked-by: David S. Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ac331d158e198d2a91a5b0a3ec4ca9991fdb57af", "tree": "b0921e2bc8e59d5df2c554c41c3b9f04e05d6d7c", "parents": [ "f557d0996a6f9c06912528ea85e1dba0fb7d485f" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Fri Jul 25 01:45:38 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:28 2008 -0700" }, "message": "call_usermodehelper(): increase reliability\n\nPresently call_usermodehelper_setup() uses GFP_ATOMIC. but it can return\nNULL _very_ easily.\n\nGFP_ATOMIC is needed only when we can\u0027t sleep. and, GFP_KERNEL is robust\nand better.\n\nthus, I add gfp_mask argument to call_usermodehelper_setup().\n\nSo, its callers pass the gfp_t as below:\n\ncall_usermodehelper() and call_usermodehelper_keys():\n\tdepend on \u0027wait\u0027 argument.\ncall_usermodehelper_pipe():\n\talways GFP_KERNEL because always run under process context.\norderly_poweroff():\n\tpass to GFP_ATOMIC because may run under interrupt context.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: \"Paul Menage\" \u003cmenage@google.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Jeremy Fitzhardinge \u003cjeremy@xensource.com\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7b26655f6208fdefa9ab0adc016116324f8d4ba8", "tree": "07f081c52da72a9730861c74ebea86ea48d402e2", "parents": [ "f99c90094bffbe1cf38ef66f198a808c14a02d56" ], "author": { "name": "Shi Weihua", "email": "shiwh@cn.fujitsu.com", "time": "Fri May 23 13:04:59 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat May 24 09:56:13 2008 -0700" }, "message": "sys_prctl(): fix return of uninitialized value\n\nIf none of the switch cases match, the PR_SET_PDEATHSIG and\nPR_SET_DUMPABLE cases of the switch statement will never write to local\nvariable `error\u0027.\n\nSigned-off-by: Shi Weihua \u003cshiwh@cn.fujitsu.com\u003e\nCc: Andrew G. Morgan \u003cmorgan@kernel.org\u003e\nAcked-by: \"Serge E. Hallyn\" \u003cserue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "12a3de0a965826096d8adc593bcf4392a7d5b459", "tree": "764d69c2973e67cb3ae58bec02e29cd616c40f90", "parents": [ "1dd768c0815334d2319d6377f0750ace075b6142" ], "author": { "name": "Oleg Nesterov", "email": "oleg@tv-sign.ru", "time": "Wed Apr 30 00:54:29 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:49 2008 -0700" }, "message": "pids: sys_getpgid: fix unsafe *pid usage, s/tasklist/rcu/\n\n1. sys_getpgid() needs rcu_read_lock() to derive the pgrp _nr, even if\n the task is current, otherwise we can race with another thread which\n does sys_setpgid().\n\n2. Use rcu_read_lock() instead of tasklist_lock when pid !\u003d 0, make sure\n that we don\u0027t use the NULL pid if the task exits right after successful\n find_task_by_vpid().\n\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" } ], "next": "1dd768c0815334d2319d6377f0750ace075b6142" }