)]}' { "log": [ { "commit": "4528fd0595847c2078b59f24800e751c2d6b7e41", "tree": "0be4aca79bc9b6709d4762f43ae53e2589931a85", "parents": [ "ef2b9b054580ef835078d8aa411bd06542cd5c1c" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Feb 02 13:44:10 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Feb 02 18:11:22 2010 -0800" }, "message": "cgroups: fix to return errno in a failure path\n\nIn cgroup_create(), if alloc_css_id() returns failure, the errno is not\npropagated to userspace, so mkdir will fail silently.\n\nTo trigger this bug, we mount blkio (or memory subsystem), and create more\nthen 65534 cgroups. (The number of cgroups is limited to 65535 if a\nsubsystem has use_id \u003d\u003d 1)\n\n # mount -t cgroup -o blkio xxx /mnt\n # for ((i \u003d 0; i \u003c 65534; i++)); do mkdir /mnt/$i; done\n # mkdir /mnt/65534\n (should return ENOSPC)\n #\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "bd4f490a079730aadfaf9a728303ea0135c01945", "tree": "7de1396233a18a8da5e4b204415a8859154c79bc", "parents": [ "272a897904b9a067550f5b8e812036b65180418f" ], "author": { "name": "Dave Anderson", "email": "anderson@redhat.com", "time": "Fri Jan 08 14:42:50 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jan 11 09:34:05 2010 -0800" }, "message": "cgroups: fix 2.6.32 regression causing BUG_ON() in cgroup_diput()\n\nThe LTP cgroup test suite generates a \"kernel BUG at kernel/cgroup.c:790!\"\nhere in cgroup_diput():\n\n /*\n * if we\u0027re getting rid of the cgroup, refcount should ensure\n * that there are no pidlists left.\n */\n BUG_ON(!list_empty(\u0026cgrp-\u003epidlists));\n\nThe cgroup pidlist rework in 2.6.32 generates the BUG_ON, which is caused\nwhen pidlist_array_load() calls cgroup_pidlist_find():\n\n(1) if a matching cgroup_pidlist is found, it down_write\u0027s the mutex of the\n pre-existing cgroup_pidlist, and increments its use_count.\n(2) if no matching cgroup_pidlist is found, then a new one is allocated, it\n down_write\u0027s its mutex, and the use_count is set to 0.\n(3) the matching, or new, cgroup_pidlist gets returned back to pidlist_array_load(),\n which increments its use_count -- regardless whether new or pre-existing --\n and up_write\u0027s the mutex.\n\nSo if a matching list is ever encountered by cgroup_pidlist_find() during\nthe life of a cgroup directory, it results in an inflated use_count value,\npreventing it from ever getting released by cgroup_release_pid_array().\nThen if the directory is subsequently removed, cgroup_diput() hits the\nBUG_ON() when it finds that the directory\u0027s cgroup is still populated with\na pidlist.\n\nThe patch simply removes the use_count increment when a matching pidlist\nis found by cgroup_pidlist_find(), because it gets bumped by the calling\npidlist_array_load() function while still protected by the list\u0027s mutex.\n\nSigned-off-by: Dave Anderson \u003canderson@redhat.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Ben Blum \u003cbblum@andrew.cmu.edu\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "478988d3b28e98a31e0cfe24e011e28ba0f3cf0d", "tree": "0f14f3a2f242258d2d7a0ddb3025c308f666b7ee", "parents": [ "58355c7876a0754377c37c8af948b4cd423410e2" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Oct 26 16:49:36 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 29 07:39:25 2009 -0700" }, "message": "cgroup: fix strstrip() misuse\n\ncgroup_write_X64() and cgroup_write_string() ignore the return value of\nstrstrip(). it makes small inconsistent behavior.\n\nexample:\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\n # cd /mnt/cgroup/hoge\n # cat memory.swappiness\n 60\n # echo \"59 \" \u003e memory.swappiness\n # cat memory.swappiness\n 59\n # echo \" 58\" \u003e memory.swappiness\n bash: echo: write error: Invalid argument\n\nThis patch fixes it.\n\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nSigned-off-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": "3dece8347df6a16239fab10dadb370854f1c969c", "tree": "23a93cdb0dfacd4b89b42c192a6247be84d105bf", "parents": [ "26251eaf98e26dc2ce2dc26d63bc502700760704" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Oct 01 15:44:09 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 01 16:11:12 2009 -0700" }, "message": "cgroup: catch bad css refcnt at css_put\n\n__css_put() doesn\u0027t check a bug as refcnt goes to minus.\nI think it should be caught. This patch adds a check for it.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "828c09509b9695271bcbdc53e9fc9a6a737148d2", "tree": "072ffad6f02db7bf4095e07e2b90247cfa042998", "parents": [ "1c4115e595dec42aa0e81ba47ef46e35b34ed428" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Thu Oct 01 15:43:56 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 01 16:11:11 2009 -0700" }, "message": "const: constify remaining file_operations\n\n[akpm@linux-foundation.org: fix KVM]\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nAcked-by: Mike Frysinger \u003cvapier@gentoo.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "be367d09927023d081f9199665c8500f69f14d22", "tree": "f0c5b9da037506da3c5890cf11b51b39a7d3c427", "parents": [ "c378369d8b4fa516ff2b1e79c3eded4e0e955ebb" ], "author": { "name": "Ben Blum", "email": "bblum@google.com", "time": "Wed Sep 23 15:56:31 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:58 2009 -0700" }, "message": "cgroups: let ss-\u003ecan_attach and ss-\u003eattach do whole threadgroups at a time\n\nAlter the ss-\u003ecan_attach and ss-\u003eattach functions to be able to deal with\na whole threadgroup at a time, for use in cgroup_attach_proc. (This is a\npre-patch to cgroup-procs-writable.patch.)\n\nCurrently, new mode of the attach function can only tell the subsystem\nabout the old cgroup of the threadgroup leader. No subsystem currently\nneeds that information for each thread that\u0027s being moved, but if one were\nto be added (for example, one that counts tasks within a group) this bit\nwould need to be reworked a bit to tell the subsystem the right\ninformation.\n\n[hidave.darkstar@gmail.com: fix build]\nSigned-off-by: Ben Blum \u003cbblum@google.com\u003e\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nReviewed-by: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Dave Young \u003chidave.darkstar@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c378369d8b4fa516ff2b1e79c3eded4e0e955ebb", "tree": "33dff6fa14c5b70cf25368b1bde57e5610a308b3", "parents": [ "d1d9fd3308fdef6b4bf564fa3d6cfe35b68b50bc" ], "author": { "name": "Ben Blum", "email": "bblum@google.com", "time": "Wed Sep 23 15:56:29 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:58 2009 -0700" }, "message": "cgroups: change css_set freeing mechanism to be under RCU\n\nChanges css_set freeing mechanism to be under RCU\n\nThis is a prepatch for making the procs file writable. In order to free the\nold css_sets for each task to be moved as they\u0027re being moved, the freeing\nmechanism must be RCU-protected, or else we would have to have a call to\nsynchronize_rcu() for each task before freeing its old css_set.\n\nSigned-off-by: Ben Blum \u003cbblum@google.com\u003e\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Oleg Nesterov \u003coleg@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": "d1d9fd3308fdef6b4bf564fa3d6cfe35b68b50bc", "tree": "8de392166f2edb696950a90e468ef27f043be509", "parents": [ "72a8cb30d10d4041c455a7054607a7d519167c87" ], "author": { "name": "Ben Blum", "email": "bblum@google.com", "time": "Wed Sep 23 15:56:28 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:58 2009 -0700" }, "message": "cgroups: use vmalloc for large cgroups pidlist allocations\n\nSeparates all pidlist allocation requests to a separate function that\njudges based on the requested size whether or not the array needs to be\nvmalloced or can be gotten via kmalloc, and similar for kfree/vfree.\n\nSigned-off-by: Ben Blum \u003cbblum@google.com\u003e\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Oleg Nesterov \u003coleg@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": "72a8cb30d10d4041c455a7054607a7d519167c87", "tree": "9b499f9c7f4de011ba5c8282df0b2280b7c21f0b", "parents": [ "102a775e3647628727ae83a9a6abf0564c3ca7cb" ], "author": { "name": "Ben Blum", "email": "bblum@google.com", "time": "Wed Sep 23 15:56:27 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:58 2009 -0700" }, "message": "cgroups: ensure correct concurrent opening/reading of pidlists across pid namespaces\n\nPreviously there was the problem in which two processes from different pid\nnamespaces reading the tasks or procs file could result in one process\nseeing results from the other\u0027s namespace. Rather than one pidlist for\neach file in a cgroup, we now keep a list of pidlists keyed by namespace\nand file type (tasks versus procs) in which entries are placed on demand.\nEach pidlist has its own lock, and that the pidlists themselves are passed\naround in the seq_file\u0027s private pointer means we don\u0027t have to touch the\ncgroup or its master list except when creating and destroying entries.\n\nSigned-off-by: Ben Blum \u003cbblum@google.com\u003e\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Oleg Nesterov \u003coleg@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": "102a775e3647628727ae83a9a6abf0564c3ca7cb", "tree": "77a3d9717daa0f1dceccc0dcdf821aa12e684e07", "parents": [ "8f3ff20862cfcb85500a2bb55ee64622bd59fd0c" ], "author": { "name": "Ben Blum", "email": "bblum@google.com", "time": "Wed Sep 23 15:56:26 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:58 2009 -0700" }, "message": "cgroups: add a read-only \"procs\" file similar to \"tasks\" that shows only unique tgids\n\nstruct cgroup used to have a bunch of fields for keeping track of the\npidlist for the tasks file. Those are now separated into a new struct\ncgroup_pidlist, of which two are had, one for procs and one for tasks.\nThe way the seq_file operations are set up is changed so that just the\npidlist struct gets passed around as the private data.\n\nInterface example: Suppose a multithreaded process has pid 1000 and other\nthreads with ids 1001, 1002, 1003:\n$ cat tasks\n1000\n1001\n1002\n1003\n$ cat cgroup.procs\n1000\n$\n\nSigned-off-by: Ben Blum \u003cbblum@google.com\u003e\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Oleg Nesterov \u003coleg@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": "8f3ff20862cfcb85500a2bb55ee64622bd59fd0c", "tree": "ccf408f52ee23b1c0130520a84c21bbd8f4077e7", "parents": [ "2c6ab6d200827e1c41dc71fff3a2ac7473f51777" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Wed Sep 23 15:56:25 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:58 2009 -0700" }, "message": "cgroups: revert \"cgroups: fix pid namespace bug\"\n\nThe following series adds a \"cgroup.procs\" file to each cgroup that\nreports unique tgids rather than pids, and allows all threads in a\nthreadgroup to be atomically moved to a new cgroup.\n\nThe subsystem \"attach\" interface is modified to support attaching whole\nthreadgroups at a time, which could introduce potential problems if any\nsubsystem were to need to access the old cgroup of every thread being\nmoved. The attach interface may need to be revised if this becomes the\ncase.\n\nAlso added is functionality for read/write locking all CLONE_THREAD\nfork()ing within a threadgroup, by means of an rwsem that lives in the\nsighand_struct, for per-threadgroup-ness and also for sharing a cacheline\nwith the sighand\u0027s atomic count. This scheme should introduce no extra\noverhead in the fork path when there\u0027s no contention.\n\nThe final patch reveals potential for a race when forking before a\nsubsystem\u0027s attach function is called - one potential solution in case any\nsubsystem has this problem is to hang on to the group\u0027s fork mutex through\nthe attach() calls, though no subsystem yet demonstrates need for an\nextended critical section.\n\nThis patch:\n\nRevert\n\ncommit 096b7fe012d66ed55e98bc8022405ede0cc80e96\nAuthor: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAuthorDate: Wed Jul 29 15:04:04 2009 -0700\nCommit: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCommitDate: Wed Jul 29 19:10:35 2009 -0700\n\n cgroups: fix pid namespace bug\n\nThis is in preparation for some clashing cgroups changes that subsume the\noriginal commit\u0027s functionaliy.\n\nThe original commit fixed a pid namespace bug which Ben Blum fixed\nindependently (in the same way, but with different code) as part of a\nseries of patches. I played around with trying to reconcile Ben\u0027s patch\nseries with Li\u0027s patch, but concluded that it was simpler to just revert\nLi\u0027s, given that Ben\u0027s patch series contained essentially the same fix.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Oleg Nesterov \u003coleg@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": "2c6ab6d200827e1c41dc71fff3a2ac7473f51777", "tree": "1ea1e6b46356a0c350c6bc3b39cb852628263fd9", "parents": [ "7717f7ba92de485bce8293419a20ffef130f4286" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Wed Sep 23 15:56:23 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:58 2009 -0700" }, "message": "cgroups: allow cgroup hierarchies to be created with no bound subsystems\n\nThis patch removes the restriction that a cgroup hierarchy must have at\nleast one bound subsystem. The mount option \"none\" is treated as an\nexplicit request for no bound subsystems.\n\nA hierarchy with no subsystems can be useful for plain task tracking, and\nis also a step towards the support for multiply-bindable subsystems.\n\nAs part of this change, the hierarchy id is no longer calculated from the\nbitmask of subsystems in the hierarchy (since this is not guaranteed to be\nunique) but is allocated via an ida. Reference counts on cgroups from\ncss_set objects are now taken explicitly one per hierarchy, rather than\none per subsystem.\n\nExample usage:\n\nmount -t cgroup -o none,name\u003dfoo cgroup /mnt/cgroup\n\nBased on the \"no-op\"/\"none\" subsystem concept proposed by\nkamezawa.hiroyu@jp.fujitsu.com\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Dhaval Giani \u003cdhaval@linux.vnet.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": "7717f7ba92de485bce8293419a20ffef130f4286", "tree": "dc3d164fbef69e8481126bfc9cf596d0895c11e8", "parents": [ "fe6934354f8e287275500cd6ec73826d4d6ad457" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Wed Sep 23 15:56:22 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:58 2009 -0700" }, "message": "cgroups: add a back-pointer from struct cg_cgroup_link to struct cgroup\n\nCurrently the cgroups code makes the assumption that the subsystem\npointers in a struct css_set uniquely identify the hierarchy-\u003ecgroup\nmappings associated with the css_set; and there\u0027s no way to directly\nidentify the associated set of cgroups other than by indirecting through\nthe appropriate subsystem state pointers.\n\nThis patch removes the need for that assumption by adding a back-pointer\nfrom struct cg_cgroup_link object to its associated cgroup; this allows\nthe set of cgroups to be determined by traversing the cg_links list in\nthe struct css_set.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Dhaval Giani \u003cdhaval@linux.vnet.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": "fe6934354f8e287275500cd6ec73826d4d6ad457", "tree": "f5ccab89d27472f5116257d1f7248594d3510882", "parents": [ "c6d57f3312a6619d47c5557b5f6154a74d04ff80" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Wed Sep 23 15:56:20 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:57 2009 -0700" }, "message": "cgroups: move the cgroup debug subsys into cgroup.c to access internal state\n\nWhile it\u0027s architecturally clean to have the cgroup debug subsystem be\ncompletely independent of the cgroups framework, it limits its usefulness\nfor debugging the contents of internal data structures. Move the debug\nsubsystem code into the scope of all the cgroups data structures to make\nmore detailed debugging possible.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Dhaval Giani \u003cdhaval@linux.vnet.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": "c6d57f3312a6619d47c5557b5f6154a74d04ff80", "tree": "b2e9214e58120c5d91ed0039afd06def62bfdf54", "parents": [ "34f77a90f79fca31802c2e942bd73f7f557fe28c" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Wed Sep 23 15:56:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:57 2009 -0700" }, "message": "cgroups: support named cgroups hierarchies\n\nTo simplify referring to cgroup hierarchies in mount statements, and to\nallow disambiguation in the presence of empty hierarchies and\nmultiply-bindable subsystems this patch adds support for naming a new\ncgroup hierarchy via the \"name\u003d\" mount option\n\nA pre-existing hierarchy may be specified by either name or by subsystems;\na hierarchy\u0027s name cannot be changed by a remount operation.\n\nExample usage:\n\n# To create a hierarchy called \"foo\" containing the \"cpu\" subsystem\nmount -t cgroup -oname\u003dfoo,cpu cgroup /mnt/cgroup1\n\n# To mount the \"foo\" hierarchy on a second location\nmount -t cgroup -oname\u003dfoo cgroup /mnt/cgroup2\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Dhaval Giani \u003cdhaval@linux.vnet.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": "34f77a90f79fca31802c2e942bd73f7f557fe28c", "tree": "e8f07fe8da83e346029ea7a4d90c1b1039cdef36", "parents": [ "55dff4954ebdeba2be59e19398a607d799c5fa9f" ], "author": { "name": "Xiaotian Feng", "email": "dfeng@redhat.com", "time": "Wed Sep 23 15:56:18 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:20:57 2009 -0700" }, "message": "cgroups: make unlock sequence in cgroup_get_sb consistent\n\nMake the last unlock sequence consistent with previous unlock sequeue.\n\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nSigned-off-by: Xiaotian Feng \u003cdfeng@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": "88e9d34c727883d7d6f02cf1475b3ec98b8480c7", "tree": "475f544536d52739e0929e7727cab5124e855a06", "parents": [ "b7ed698cc9d556306a4088c238e2ea9311ea2cb3" ], "author": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Tue Sep 22 16:43:43 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Sep 23 07:39:29 2009 -0700" }, "message": "seq_file: constify seq_operations\n\nMake all seq_operations structs const, to help mitigate against\nrevectoring user-triggerable function pointers.\n\nThis is derived from the grsecurity patch, although generated from scratch\nbecause it\u0027s simpler than extracting the changes from there.\n\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nAcked-by: Casey Schaufler \u003ccasey@schaufler-ca.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6e1d5dcc2bbbe71dbf010c747e15739bef6b7218", "tree": "2edb0f6cc65acbae95e42df1bc763ec048e6c2e0", "parents": [ "7f09410bbc4306f592cfb43812389ea1c7905a20" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Mon Sep 21 17:01:11 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:24 2009 -0700" }, "message": "const: mark remaining inode_operations as const\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b87221de6a4934eda856475a0065688d12973a04", "tree": "6bcf0628e106c4833538f4c23d710fbbe3d7609a", "parents": [ "0d54b217a247f39605361f867fefbb9e099a5432" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Mon Sep 21 17:01:09 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:24 2009 -0700" }, "message": "const: mark remaining super_operations const\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d993831fa7ffeb89e994f046f93eeb09ec91df08", "tree": "da4f94bbf022c83988bda71adf1f1b3a88cb4592", "parents": [ "f09b00d3e789a88fa6c7c03cedc62cb65c1de0cb" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Jun 12 14:45:52 2009 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Sep 11 09:20:26 2009 +0200" }, "message": "writeback: add name to backing_dev_info\n\nThis enables us to track who does what and print info. Its main use\nis catching dirty inodes on the default_backing_dev_info, so we can\nfix that up.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "887032670d47366a8c8f25396ea7c14b7b2cc620", "tree": "e5f9ece5ab9239648e8d7051ccb9a217d92553d7", "parents": [ "f0d83679a8d471dc8b646919f70595d6fe8c9606" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Jul 29 15:04:06 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 29 19:10:35 2009 -0700" }, "message": "cgroup avoid permanent sleep at rmdir\n\nAfter commit ec64f51545fffbc4cb968f0cea56341a4b07e85a (\"cgroup: fix\nfrequent -EBUSY at rmdir\"), cgroup\u0027s rmdir (especially against memcg)\ndoesn\u0027t return -EBUSY by temporary ref counts. That commit expects all\nrefs after pre_destroy() is temporary but...it wasn\u0027t. Then, rmdir can\nwait permanently. This patch tries to fix that and change followings.\n\n - set CGRP_WAIT_ON_RMDIR flag before pre_destroy().\n - clear CGRP_WAIT_ON_RMDIR flag when the subsys finds racy case.\n if there are sleeping ones, wakes them up.\n - rmdir() sleeps only when CGRP_WAIT_ON_RMDIR flag is set.\n\nTested-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nReported-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nReviewed-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Balbir Sigh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "096b7fe012d66ed55e98bc8022405ede0cc80e96", "tree": "755709b6d3ff21a9e9640d6c19432b31c863ad34", "parents": [ "b317c833211b7fbf902163de766f09554090e0bf" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jul 29 15:04:04 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 29 19:10:35 2009 -0700" }, "message": "cgroups: fix pid namespace bug\n\nThe bug was introduced by commit cc31edceee04a7b87f2be48f9489ebb72d264844\n(\"cgroups: convert tasks file to use a seq_file with shared pid array\").\n\nWe cache a pid array for all threads that are opening the same \"tasks\"\nfile, but the pids in the array are always from the namespace of the\nlast process that opened the file, so all other threads will read pids\nfrom that namespace instead of their own namespaces.\n\nTo fix it, we maintain a list of pid arrays, which is keyed by pid_ns.\nThe list will be of length 1 at most time.\n\nReported-by: Paul Menage \u003cmenage@google.com\u003e\nIdea-by: Paul Menage \u003cmenage@google.com\u003e\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nReviewed-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "f9ab5b5b0f5be506640321d710b0acd3dca6154a", "tree": "abd8e17febed8507b4c0f96a88d2711fccb31b2b", "parents": [ "8ca739e3694b83cdf22be0f6eff063e721deb1e4" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jun 17 16:26:33 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jun 18 13:03:46 2009 -0700" }, "message": "cgroups: forbid noprefix if mounting more than just cpuset subsystem\n\nThe \u0027noprefix\u0027 option was introduced for backwards-compatibility of\ncpuset, but actually it can be used when mounting other subsystems.\n\nThis results in possibility of name collision, and now the collision can\nreally happen, because we have \u0027stat\u0027 file in both memory and cpuacct\nsubsystem:\n\n\t# mount -t cgroup -o noprefix,memory,cpuacct xxx /mnt\n\nCgroup will happily mount the 2 subsystems, but only \u0027stat\u0027 file of memory\nsubsys can be seen.\n\nWe don\u0027t want users to use nopreifx, and also want to avoid name\ncollision, so we change to allow noprefix only if mounting just the cpuset\nsubsystem.\n\n[akpm@linux-foundation.org: fix shift for cpuset_subsys_id \u003e\u003d 32]\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nAcked-by: Dhaval Giani \u003cdhaval@linux.vnet.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": "337eb00a2c3a421999c39c94ce7e33545ee8baa7", "tree": "d9b780d095b638b1d8fa23841ff70347cf5daa08", "parents": [ "4195f73d1329e49727bcceb028e58cb38376c2b0" ], "author": { "name": "Alessio Igor Bogani", "email": "abogani@texware.it", "time": "Tue May 12 15:10:54 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:11 2009 -0400" }, "message": "Push BKL down into -\u003eremount_fs()\n\n[xfs, btrfs, capifs, shmem don\u0027t need BKL, exempt]\n\nSigned-off-by: Alessio Igor Bogani \u003cabogani@texware.it\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "6f5bbff9a1b7d6864a495763448a363bbfa96324", "tree": "0067dca46f40def1c55541c34c262e06aeb8c4c8", "parents": [ "74dbbdd7fdc11763f4698d2f3e684cf4446951e6" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed May 06 01:34:22 2009 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sat May 09 10:49:40 2009 -0400" }, "message": "Convert obvious places to deactivate_locked_super()\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "0b7f569e45bb6be142d87017030669a6a7d327a1", "tree": "8df7877b95c093ebf4cb4e1006cea16f75fc79b7", "parents": [ "81d39c20f5ee2437d71709beb82597e2a38efbbc" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Apr 02 16:57:38 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:55 2009 -0700" }, "message": "memcg: fix OOM killer under memcg\n\nThis patch tries to fix OOM Killer problems caused by hierarchy.\nNow, memcg itself has OOM KILL function (in oom_kill.c) and tries to\nkill a task in memcg.\n\nBut, when hierarchy is used, it\u0027s broken and correct task cannot\nbe killed. For example, in following cgroup\n\n\t/groupA/\thierarchy\u003d1, limit\u003d1G,\n\t\t01\tnolimit\n\t\t02\tnolimit\nAll tasks\u0027 memory usage under /groupA, /groupA/01, groupA/02 is limited to\ngroupA\u0027s 1Gbytes but OOM Killer just kills tasks in groupA.\n\nThis patch provides makes the bad process be selected from all tasks\nunder hierarchy. BTW, currently, oom_jiffies is updated against groupA\nin above case. oom_jiffies of tree should be updated.\n\nTo see how oom_jiffies is used, please check mem_cgroup_oom_called()\ncallers.\n\n[akpm@linux-foundation.org: build fix]\n[akpm@linux-foundation.org: const fix]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: 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": "0670e08bdfc67272f8c3087030417465629b8073", "tree": "44a4e3b6059aeb8c2a97d5fb8ccf743a2eaafd07", "parents": [ "099fca3225b39f7a3ed853036038054172b55581" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 02 16:57:30 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:54 2009 -0700" }, "message": "cgroups: don\u0027t change release_agent when remount failed\n\nRemount can fail in either case:\n - wrong mount options is specified, or option \u0027noprefix\u0027 is changed.\n - a to-be-added subsys is already mounted/active.\n\nWhen using remount to change \u0027release_agent\u0027, for the above former failure\ncase, remount will return errno with release_agent unchanged, but for the\nlatter case, remount will return EBUSY with relase_agent changed, which is\nunexpected I think:\n\n # mount -t cgroup -o cpu xxx /cgrp1\n # mount -t cgroup -o cpuset,release_agent\u003dagent1 yyy /cgrp2\n # cat /cgrp2/release_agent\n agent1\n # mount -t cgroup -o remount,cpuset,noprefix,release_agent\u003dagent2 yyy /cgrp2\n mount: /cgrp2 not mounted already, or bad option\n # cat /cgrp2/release_agent\n agent1 \u003c-- ok\n # mount -t cgroup -o remount,cpu,cpuset,release_agent\u003dagent2 yyy /cgrp2\n mount: /cgrp2 is busy\n # cat /cgrp2/release_agent\n agent2 \u003c-- unexpected!\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@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": "099fca3225b39f7a3ed853036038054172b55581", "tree": "c7a8863f9ca8a5c745297e9ee43b63494b6022d1", "parents": [ "b6719ec1ad54e47e40633b19703f2c1254708842" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Apr 02 16:57:29 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:54 2009 -0700" }, "message": "cgroups: show correct file mode\n\nWe have some read-only files and write-only files, but currently they are\nall set to 0644, which is counter-intuitive and cause trouble for some\ncgroup tools like libcgroup.\n\nThis patch adds \u0027mode\u0027 to struct cftype to allow cgroup subsys to set it\u0027s\nown files\u0027 file mode, and for the most cases cft-\u003emode can be default to 0\nand cgroup will figure out proper mode.\n\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Li Zefan \u003clizf@cn.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": "66bdc9cfc77ba89a9ee6c82d28375b646ab4bb1d", "tree": "dd0d292a2f413f8c14d2219f8de94516fffe18b5", "parents": [ "ec64f51545fffbc4cb968f0cea56341a4b07e85a" ], "author": { "name": "Jesper Juhl", "email": "jj@chaosbits.net", "time": "Thu Apr 02 16:57:27 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:54 2009 -0700" }, "message": "kernel/cgroup.c: kfree(NULL) is legal\n\nReduces object file size a bit:\n\nBefore:\n$ size kernel/cgroup.o\n text data bss dec hex filename\n 21593 7804 4924 34321 8611 kernel/cgroup.o\nAfter:\n$ size kernel/cgroup.o\n text data bss dec hex filename\n 21537 7744 4924 34205 859d kernel/cgroup.o\n\nSigned-off-by: Jesper Juhl \u003cjj@chaosbits.net\u003e\nCc: Paul Menage \u003cmenage@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": "ec64f51545fffbc4cb968f0cea56341a4b07e85a", "tree": "575d890a6759d81f3324fa2a22ca6ab14a41eefc", "parents": [ "38460b48d06440de46b34cb778bd6c4855030754" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Apr 02 16:57:26 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:54 2009 -0700" }, "message": "cgroup: fix frequent -EBUSY at rmdir\n\nIn following situation, with memory subsystem,\n\n\t/groupA use_hierarchy\u003d\u003d1\n\t\t/01 some tasks\n\t\t/02 some tasks\n\t\t/03 some tasks\n\t\t/04 empty\n\nWhen tasks under 01/02/03 hit limit on /groupA, hierarchical reclaim\nis triggered and the kernel walks tree under groupA. In this case,\nrmdir /groupA/04 fails with -EBUSY frequently because of temporal\nrefcnt from the kernel.\n\nIn general. cgroup can be rmdir\u0027d if there are no children groups and\nno tasks. Frequent fails of rmdir() is not useful to users.\n(And the reason for -EBUSY is unknown to users.....in most cases)\n\nThis patch tries to modify above behavior, by\n\t- retries if css_refcnt is got by someone.\n\t- add \"return value\" to pre_destroy() and allows subsystem to\n\t say \"we\u0027re really busy!\"\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "38460b48d06440de46b34cb778bd6c4855030754", "tree": "8f3362a446b5b03879f715c3f7279e70842bcca9", "parents": [ "313e924c0852943e67335fad9d2608701f0dfe8e" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Apr 02 16:57:25 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:53 2009 -0700" }, "message": "cgroup: CSS ID support\n\nPatch for Per-CSS(Cgroup Subsys State) ID and private hierarchy code.\n\nThis patch attaches unique ID to each css and provides following.\n\n - css_lookup(subsys, id)\n returns pointer to struct cgroup_subysys_state of id.\n - css_get_next(subsys, id, rootid, depth, foundid)\n returns the next css under \"root\" by scanning\n\nWhen cgroup_subsys-\u003euse_id is set, an id for css is maintained.\n\nThe cgroup framework only parepares\n\t- css_id of root css for subsys\n\t- id is automatically attached at creation of css.\n\t- id is *not* freed automatically. Because the cgroup framework\n\t don\u0027t know lifetime of cgroup_subsys_state.\n\t free_css_id() function is provided. This must be called by subsys.\n\nThere are several reasons to develop this.\n\t- Saving space .... For example, memcg\u0027s swap_cgroup is array of\n\t pointers to cgroup. But it is not necessary to be very fast.\n\t By replacing pointers(8bytes per ent) to ID (2byes per ent), we can\n\t reduce much amount of memory usage.\n\n\t- Scanning without lock.\n\t CSS_ID provides \"scan id under this ROOT\" function. By this, scanning\n\t css under root can be written without locks.\n\t ex)\n\t do {\n\t\trcu_read_lock();\n\t\tnext \u003d cgroup_get_next(subsys, id, root, \u0026found);\n\t\t/* check sanity of next here */\n\t\tcss_tryget();\n\t\trcu_read_unlock();\n\t\tid \u003d found + 1\n\t } while(...)\n\nCharacteristics:\n\t- Each css has unique ID under subsys.\n\t- Lifetime of ID is controlled by subsys.\n\t- css ID contains \"ID\" and \"Depth in hierarchy\" and stack of hierarchy\n\t- Allowed ID is 1-65535, ID 0 is UNUSED ID.\n\nDesign Choices:\n\t- scan-by-ID v.s. scan-by-tree-walk.\n\t As /proc\u0027s pid scan does, scan-by-ID is robust when scanning is done\n\t by following kind of routine.\n\t scan -\u003e rest a while(release a lock) -\u003e conitunue from interrupted\n\t memcg\u0027s hierarchical reclaim does this.\n\n\t- When subsys-\u003euse_id is set, # of css in the system is limited to\n\t 65535.\n\n[bharata@linux.vnet.ibm.com: remove rcu_read_lock() from css_get_next()]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Bharata B Rao \u003cbharata@linux.vnet.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": "313e924c0852943e67335fad9d2608701f0dfe8e", "tree": "fa4c3f65a7ed6edea52ae78b012138ebab1420c3", "parents": [ "d20a390a0ee2bf2f692c539c6ce1c829e1080bb5" ], "author": { "name": "Grzegorz Nosek", "email": "root@localdomain.pl", "time": "Thu Apr 02 16:57:23 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 02 19:04:53 2009 -0700" }, "message": "cgroups: relax ns_can_attach checks to allow attaching to grandchild cgroups\n\nThe ns_proxy cgroup allows moving processes to child cgroups only one\nlevel deep at a time. This commit relaxes this restriction and makes it\npossible to attach tasks directly to grandchild cgroups, e.g.:\n\n($pid is in the root cgroup)\necho $pid \u003e /cgroup/CG1/CG2/tasks\n\nPreviously this operation would fail with -EPERM and would have to be\nperformed as two steps:\necho $pid \u003e /cgroup/CG1/tasks\necho $pid \u003e /cgroup/CG1/CG2/tasks\n\nAlso, the target cgroup no longer needs to be empty to move a task there.\n\nSigned-off-by: Grzegorz Nosek \u003croot@localdomain.pl\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@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": "a3ec947c85ec339884b30ef6a08133e9311fdae1", "tree": "c3cc5859a6b6d8986547405b6c5bd11bc8916114", "parents": [ "585d3bc06f4ca57f975a5a1f698f65a45ea66225" ], "author": { "name": "Sukadev Bhattiprolu", "email": "sukadev@linux.vnet.ibm.com", "time": "Wed Mar 04 12:06:34 2009 -0800" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Mar 27 14:44:03 2009 -0400" }, "message": "vfs: simple_set_mnt() should return void\n\nsimple_set_mnt() is defined as returning \u0027int\u0027 but always returns 0.\nCallers assume simple_set_mnt() never fails and don\u0027t properly cleanup if\nit were to _ever_ fail. For instance, get_sb_single() and get_sb_nodev()\nshould:\n\n up_write(sb-\u003es_unmount);\n deactivate_super(sb);\n\nif simple_set_mnt() fails.\n\nSince simple_set_mnt() never fails, would be cleaner if it did not\nreturn anything.\n\n[akpm@linux-foundation.org: fix build]\nSigned-off-by: Sukadev Bhattiprolu \u003csukadev@linux.vnet.ibm.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "3ba13d179e8c24c68eac32b93593a6b10fcd1572", "tree": "732162ba9ddfe66c8e892a25765cb30f0807cf31", "parents": [ "296c2d86635bd6ecd8f282dfff18bb68fb4fc512" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Feb 20 06:02:22 2009 +0000" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Mar 27 14:44:03 2009 -0400" }, "message": "constify dentry_operations: rest\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "67e055d144c5b2acdc1c63811fde031263bf92c5", "tree": "6bdb0af25cc30d7bc8a8d54db3625f8486c2f5f9", "parents": [ "1cf6e7d83bf334cc5916137862c920a97aabc018" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Feb 18 14:48:20 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Feb 18 15:37:54 2009 -0800" }, "message": "cgroups: fix possible use after free\n\nIn cgroup_kill_sb(), root is freed before sb is detached from the list, so\nanother sget() may find this sb and call cgroup_test_super(), which will\naccess the root that has been freed.\n\nReported-by: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@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": "cfebe563bd0a3ff97e1bc167123120d59c7a84db", "tree": "6178bf45bcccaf3d43d87cfe0eef059d849c7140", "parents": [ "01c4a4283137d24c9cc3785f1f312e895a18f273" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Feb 11 13:04:36 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Feb 11 14:25:36 2009 -0800" }, "message": "cgroups: fix lockdep subclasses overflow\n\nI enabled all cgroup subsystems when compiling kernel, and then:\n # mount -t cgroup -o net_cls xxx /mnt\n # mkdir /mnt/0\n\nThis showed up immediately:\n BUG: MAX_LOCKDEP_SUBCLASSES too low!\n turning off the locking correctness validator.\n\nIt\u0027s caused by the cgroup hierarchy lock:\n\tfor (i \u003d 0; i \u003c CGROUP_SUBSYS_COUNT; i++) {\n\t\tstruct cgroup_subsys *ss \u003d subsys[i];\n\t\tif (ss-\u003eroot \u003d\u003d root)\n\t\t\tmutex_lock_nested(\u0026ss-\u003ehierarchy_mutex, i);\n\t}\n\nNow we have 9 cgroup subsystems, and the above \u0027i\u0027 for net_cls is 8, but\nMAX_LOCKDEP_SUBCLASSES is 8.\n\nThis patch uses different lockdep keys for different subsystems.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@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": "839ec5452ebfd5905b9c69b20ceb640903a8ea1a", "tree": "42e371a4230c50c3cb34c92e80f5fa199b01dd2b", "parents": [ "804b3c28a4e4fa1c224571bf76edb534b9c4b1ed" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Thu Jan 29 14:25:22 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 29 18:04:45 2009 -0800" }, "message": "cgroup: fix root_count when mount fails due to busy subsystem\n\nroot_count was being incremented in cgroup_get_sb() after all error\nchecking was complete, but decremented in cgroup_kill_sb(), which can be\ncalled on a superblock that we gave up on due to an error. This patch\nchanges cgroup_kill_sb() to only decrement root_count if the root was\npreviously linked into the list of roots.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nTested-by: Serge Hallyn \u003cserue@us.ibm.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": "804b3c28a4e4fa1c224571bf76edb534b9c4b1ed", "tree": "59e0dabb227a5067cfdc7cce13f149f141ef8cb4", "parents": [ "1404f06565ee89e0ce04d4a5859c00b0e3a0dc8d" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Thu Jan 29 14:25:21 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 29 18:04:45 2009 -0800" }, "message": "cgroups: add cpu_relax() calls in css_tryget() and cgroup_clear_css_refs()\n\ncss_tryget() and cgroup_clear_css_refs() contain polling loops; these\nloops should have cpu_relax calls in them to reduce cross-cache traffic.\n\nSigned-off-by: Paul Menage \u003cmenage@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": "1404f06565ee89e0ce04d4a5859c00b0e3a0dc8d", "tree": "e2f294ed420461e0032e03143f06634b883dc06e", "parents": [ "945048ca36173315afa2f0c53bed21ba01a588c1" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Jan 29 14:25:21 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 29 18:04:45 2009 -0800" }, "message": "cgroups: fix lock inconsistency in cgroup_clone()\n\nI fixed a bug in cgroup_clone() in Linus\u0027 tree in commit 7b574b7\n(\"cgroups: fix a race between cgroup_clone and umount\") without noticing\nthere was a cleanup patch in -mm tree that should be rebased (now commit\n104cbd5, \"cgroups: use task_lock() for access tsk-\u003ecgroups safe in\ncgroup_clone()\"), thus resulted in lock inconsistency.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@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": "baef99a08a2e23d9386b47e53fa5f0d44fc98f66", "tree": "0171abae8bd05710c83444b8a236fc6ffbcac71c", "parents": [ "9e9e3cbc62da43c66e894d5a61fa08b427e25202" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Jan 29 14:25:10 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 29 18:04:43 2009 -0800" }, "message": "cgroups: use hierarchy mutex in creation failure path\n\nNow, cgrp-\u003esibling is handled under hierarchy mutex.\nerror route should do so, too.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by Paul Menage \u003cmenage@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": "e7c5ec9193d32b9559a3bb8893ceedbda85201ff", "tree": "fd7505c03e2c7525a110a702907c0604c233e2d9", "parents": [ "2cb378c862777d050c20db903b119a029845fdcb" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Wed Jan 07 18:08:38 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:10 2009 -0800" }, "message": "cgroups: add css_tryget()\n\nAdd css_tryget(), that obtains a counted reference on a CSS. It is used\nin situations where the caller has a \"weak\" reference to the CSS, i.e.\none that does not protect the cgroup from removal via a reference count,\nbut would instead be cleaned up by a destroy() callback.\n\ncss_tryget() will return true on success, or false if the cgroup is being\nremoved.\n\nThis is similar to Kamezawa Hiroyuki\u0027s patch from a week or two ago, but\nwith the difference that in the event of css_tryget() racing with a\ncgroup_rmdir(), css_tryget() will only return false if the cgroup really\ndoes get removed.\n\nThis implementation is done by biasing css-\u003erefcnt, so that a refcnt of 1\nmeans \"releasable\" and 0 means \"released or releasing\". In the event of a\nrace, css_tryget() distinguishes between \"released\" and \"releasing\" by\nchecking for the CSS_REMOVED flag in css-\u003eflags.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nTested-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "999cd8a450f8f93701669a61cac4d3b19eca07e8", "tree": "990e5b08e6db971d2e9943f89abf39e7c8f4cb1e", "parents": [ "b5a84319a4343a0db753436fd8147e61eaafa7ea" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Wed Jan 07 18:08:36 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:10 2009 -0800" }, "message": "cgroups: add a per-subsystem hierarchy_mutex\n\nThese patches introduce new locking/refcount support for cgroups to\nreduce the need for subsystems to call cgroup_lock(). This will\nultimately allow the atomicity of cgroup_rmdir() (which was removed\nrecently) to be restored.\n\nThese three patches give:\n\n1/3 - introduce a per-subsystem hierarchy_mutex which a subsystem can\n use to prevent changes to its own cgroup tree\n\n2/3 - use hierarchy_mutex in place of calling cgroup_lock() in the\n memory controller\n\n3/3 - introduce a css_tryget() function similar to the one recently\n proposed by Kamezawa, but avoiding spurious refcount failures in\n the event of a race between a css_tryget() and an unsuccessful\n cgroup_rmdir()\n\nFuture patches will likely involve:\n\n- using hierarchy mutex in place of cgroup_lock() in more subsystems\n where appropriate\n\n- restoring the atomicity of cgroup_rmdir() with respect to cgroup_create()\n\nThis patch:\n\nAdd a hierarchy_mutex to the cgroup_subsys object that protects changes to\nthe hierarchy observed by that subsystem. It is taken by the cgroup\nsubsystem (in addition to cgroup_mutex) for the following operations:\n\n- linking a cgroup into that subsystem\u0027s cgroup tree\n- unlinking a cgroup from that subsystem\u0027s cgroup tree\n- moving the subsystem to/from a hierarchy (including across the\n bind() callback)\n\nThus if the subsystem holds its own hierarchy_mutex, it can safely\ntraverse its own hierarchy.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nTested-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "a47295e6bc42ad35f9c15ac66f598aa24debd4e2", "tree": "cb765e996ef35ae88e29d60796655d0d35e8cf5e", "parents": [ "e7b80bb695a5b64c92e314838e083b2f3bdf29b2" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Wed Jan 07 18:07:44 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:03 2009 -0800" }, "message": "cgroups: make cgroup_path() RCU-safe\n\nFix races between /proc/sched_debug by freeing cgroup objects via an RCU\ncallback. Thus any cgroup reference obtained from an RCU-safe source will\nremain valid during the RCU section. Since dentries are also RCU-safe,\nthis allows us to traverse up the tree safely.\n\nAdditionally, make cgroup_path() check for a NULL cgrp-\u003edentry to avoid\ntrying to report a path for a partially-created cgroup.\n\n[lizf@cn.fujitsu.com: call deactive_super() in cgroup_diput()]\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nTested-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Li Zefan \u003clizf@cn.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": "e7b80bb695a5b64c92e314838e083b2f3bdf29b2", "tree": "f5eafb9825a23550dbf903e5cabd71655e4e55ce", "parents": [ "c12f65d4396e05c51ce3af7f159ead98574a587c" ], "author": { "name": "Gowrishankar M", "email": "gowrishankar.m@in.ibm.com", "time": "Wed Jan 07 18:07:43 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:03 2009 -0800" }, "message": "cgroups: skip processes from other namespaces when listing a cgroup\n\nOnce tasks are populated from system namespace inside cgroup, container\nreplaces other namespace task with 0 while listing tasks, inside\ncontainer.\n\nThough this is expected behaviour from container end, there is no use of\nshowing unwanted 0s.\n\nIn this patch, we check if a process is in same namespace before loading\ninto pid array.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Gowrishankar M \u003cgowrishankar.m@in.ibm.com\u003e\nAcked-by: Paul Menage \u003cmenage@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": "c12f65d4396e05c51ce3af7f159ead98574a587c", "tree": "95e4f2e4878101ca2b9e3efc0a9cc5f25ce678d7", "parents": [ "33a68ac1c1b695216e873ee12e819adbe73e4d9f" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jan 07 18:07:42 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:03 2009 -0800" }, "message": "cgroups: introduce link_css_set() to remove duplicate code\n\nAdd a common function link_css_set() to link a css_set to a cgroup.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "33a68ac1c1b695216e873ee12e819adbe73e4d9f", "tree": "0c58e50e7c528200390f740265f7eb7e7a3a87e6", "parents": [ "e5f6a8609bab0c2d7543ab1505105e011832afd7" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jan 07 18:07:42 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:03 2009 -0800" }, "message": "cgroups: add inactive subsystems to rootnode.subsys_list\n\nThough for an inactive hierarchy, we have subsys-\u003eroot \u003d\u003d \u0026rootnode, but\nrootnode\u0027s subsys_list is always empty.\n\nThis conflicts with the code in find_css_set():\n\n\tfor (i \u003d 0; i \u003c CGROUP_SUBSYS_COUNT; i++) {\n\t\t...\n\t\tif (ss-\u003eroot-\u003esubsys_list.next \u003d\u003d \u0026ss-\u003esibling) {\n\t\t\t...\n\t\t}\n\t}\n\tif (list_empty(\u0026rootnode.subsys_list)) {\n\t\t...\n\t}\n\nThe above code assumes rootnode.subsys_list links all inactive\nhierarchies.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "e5f6a8609bab0c2d7543ab1505105e011832afd7", "tree": "07591b1fb27431cee41ea4ca097b514a0e773ba7", "parents": [ "7534432dcc3c654a8671b6b0cdffd1dbdbc73074" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jan 07 18:07:41 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:03 2009 -0800" }, "message": "cgroups: make root_list contains active hierarchies only\n\nDon\u0027t link rootnode to the root list, so root_list contains active\nhierarchies only as the comment indicates. And rename for_each_root() to\nfor_each_active_root().\n\nAlso remove redundant check in cgroup_kill_sb().\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "7534432dcc3c654a8671b6b0cdffd1dbdbc73074", "tree": "65a5010c8bc5062d004fd1ede32e8f7ba64f6eec", "parents": [ "77efecd9e0526327548152df715ab8644ecb5ba0" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Wed Jan 07 18:07:40 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:03 2009 -0800" }, "message": "cgroups: remove rcu_read_lock() in cgroupstats_build()\n\ncgroup_iter_* do not need rcu_read_lock().\n\nIn cgroup_enable_task_cg_lists(), do_each_thread() and while_each_thread()\nare protected by RCU, it\u0027s OK, for write_lock(\u0026css_set_lock) implies\nrcu_read_lock() in non-RT kernel.\n\nIf we need explicit rcu_read_lock(), we should add rcu_read_lock() in\ncgroup_enable_task_cg_lists(), not cgroup_iter_*.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "77efecd9e0526327548152df715ab8644ecb5ba0", "tree": "4dd2a82fe5db454fb018e434e07c3e6f30dc9832", "parents": [ "104cbd55377029e70fc2cee01089e84b9c36e5dc" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Wed Jan 07 18:07:39 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:02 2009 -0800" }, "message": "cgroups: call find_css_set() safely in cgroup_attach_task()\n\nIn cgroup_attach_task(), tsk maybe exit when we call find_css_set(). and\nfind_css_set() will access to invalid css_set.\n\nThis patch increases the count before get_css_set(), and decreases it\nafter find_css_set().\n\nNOTE:\n\ncss_set\u0027s refcount is also taskcount, after this patch applied, taskcount\nmay be off-by-one WHEN cgroup_lock() is not held. but I reviewed other\ncode which use taskcount, they are still correct. No regression found by\nreviewing and simply testing.\n\nSo I do not use two counters in css_set. (one counter for taskcount, the\nother for refcount. like struct mm_struct) If this fix cause regression,\nwe will use two counters in css_set.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "104cbd55377029e70fc2cee01089e84b9c36e5dc", "tree": "60c7d0d9625b74f6a2733a9618cc97dc772848f5", "parents": [ "b2aa30f7bb381e04c93eed106089ba55553955f1" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Wed Jan 07 18:07:38 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:02 2009 -0800" }, "message": "cgroups: use task_lock() for access tsk-\u003ecgroups safe in cgroup_clone()\n\nUse task_lock() protect tsk-\u003ecgroups and get_css_set(tsk-\u003ecgroups).\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "b2aa30f7bb381e04c93eed106089ba55553955f1", "tree": "eda632102a0bc6e325a24e77a9c2819eab5aeef3", "parents": [ "2019f634ce5904c19eba4e86f51b1a119a53a9f1" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Wed Jan 07 18:07:37 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:02 2009 -0800" }, "message": "cgroups: don\u0027t put struct cgroupfs_root protected by RCU\n\nWe don\u0027t access struct cgroupfs_root in fast path, so we should not put\nstruct cgroupfs_root protected by RCU\n\nBut the comment in struct cgroup_subsys.root confuse us.\n\nstruct cgroup_subsys.root is used in these places:\n\n1 find_css_set(): if (ss-\u003eroot-\u003esubsys_list.next \u003d\u003d \u0026ss-\u003esibling)\n2 rebind_subsystems(): if (ss-\u003eroot !\u003d \u0026rootnode)\n rcu_assign_pointer(ss-\u003eroot, root);\n rcu_assign_pointer(subsys[i]-\u003eroot, \u0026rootnode);\n3 cgroup_has_css_refs(): if (ss-\u003eroot !\u003d cgrp-\u003eroot)\n4 cgroup_init_subsys(): ss-\u003eroot \u003d \u0026rootnode;\n5 proc_cgroupstats_show(): ss-\u003ename, ss-\u003eroot-\u003esubsys_bits,\n ss-\u003eroot-\u003enumber_of_cgroups, !ss-\u003edisabled);\n6 cgroup_clone(): root \u003d subsys-\u003eroot;\n if ((root !\u003d subsys-\u003eroot) ||\n\nAll these place we have held cgroup_lock() or we don\u0027t dereference to\nstruct cgroupfs_root. It\u0027s means wo don\u0027t need RCU when use struct\ncgroup_subsys.root, and we should not put struct cgroupfs_root protected\nby RCU.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nReviewed-by: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "2019f634ce5904c19eba4e86f51b1a119a53a9f1", "tree": "040b8645c0627baa0f4e44113589b5a4894ea629", "parents": [ "b12b533fa523e94e0cc9dc23274ae4f9439f1313" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Wed Jan 07 18:07:36 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:02 2009 -0800" }, "message": "cgroups: fix cgroup_iter_next() bug\n\nWe access res-\u003ecgroups without the task_lock(), so res-\u003ecgroups may be\nchanged. it\u0027s unreliable, and \"if (l \u003d\u003d \u0026res-\u003ecgroups-\u003etasks)\" may be\nfalse forever.\n\nWe don\u0027t need add any lock for fixing this bug. we just access to struct\ncss_set by struct cg_cgroup_link, not by struct task_struct.\n\nSince we hold css_set_lock, struct cg_cgroup_link is reliable.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nReviewed-by: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "b12b533fa523e94e0cc9dc23274ae4f9439f1313", "tree": "00a08a34388e835ae3103a6f00c96129d3fa59a4", "parents": [ "c9d5409f8d46fd0d18b4a4481d9caa04076d87fc" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Wed Jan 07 18:07:36 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:02 2009 -0800" }, "message": "cgroups: add lock for child-\u003ecgroups in cgroup_post_fork()\n\nWhen cgroup_post_fork() is called, child is seen by find_task_by_vpid(),\nso child-\u003ecgroups maybe be changed, It\u0027ll incorrect.\n\nchild-\u003ecgroups\u003cold\u003e\u0027s refcnt is decreased\nchild-\u003ecgroups\u003cnew\u003e\u0027s refcnt is increased\nbut child-\u003ecg_list is added to child-\u003ecgroups\u003cold\u003e\u0027s list.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nReviewed-by: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "75139b8274c3e30354daea623f14b43a482a0bb5", "tree": "0da75602e260cd565d9f8c03d789744448966171", "parents": [ "18e7f1f0d34be4a39f7f47324a3e26b43fddb714" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Jan 07 18:07:33 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:01 2009 -0800" }, "message": "cgroups: remove some redundant NULL checks\n\n- In cgroup_clone(), if vfs_mkdir() returns successfully,\n dentry-\u003ed_fsdata will be the pointer to the newly created\n cgroup and won\u0027t be NULL.\n\n- a cgroup file\u0027s dentry-\u003ed_fsdata won\u0027t be NULL, guaranteed\n by cgroup_add_file().\n\n- When walking through the subsystems of a cgroup_fs (using\n for_each_subsys), cgrp-\u003esubsys[ss-\u003esubsys_id] won\u0027t be NULL,\n guaranteed by cgroup_create().\n\n(Also remove 2 unused variables in cgroup_rmdir().\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e5991371ee0d1c0ce19e133c6f9075b49c5b4ae8", "tree": "3e5c9c3293c025f537ff4416660a96d33c694b5f", "parents": [ "39f0dee2d8abe902617622b71f8f6f73985ec71c" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:39:22 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:01 2009 -0800" }, "message": "mm: remove cgroup_mm_owner_callbacks\n\ncgroup_mm_owner_callbacks() was brought in to support the memrlimit\ncontroller, but sneaked into mainline ahead of it. That controller has\nnow been shelved, and the mm_owner_changed() args were inadequate for it\nanyway (they needed an mm pointer instead of a task pointer).\n\nRemove the dead code, and restore mm_update_next_owner() locking to how it\nwas before: taking mmap_sem there does nothing for memcontrol.c, now the\nonly user of mm-\u003eowner.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "520c85346666d4d9a6fcaaa8450542302dc28b91", "tree": "9c9cc9e2493b606104dd8602302ae28258ebeac0", "parents": [ "e8c82c2e23e3527e0c9dc195e432c16784d270fa", "4ae8978cf92a96257cd8998a49e781be83571d64" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jan 05 18:32:06 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jan 05 18:32:06 2009 -0800" }, "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 inotify: fix type errors in interfaces\n fix breakage in reiserfs_new_inode()\n fix the treatment of jfs special inodes\n vfs: remove duplicate code in get_fs_type()\n add a vfs_fsync helper\n sys_execve and sys_uselib do not call into fsnotify\n zero i_uid/i_gid on inode allocation\n inode-\u003ei_op is never NULL\n ntfs: don\u0027t NULL i_op\n isofs check for NULL -\u003ei_op in root directory is dead code\n affs: do not zero -\u003ei_op\n kill suid bit only for regular files\n vfs: lseek(fd, 0, SEEK_CUR) race condition\n" }, { "commit": "56ff5efad96182f4d3cb3dc6b07396762c658f16", "tree": "cb91f93aa2324573527165d56d230b606a3111ed", "parents": [ "acfa4380efe77e290d3a96b11cd4c9f24f4fbb18" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Dec 09 09:34:39 2008 -0500" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Jan 05 11:54:28 2009 -0500" }, "message": "zero i_uid/i_gid on inode allocation\n\n... and don\u0027t bother in callers. Don\u0027t bother with zeroing i_blocks,\nwhile we are at it - it\u0027s already been zeroed.\n\ni_mode is not worth the effort; it has no common default value.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "7b574b7b0124ed344911f5d581e9bc2d83bbeb19", "tree": "6511203310d77359017accb466f3f5e1e90abe13", "parents": [ "7d3b56ba37a95f1f370f50258ed3954c304c524b" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Sun Jan 04 12:00:45 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jan 04 13:33:19 2009 -0800" }, "message": "cgroups: fix a race between cgroup_clone and umount\n\nThe race is calling cgroup_clone() while umounting the ns cgroup subsys,\nand thus cgroup_clone() might access invalid cgroup_fs, or kill_sb() is\ncalled after cgroup_clone() created a new dir in it.\n\nThe BUG I triggered is BUG_ON(root-\u003enumber_of_cgroups !\u003d 1);\n\n ------------[ cut here ]------------\n kernel BUG at kernel/cgroup.c:1093!\n invalid opcode: 0000 [#1] SMP\n ...\n Process umount (pid: 5177, ti\u003de411e000 task\u003de40c4670 task.ti\u003de411e000)\n ...\n Call Trace:\n [\u003cc0493df7\u003e] ? deactivate_super+0x3f/0x51\n [\u003cc04a3600\u003e] ? mntput_no_expire+0xb3/0xdd\n [\u003cc04a3ab2\u003e] ? sys_umount+0x265/0x2ac\n [\u003cc04a3b06\u003e] ? sys_oldumount+0xd/0xf\n [\u003cc0403911\u003e] ? sysenter_do_call+0x12/0x31\n ...\n EIP: [\u003cc0456e76\u003e] cgroup_kill_sb+0x23/0xe0 SS:ESP 0068:e411ef2c\n ---[ end trace c766c1be3bf944ac ]---\n\nCc: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: \"Serge E. Hallyn\" \u003cserue@us.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cbacc2c7f066a1e01b33b0e27ae5efbf534bc2db", "tree": "90d1093131d2a3543a8b3b1f3364e7c6f4081a93", "parents": [ "4a6908a3a050aacc9c3a2f36b276b46c0629ad91", "74192246910ff4fb95309ba1a683215644beeb62" ], "author": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Thu Dec 25 11:40:09 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Thu Dec 25 11:40:09 2008 +1100" }, "message": "Merge branch \u0027next\u0027 into for-linus\n" }, { "commit": "20ca9b3f4c6dfa0af8dd5b18a64df17eb994b54d", "tree": "508c0b887653577a2e28dc238c820178593f0f91", "parents": [ "e368d3a836797ddf193b1ec18c97407a791d2451" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Dec 23 13:57:14 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Dec 23 15:58:21 2008 -0800" }, "message": "cgroups: avoid accessing uninitialized data in failure path\n\nIf cgroup_get_rootdir() failed, free_cg_links() will be called in the\nfailure path, but tmp_cg_links hasn\u0027t been initialized at that time.\n\nI introduced this bug in the 2.6.27 merge window.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Paul Menage \u003cmenage@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": "e368d3a836797ddf193b1ec18c97407a791d2451", "tree": "d8e34dc005f175b14d8e579a71e2ff064d018ce4", "parents": [ "f00a189257836e5237ace3265f6991ef66a16c86" ], "author": { "name": "Sharyathi Nagesh", "email": "sharyath@in.ibm.com", "time": "Tue Dec 23 13:57:12 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Dec 23 15:58:21 2008 -0800" }, "message": "cgroups: suppress bogus warning messages\n\nRemove spurious warning messages that are thrown onto the console during\ncgroup operations.\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Sharyathi Nagesh \u003csharyathi@in.ibm.com\u003e\nAcked-by: Serge E. Hallyn \u003cserge@hallyn.com\u003e\nCc: Paul Menage \u003cmenage@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": "307257cf475aac25db30b669987f13d90c934e3a", "tree": "393a2c87fd1834aed3e686b65ba5479bae871b0d", "parents": [ "38aefbc585c5d86df101e7644bff2c47112783d4" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Mon Dec 15 13:54:22 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Dec 15 16:27:07 2008 -0800" }, "message": "cgroups: fix a race between rmdir and remount\n\nWhen a cgroup is removed, it\u0027s unlinked from its parent\u0027s children list,\nbut not actually freed until the last dentry on it is released (at which\npoint cgrp-\u003eroot-\u003enumber_of_cgroups is decremented).\n\nCurrently rebind_subsystems checks for the top cgroup\u0027s child list being\nempty in order to rebind subsystems into or out of a hierarchy - this can\nresult in the set of subsystems bound to a hierarchy being\nremoved-but-not-freed cgroup.\n\nThe simplest fix for this is to forbid remounts that change the set of\nsubsystems on a hierarchy that has removed-but-not-freed cgroups. This\nbug can be reproduced via:\n\nmkdir /mnt/cg\nmount -t cgroup -o ns,freezer cgroup /mnt/cg\nmkdir /mnt/cg/foo\nsleep 1h \u003c /mnt/cg/foo \u0026\nrmdir /mnt/cg/foo\nmount -t cgroup -o remount,ns,devices,freezer cgroup /mnt/cg\nkill $!\n\nThough the above will cause oops in -mm only but not mainline, but the bug\ncan cause memory leak in mainline (and even oops)\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: Li Zefan \u003clizf@cn.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": "ec98ce480ada787f2cfbd696980ff3564415505b", "tree": "1a4d644b38f9f1e4b4e086fde0b195df4a92cf84", "parents": [ "3496f92beb9aa99ef21fccc154a36c7698e9c538", "feaf3848a813a106f163013af6fcf6c4bfec92d9" ], "author": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Thu Dec 04 17:16:36 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Thu Dec 04 17:16:36 2008 +1100" }, "message": "Merge branch \u0027master\u0027 into next\n\nConflicts:\n\tfs/nfsd/nfs4recover.c\n\nManually fixed above to use new creds API functions, e.g.\nnfs4_save_creds().\n\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "33d283bef23132c48195eafc21449f8ba88fce6b", "tree": "e4a04851127f2f46122cb96fc13e8da71a7bcf10", "parents": [ "ea7e743e49b94749fc739baaf160809ed279aeda" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Nov 19 15:36:48 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Nov 19 18:50:00 2008 -0800" }, "message": "cgroups: fix a serious bug in cgroupstats\n\nTry this, and you\u0027ll get oops immediately:\n # cd Documentation/accounting/\n # gcc -o getdelays getdelays.c\n # mount -t cgroup -o debug xxx /mnt\n # ./getdelays -C /mnt/tasks\n\nBecause a normal file\u0027s dentry-\u003ed_fsdata is a pointer to struct cftype,\nnot struct cgroup.\n\nAfter the patch, it returns EINVAL if we try to get cgroupstats\nfrom a normal file.\n\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[2.6.25.x, 2.6.26.x, 2.6.27.x]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3fa59dfbc3b223f02c26593be69ce6fc9a940405", "tree": "d3d9df521342b49abc636e1ee465b704858b3e0d", "parents": [ "0ae15132a4f5c758a6ffcde74495641dc3f62ba1" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Nov 19 15:36:34 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Nov 19 18:49:58 2008 -0800" }, "message": "cgroup: fix potential deadlock in pre_destroy\n\nAs Balbir pointed out, memcg\u0027s pre_destroy handler has potential deadlock.\n\nIt has following lock sequence.\n\n\tcgroup_mutex (cgroup_rmdir)\n\t -\u003e pre_destroy -\u003e mem_cgroup_pre_destroy-\u003e force_empty\n\t\t-\u003e cpu_hotplug.lock. (lru_add_drain_all-\u003e\n\t\t\t\t schedule_work-\u003e\n get_online_cpus)\n\nBut, cpuset has following.\n\tcpu_hotplug.lock (call notifier)\n\t\t-\u003e cgroup_mutex. (within notifier)\n\nThen, this lock sequence should be fixed.\n\nConsidering how pre_destroy works, it\u0027s not necessary to holding\ncgroup_mutex() while calling it.\n\nAs a side effect, we don\u0027t have to wait at this mutex while memcg\u0027s\nforce_empty works.(it can be long when there are tons of pages.)\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2b828925652340277a889cbc11b2d0637f7cdaf7", "tree": "32fcb3d3e466fc419fad2d3717956a5b5ad3d35a", "parents": [ "3a3b7ce9336952ea7b9564d976d068a238976c9d", "58e20d8d344b0ee083febb18c2b021d2427e56ca" ], "author": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 11:29:12 2008 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Fri Nov 14 11:29:12 2008 +1100" }, "message": "Merge branch \u0027master\u0027 into next\n\nConflicts:\n\tsecurity/keys/internal.h\n\tsecurity/keys/process_keys.c\n\tsecurity/keys/request_key.c\n\nFixed conflicts above by using the non \u0027tsk\u0027 versions.\n\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": "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": "24eb089950ce44603b30a3145a2c8520e2b55bb1", "tree": "3cccd3e15589c693c8c4e6484a938d2343ef1abc", "parents": [ "b41ad14c30acf023d09ac064096a4cf41248ce46" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Nov 06 12:53:32 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Nov 06 15:41:19 2008 -0800" }, "message": "cgroups: fix invalid cgrp-\u003edentry before cgroup has been completely removed\n\nThis fixes an oops when reading /proc/sched_debug.\n\nA cgroup won\u0027t be removed completely until finishing cgroup_diput(), so we\nshouldn\u0027t invalidate cgrp-\u003edentry in cgroup_rmdir(). Otherwise, when a\ngroup is being removed while cgroup_path() gets called, we may trigger\nNULL dereference BUG.\n\nThe bug can be reproduced:\n\n # cat test.sh\n #!/bin/sh\n mount -t cgroup -o cpu xxx /mnt\n for (( ; ; ))\n {\n\tmkdir /mnt/sub\n\trmdir /mnt/sub\n }\n # ./test.sh \u0026\n # cat /proc/sched_debug\n\nBUG: unable to handle kernel NULL pointer dereference at 00000038\nIP: [\u003cc045a47f\u003e] cgroup_path+0x39/0x90\n...\nCall Trace:\n [\u003cc0420344\u003e] ? print_cfs_rq+0x6e/0x75d\n [\u003cc0421160\u003e] ? sched_debug_show+0x72d/0xc1e\n...\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[2.6.26.x, 2.6.27.x]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2077776641b6ffb0049f13018d2e162340ec51c7", "tree": "7fa3a58a4a8645f7a756e1f05c3f1d48ed6b639b", "parents": [ "b1cd2ee3b95f1c3108c68c82342c614e58ce1f13" ], "author": { "name": "Stephen Rothwell", "email": "sfr@canb.auug.org.au", "time": "Tue Oct 21 16:11:20 2008 +1100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Oct 26 09:38:17 2008 -0700" }, "message": "cgroup: remove unused variable\n\n/scratch/sfr/next/kernel/cgroup.c: In function \u0027cgroup_tasks_start\u0027:\n/scratch/sfr/next/kernel/cgroup.c:2107: warning: unused variable \u0027i\u0027\n\nIntroduced in commit cc31edceee04a7b87f2be48f9489ebb72d264844 \"cgroups:\nconvert tasks file to use a seq_file with shared pid array\".\n\nSigned-off-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cc31edceee04a7b87f2be48f9489ebb72d264844", "tree": "5d37791218c420281e509899645d89aee7902f2b", "parents": [ "146aa1bd0511f88ddb4e92fafa2b8aad4f2f65f3" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Sat Oct 18 20:28:04 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:52:38 2008 -0700" }, "message": "cgroups: convert tasks file to use a seq_file with shared pid array\n\nRather than pre-generating the entire text for the \"tasks\" file each\ntime the file is opened, we instead just generate/update the array of\nprocess ids and use a seq_file to report these to userspace. All open\nfile handles on the same \"tasks\" file can share a pid array, which may\nbe updated any time that no thread is actively reading the array. By\nsharing the array, the potential for userspace to DoS the system by\nopening many handles on the same \"tasks\" file is removed.\n\n[Based on a patch by Lai Jiangshan, extended to use seq_file]\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nReviewed-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "146aa1bd0511f88ddb4e92fafa2b8aad4f2f65f3", "tree": "d7deb46b9a38f82f109b2126317899efbbce41c2", "parents": [ "248736c2a57206388c86f8cdd3392ee986e84f9f" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Sat Oct 18 20:28:03 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:52:38 2008 -0700" }, "message": "cgroups: fix probable race with put_css_set[_taskexit] and find_css_set\n\nput_css_set_taskexit may be called when find_css_set is called on other\ncpu. And the race will occur:\n\nput_css_set_taskexit side find_css_set side\n\n |\natomic_dec_and_test(\u0026kref-\u003erefcount) |\n /* kref-\u003erefcount \u003d 0 */ |\n....................................................................\n | read_lock(\u0026css_set_lock)\n | find_existing_css_set\n | get_css_set\n | read_unlock(\u0026css_set_lock);\n....................................................................\n__release_css_set |\n....................................................................\n | /* use a released css_set */\n |\n\n[put_css_set is the same. But in the current code, all put_css_set are\nput into cgroup mutex critical region as the same as find_css_set.]\n\n[akpm@linux-foundation.org: repair comments]\n[menage@google.com: eliminate race in css_set refcounting]\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Paul Menage \u003cmenage@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": "9363b9f23c9cc36cc8ef6c05fdf879ee4a96ae92", "tree": "482746b06d6fdd8be606de4dff584a3a40054c4c", "parents": [ "1648993fb05c487947c1cec6307aca29d8002abe" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Wed Oct 15 22:01:05 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 16 11:21:28 2008 -0700" }, "message": "memrlimit: cgroup mm owner callback changes to add task info\n\nThis patch adds an additional field to the mm_owner callbacks. This field\nis required to get to the mm that changed. Hold mmap_sem in write mode\nbefore calling the mm_owner_changed callback\n\n[hugh@veritas.com: fix mmap_sem deadlock]\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Sudhir Kumar \u003cskumar@linux.vnet.ibm.com\u003e\nCc: YAMAMOTO Takashi \u003cyamamoto@valinux.co.jp\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Vivek Goyal \u003cvgoyal@redhat.com\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "31a78f23bac0069004e69f98808b6988baccb6b6", "tree": "edca8cffb4682de6be2e79b0b8d381dbb1b70964", "parents": [ "bf5cb66447e7d9f7f111c1d0ebb6d7c90ec24b4d" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Sun Sep 28 23:09:31 2008 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Sep 29 08:41:47 2008 -0700" }, "message": "mm owner: fix race between swapoff and exit\n\nThere\u0027s a race between mm-\u003eowner assignment and swapoff, more easily\nseen when task slab poisoning is turned on. The condition occurs when\ntry_to_unuse() runs in parallel with an exiting task. A similar race\ncan occur with callers of get_task_mm(), such as /proc/\u003cpid\u003e/\u003cmmstats\u003e\nor ptrace or page migration.\n\nCPU0 CPU1\n try_to_unuse\n looks at mm \u003d task0-\u003emm\n increments mm-\u003emm_users\ntask 0 exits\nmm-\u003eowner needs to be updated, but no\nnew owner is found (mm_users \u003e 1, but\nno other task has task-\u003emm \u003d task0-\u003emm)\nmm_update_next_owner() leaves\n mmput(mm) decrements mm-\u003emm_users\ntask0 freed\n dereferencing mm-\u003eowner fails\n\nThe fix is to notify the subsystem via mm_owner_changed callback(),\nif no new owner is found, by specifying the new task as NULL.\n\nJiri Slaby:\nmm-\u003eowner was set to NULL prior to calling cgroup_mm_owner_callbacks(), but\nmust be set after that, so as not to pass NULL as old owner causing oops.\n\nDaisuke Nishimura:\nmm_update_next_owner() may set mm-\u003eowner to NULL, but mem_cgroup_from_task()\nand its callers need to take account of this situation to avoid oops.\n\nHugh Dickins:\nLockdep warning and hang below exec_mmap() when testing these patches.\nexit_mm() up_reads mmap_sem before calling mm_update_next_owner(),\nso exec_mmap() now needs to do the same. And with that repositioning,\nthere\u0027s now no point in mm_need_new_owner() allowing for NULL mm.\n\nReported-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Jiri Slaby \u003cjirislaby@gmail.com\u003e\nSigned-off-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@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": "55b6fd0162ace1e0f1b52c8c092565c115127ef6", "tree": "a2ace1f82ebdfe88d72e8c3ad7596e9d18ae2e35", "parents": [ "36553434f475a84b653e25e74490ee8df43b86d5" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Jul 29 22:33:20 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 30 09:41:44 2008 -0700" }, "message": "cgroup: uninline cgroup_has_css_refs()\n\nIt\u0027s not small enough, and has 2 call sites.\n\n text data bss dec hex filename\n12813 1676 4832 19321 4b79 cgroup.o.orig\n12775 1676 4832 19283 4b53 cgroup.o\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "36553434f475a84b653e25e74490ee8df43b86d5", "tree": "869f827ebb4974674a26de22db6c15f122e63618", "parents": [ "5a3eb9f6b7c598529f832b8baa6458ab1cbab2c6" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Jul 29 22:33:19 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 30 09:41:44 2008 -0700" }, "message": "cgroup: remove duplicate code in allocate_cg_link()\n\n- just call free_cg_links() in allocate_cg_links()\n- the list will get initialized in allocate_cg_links(), so don\u0027t init\n it twice\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "5a3eb9f6b7c598529f832b8baa6458ab1cbab2c6", "tree": "16d1d481e86fb222e4e18c0681c1e5a4710675fb", "parents": [ "1d1958f05095a7e9ecbba86235122784a3d1b561" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Jul 29 22:33:18 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 30 09:41:44 2008 -0700" }, "message": "cgroup: fix possible memory leak\n\nThere\u0027s a leak if copy_from_user() returns failure.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "3f8206d496e9e9495afb1d4e70d29712b4d403c9", "tree": "5bedea1aff8b5e584fbf8497c80fcaccf9242d69", "parents": [ "964bd183624c03680796b63b4ab97ee3905a806a" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sat Jul 26 03:46:43 2008 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sat Jul 26 20:53:42 2008 -0400" }, "message": "[PATCH] get rid of indirect users of namei.h\n\nfs.h needs path.h, not namei.h; nfs_fs.h doesn\u0027t need it at all.\nSeveral places in the tree needed direct include.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "96930a6365c99c160138a395566e360b27348b8f", "tree": "c78d1d7f2cfcc863aa38726eddd3783814c6d174", "parents": [ "0e1451da4f928ae1c9d5ca617faebde9f02985db" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Fri Jul 25 19:46:21 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jul 26 12:00:11 2008 -0700" }, "message": "make cgroup_seqfile_release() static\n\ncgroup_seqfile_release() can become static.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nAcked-by: Paul Menage \u003cmenage@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": "e885dcde75685e09f23cffae1f6d5169c105b8a0", "tree": "711a91e83fad632c194700839d3e47631aee677a", "parents": [ "856c13aa1ff6136c1968414fdea5938ea9d5ebf2" ], "author": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Fri Jul 25 01:47:06 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:37 2008 -0700" }, "message": "cgroup_clone: use pid of newly created task for new cgroup\n\ncgroup_clone creates a new cgroup with the pid of the task. This works\ncorrectly for unshare, but for clone cgroup_clone is called from\ncopy_namespaces inside copy_process, which happens before the new pid is\ncreated. As a result, the new cgroup was created with current\u0027s pid.\nThis patch:\n\n\t1. Moves the call inside copy_process to after the new pid\n\t is created\n\t2. Passes the struct pid into ns_cgroup_clone (as it is not\n\t yet attached to the task)\n\t3. Passes a name from ns_cgroup_clone() into cgroup_clone()\n\t so as to keep cgroup_clone() itself simpler\n\t4. Uses pid_vnr() to get the process id value, so that the\n\t pid used to name the new cgroup is always the pid as it\n\t would be known to the task which did the cloning or\n\t unsharing. I think that is the most intuitive thing to\n\t do. This way, task t1 does clone(CLONE_NEWPID) to get\n\t t2, which does clone(CLONE_NEWPID) to get t3, then the\n\t cgroup for t3 will be named for the pid by which t2 knows\n\t t3.\n\n(Thanks to Dan Smith for finding the main bug)\n\nChangelog:\n\tJune 11: Incorporate Paul Menage\u0027s feedback: don\u0027t pass\n\t NULL to ns_cgroup_clone from unshare, and reduce\n\t\t patch size by using \u0027nodename\u0027 in cgroup_clone.\n\tJune 10: Original version\n\n[akpm@linux-foundation.org: build fix]\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Serge Hallyn \u003cserge@us.ibm.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nTested-by: Dan Smith \u003cdanms@us.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "af351026aafc8da16518a02b41c66d3e0c1cdef4", "tree": "f294376157f2e1c91f5a4b6ff90b4183dc6f7969", "parents": [ "6379c106152388f7ea45d6dda63edda0e9181fc8" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Fri Jul 25 01:47:01 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:36 2008 -0700" }, "message": "cgroup files: turn attach_task_by_pid directly into a cgroup write handler\n\nThis patch changes attach_task_by_pid() to take a u64 rather than a\nstring; as a result it can be called directly as a control groups\nwrite_u64 handler, and cgroup_common_file_write() can be removed.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "6379c106152388f7ea45d6dda63edda0e9181fc8", "tree": "ad38aad4eb0f2b4431ff15ec85c3e3aea99f7207", "parents": [ "84eea842886ac35020be6043e04748ed22014359" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Fri Jul 25 01:47:01 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:36 2008 -0700" }, "message": "cgroup files: move notify_on_release file to separate write handler\n\nThis patch moves the write handler for the cgroups notify_on_release\nfile into a separate handler. This handler requires no cgroups locking\nsince it relies on atomic bitops for synchronization.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "84eea842886ac35020be6043e04748ed22014359", "tree": "acd2bb7c3bc267a032b5e637c598708f38c68cb3", "parents": [ "e788e066c651b1bbf4a927dc95395c1aa13be436" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Fri Jul 25 01:47:00 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:35 2008 -0700" }, "message": "cgroups: misc cleanups to write_string patchset\n\nThis patch contains cleanups suggested by reviewers for the recent\nwrite_string() patchset:\n\n- pair cgroup_lock_live_group() with cgroup_unlock() in cgroup.c for\n clarity, rather than directly unlocking cgroup_mutex.\n\n- make the return type of cgroup_lock_live_group() a bool\n\n- use a #define\u0027d constant for the local buffer size in read/write functions\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "e788e066c651b1bbf4a927dc95395c1aa13be436", "tree": "8ffb80dc5917ba5b77e17ab2b71afcea3aadfef8", "parents": [ "db3b14978abc02041046ed8353f0899cb58ffffc" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Fri Jul 25 01:46:59 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:35 2008 -0700" }, "message": "cgroup files: move the release_agent file to use typed handlers\n\nAdds cgroup_release_agent_write() and cgroup_release_agent_show()\nmethods to handle writing/reading the path to a cgroup hierarchy\u0027s\nrelease agent. As a result, cgroup_common_file_read() is now unnecessary.\n\nAs part of the change, a previously-tolerated race in\ncgroup_release_agent() is avoided by copying the current\nrelease_agent_path prior to calling call_usermode_helper().\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "db3b14978abc02041046ed8353f0899cb58ffffc", "tree": "355ba027c6354bd13bcbb5318e8478b3de4599e9", "parents": [ "ce16b49d37e748574f7fabc2726268d542d0aa1a" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Fri Jul 25 01:46:58 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:35 2008 -0700" }, "message": "cgroup files: add write_string cgroup control file method\n\nThis patch adds a write_string() method for cgroups control files. The\nsemantics are that a buffer is copied from userspace to kernelspace\nand the handler function invoked on that buffer. The buffer is\nguaranteed to be nul-terminated, and no longer than max_write_len\n(defaulting to 64 bytes if unspecified). Later patches will convert\nexisting raw file write handlers in control group subsystems to use\nthis method.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nAcked-by: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "8947f9d5b361ce927be6d5c11fed57905b7a4100", "tree": "f4a7d212cfef8889a60022c8ff3c9cfcf97962c2", "parents": [ "71cbb949d17d4d776abd547135feb7f3282405c8" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Fri Jul 25 01:46:56 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:35 2008 -0700" }, "message": "cgroups: annotate two variables with __read_mostly\n\n- need_forkexit_callback will be read only after system boot.\n- use_task_css_set_links will be read only after it\u0027s set.\n\nAnd these 2 variables are checked when a new process is forked.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-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": "71cbb949d17d4d776abd547135feb7f3282405c8", "tree": "decd47a6cb05a36bb8a2f224b50bd12a8acc862e", "parents": [ "f2992db2a4f7ae10f61d5bc68c7c1528cec639e2" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Fri Jul 25 01:46:55 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:35 2008 -0700" }, "message": "cgroup: list_for_each cleanup\n\n--------------------------\nwhile() {\n\tlist_entry();\n\t...\n}\n--------------------------\n\nis equivalent to following code.\n\n--------------------------\nlist_for_each_entry(){\n\t...\n}\n--------------------------\n\nlater can review easily more.\n\nthis patch is just clean up.\nit doesn\u0027t have any behavor change.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.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": "7e9abd89cbdf9b73d327d8173343abce9022609b", "tree": "7e738e46ba5e384fc6bc984196ed2d09a0ea8102", "parents": [ "9d96d82da437ed5f2053821779ed5d7797ed1f81" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Fri Jul 25 01:46:54 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 25 10:53:35 2008 -0700" }, "message": "cgroup: use read lock to guard find_existing_css_set()\n\nThe function does not modify anything (except the temporary css template), so\nit\u0027s sufficient to hold read lock.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.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": "5c02b575780d0d785815a1e7b79a98edddee895a", "tree": "d77562541d5bdf30c19219f0af0db59162359963", "parents": [ "12d15f0d51d47cec39d1d7250e81573c5cbd8b5d" ], "author": { "name": "Cedric Le Goater", "email": "clg@fr.ibm.com", "time": "Fri May 23 13:05:02 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat May 24 09:56:14 2008 -0700" }, "message": "cgroups: remove node_ prefix_from ns subsystem\n\nThis is a slight change in the namespace cgroup subsystem api.\n\nThe change is that previously when cgroup_clone() was called (currently\nonly from the unshare path in ns_proxy cgroup, you\u0027d get a new group named\n\"node_$pid\" whereas now you\u0027ll get a group named after just your pid.)\n\nThe only users who would notice it are those who are using the ns_proxy\ncgroup subsystem to auto-create cgroups when namespaces are unshared -\nsomething of an experimental feature, which I think really needs more\ncomplete container/namespace support in order to be useful. I suspect the\nonly users are Cedric and Serge, or maybe a few others on\ncontainers@lists.linux-foundation.org. And in fact it would only be\nnoticed by the users who make the assumption about how the name is\ngenerated, rather than getting it from the /proc/\u003cpid\u003e/cgroups file for\nthe process in question.\n\nWhether the change is actually needed or not I\u0027m fairly agnostic on, but I\nguess it is more elegant to just use the pid as the new group name rather\nthan adding a fairly arbitrary \"node_\" prefix on the front.\n\n[menage@google.com: provided changelog]\nSigned-off-by: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: \"Paul Menage\" \u003cmenage@google.com\u003e\nCc: \"Serge E. Hallyn\" \u003cserue@us.ibm.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e4ad08fe64afca4ef79ecc4c624e6e871688da0d", "tree": "5b8b390b874700041dc0c095e8ba9ac3ed42ea77", "parents": [ "76f1418b485da2707531178e517bbb5cf06b3c76" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Wed Apr 30 00:54:37 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:50 2008 -0700" }, "message": "mm: bdi: add separate writeback accounting capability\n\nAdd a new BDI capability flag: BDI_CAP_NO_ACCT_WB. If this flag is\nset, then don\u0027t update the per-bdi writeback stats from\ntest_set_page_writeback() and test_clear_page_writeback().\n\nMisc cleanups:\n\n - convert bdi_cap_writeback_dirty() and friends to static inline functions\n - create a flag that includes all three dirty/writeback related flags,\n since almst all users will want to have them toghether\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cf475ad28ac35cc9ba612d67158f29b73b38b05d", "tree": "2c7cd568d00357bd42643ea602884e731cc24f26", "parents": [ "29486df325e1fe6e1764afcb19e3370804c2b002" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Tue Apr 29 01:00:16 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "cgroups: add an owner to the mm_struct\n\nRemove the mem_cgroup member from mm_struct and instead adds an owner.\n\nThis approach was suggested by Paul Menage. The advantage of this approach\nis that, once the mm-\u003eowner is known, using the subsystem id, the cgroup\ncan be determined. It also allows several control groups that are\nvirtually grouped by mm_struct, to exist independent of the memory\ncontroller i.e., without adding mem_cgroup\u0027s for each controller, to\nmm_struct.\n\nA new config option CONFIG_MM_OWNER is added and the memory resource\ncontroller selects this config option.\n\nThis patch also adds cgroup callbacks to notify subsystems when mm-\u003eowner\nchanges. The mm_cgroup_changed callback is called with the task_lock() of\nthe new task held and is called just prior to changing the mm-\u003eowner.\n\nI am indebted to Paul Menage for the several reviews of this patchset and\nhelping me make it lighter and simpler.\n\nThis patch was tested on a powerpc box, it was compiled with both the\nMM_OWNER config turned on and off.\n\nAfter the thread group leader exits, it\u0027s moved to init_css_state by\ncgroup_exit(), thus all future charges from runnings threads would be\nredirected to the init_css_set\u0027s subsystem.\n\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Sudhir Kumar \u003cskumar@linux.vnet.ibm.com\u003e\nCc: YAMAMOTO Takashi \u003cyamamoto@valinux.co.jp\u003e\nCc: Hirokazu Takahashi \u003ctaka@valinux.co.jp\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e,\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nReviewed-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "29486df325e1fe6e1764afcb19e3370804c2b002", "tree": "d69a96bb829940f3ae5171fde481edb20a9e468a", "parents": [ "28fd5dfc12bde391981dfdcf20755952b6e916af" ], "author": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Tue Apr 29 01:00:14 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "cgroups: introduce cft-\u003eread_seq()\n\nIntroduce a read_seq() helper in cftype, which uses seq_file to print out\nlists. Use it in the devices cgroup. Also split devices.allow into two\nfiles, so now devices.deny and devices.allow are the ones to use to manipulate\nthe whitelist, while devices.list outputs the cgroup\u0027s current whitelist.\n\nSigned-off-by: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "28fd5dfc12bde391981dfdcf20755952b6e916af", "tree": "ce0637c3f8c04d802b467cd518a9d0c076f1eeea", "parents": [ "e8d55fdeb882cfcb5e8db5a5ce16edfba78aafc5" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Apr 29 01:00:13 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "cgroups: remove the css_set linked-list\n\nNow we can run through the hash table instead of running through the\nlinked-list.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nReviewed-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "e8d55fdeb882cfcb5e8db5a5ce16edfba78aafc5", "tree": "0c0a7338d8adb2aaf4310eb89d1679c802ea617d", "parents": [ "472b1053f3c319cc60bfb2a0bb062fed77a93eb6" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Apr 29 01:00:13 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "cgroups: simplify init_subsys()\n\nWe are at system boot and there is only 1 cgroup group (i,e, init_css_set), so\nwe don\u0027t need to run through the css_set linked list. Neither do we need to\nrun through the task list, since no processes have been created yet.\n\nAlso referring to a comment in cgroup.h:\n\nstruct css_set\n{\n\t...\n\t/*\n\t * Set of subsystem states, one for each subsystem. This array\n\t * is immutable after creation apart from the init_css_set\n\t * during subsystem registration (at boot time).\n\t */\n\tstruct cgroup_subsys_state *subsys[CGROUP_SUBSYS_COUNT];\n}\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nReviewed-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "472b1053f3c319cc60bfb2a0bb062fed77a93eb6", "tree": "2ef88bfdb7e397d3718a1bed38f13194f894097e", "parents": [ "08ce5f16ee466ffc5bf243800deeecd77d9eaf50" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Apr 29 01:00:11 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:09 2008 -0700" }, "message": "cgroups: use a hash table for css_set finding\n\nWhen we attach a process to a different cgroup, the css_set linked-list will\nbe run through to find a suitable existing css_set to use. This patch\nimplements a hash table for better performance.\n\nThe following benchmarks have been tested:\n\nFor N in 1, 5, 10, 50, 100, 500, 1000, create N cgroups with one sleeping\ntask in each, and then move an additional task through each cgroup in\nturn.\n\nHere is a test result:\n\nN\tLoop\torig - Time(s)\thash - Time(s)\n----------------------------------------------\n1\t10000\t1.201231728\t1.196311177\n5\t2000\t1.065743872\t1.040566424\n10\t1000\t0.991054735\t0.986876440\n50\t200\t0.976554203\t0.969608733\n100\t100\t0.998504680\t0.969218270\n500\t20\t1.157347764\t0.962602963\n1000\t10\t1.619521852\t1.085140172\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nReviewed-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "d447ea2f30ec60370ddb99a668e5ac12995f043d", "tree": "f5d53c03d32323f3e916237f8ec0e0b2572f93b0", "parents": [ "46ae220bea40bd1cf4abec2d5cdfb4f9396c7115" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Tue Apr 29 01:00:08 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:09 2008 -0700" }, "message": "cgroups: add the trigger callback to struct cftype\n\nTrigger callback can be used to receive a kick-up from the user space. The\nstring written is ignored.\n\nThe cftype-\u003eprivate is used for multiplexing events.\n\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "46ae220bea40bd1cf4abec2d5cdfb4f9396c7115", "tree": "e485a13dd8d85d2f40ecf73d9482671dc39ceab1", "parents": [ "06a119204d3e1e67d393e996ed987b0df7998381" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Apr 29 01:00:08 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:09 2008 -0700" }, "message": "cgroup: switch to proc_create()\n\nThere is a race between create_proc_entry() and the assignment of file ops.\nproc_create() is invented to fix it.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Paul Menage \u003cmenage@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": "06a119204d3e1e67d393e996ed987b0df7998381", "tree": "0cf3798102d13252d33c9907888a9608a0af6f96", "parents": [ "06ecb27cfbf53ac2c7e397aa1619a6f9a98c5896" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Apr 29 01:00:07 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:09 2008 -0700" }, "message": "cgroup: annotate cgroup_init_subsys with __init\n\nIt is called by cgroup_init() and cgroup_init_early() only, which are\nannotated with __init.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@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": "e73d2c61d1fcbd3621688ae457b49509c8d4c601", "tree": "e54b1543e786afd036b7884776a6753d8a8973f6", "parents": [ "418d7d875ce7f33ef0d48d7cc3a95f31302dcf56" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Tue Apr 29 01:00:06 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:09 2008 -0700" }, "message": "CGroups _s64 files: add cgroups read_s64/write_s64 file methods\n\nThese patches add cgroups read_s64 and write_s64 control file methods (the\nsigned equivalent of read_u64/write_u64) and use them to implement the\ncpu.rt_runtime_us control file in the CFS cgroup subsystem.\n\nThis patch:\n\nThese are the signed equivalents of the read_u64/write_u64 methods\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\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" } ], "next": "3116f0e3df0a67ad56f15dd4c5f6cefb04bb4a98" }