)]}' { "log": [ { "commit": "5f24ce5fd34c3ca1b3d10d30da754732da64d5c0", "tree": "c82d27461f2adda210e77808b7dd04eaec017f2f", "parents": [ "21ae5b01750f14140809508a478a4413792e0261" ], "author": { "name": "Andrea Arcangeli", "email": "aarcange@redhat.com", "time": "Thu Jan 13 15:47:00 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 17:32:43 2011 -0800" }, "message": "thp: remove PG_buddy\n\nPG_buddy can be converted to _mapcount \u003d\u003d -2. So the PG_compound_lock can\nbe added to page-\u003eflags without overflowing (because of the sparse section\nbits increasing) with CONFIG_X86_PAE\u003dy and CONFIG_X86_PAT\u003dy. This also\nhas to move the memory hotplug code from _mapcount to lru.next to avoid\nany risk of clashes. We can\u0027t use lru.next for PG_buddy removal, but\nmemory hotplug can use lru.next even more easily than the mapcount\ninstead.\n\nSigned-off-by: Andrea Arcangeli \u003caarcange@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": "79134171df238171daa4c024a42b77b401ccb00b", "tree": "af7872d5851e371d09b9fe7eb80f4809713c79fb", "parents": [ "b9bbfbe30ae088cc88a4b2ba7732baeebd1a0162" ], "author": { "name": "Andrea Arcangeli", "email": "aarcange@redhat.com", "time": "Thu Jan 13 15:46:58 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 17:32:43 2011 -0800" }, "message": "thp: transparent hugepage vmstat\n\nAdd hugepage stat information to /proc/vmstat and /proc/meminfo.\n\nSigned-off-by: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nAcked-by: Rik van Riel \u003criel@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": "dabb16f639820267b3850d804571c70bd93d4e07", "tree": "7da59e6133cd2f820389574ac9206c56e046f5d4", "parents": [ "d0a21265dfb5fa8ae54e90d0fb6d1c215b10a28a" ], "author": { "name": "Mandeep Singh Baines", "email": "msb@chromium.org", "time": "Thu Jan 13 15:46:05 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 17:32:35 2011 -0800" }, "message": "oom: allow a non-CAP_SYS_RESOURCE proces to oom_score_adj down\n\nWe\u0027d like to be able to oom_score_adj a process up/down as it\nenters/leaves the foreground. Currently, it is not possible to oom_adj\ndown without CAP_SYS_RESOURCE. This patch allows a task to decrease its\noom_score_adj back to the value that a CAP_SYS_RESOURCE thread set it to\nor its inherited value at fork. Assuming the thread that has forked it\nhas oom_score_adj of 0, each process could decrease it back from 0 upon\nactivation unless a CAP_SYS_RESOURCE thread elevated it to something\nhigher.\n\nAlternative considered:\n\n* a setuid binary\n* a daemon with CAP_SYS_RESOURCE\n\nSince you don\u0027t wan\u0027t all processes to be able to reduce their oom_adj, a\nsetuid or daemon implementation would be complex. The alternatives also\nhave much higher overhead.\n\nThis patch updated from original patch based on feedback from David\nRientjes.\n\nSigned-off-by: Mandeep Singh Baines \u003cmsb@chromium.org\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Ying Han \u003cyinghan@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": "2d90508f638241a2e7422d884767398296ebe720", "tree": "5b80c4919d924ab76c02b629465cbc7820010a53", "parents": [ "62c70bce8ac236514c610020bb1ae5b8bde965cb" ], "author": { "name": "Nikanth Karthikesan", "email": "knikanth@suse.de", "time": "Thu Jan 13 15:45:53 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 17:32:33 2011 -0800" }, "message": "mm: smaps: export mlock information\n\nCurrently there is no way to find whether a process has locked its pages\nin memory or not. And which of the memory regions are locked in memory.\n\nAdd a new field \"Locked\" to export this information via the smaps file.\n\nSigned-off-by: Nikanth Karthikesan \u003cknikanth@suse.de\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nAcked-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ceff1a770933e2ca2bf995b453dade4ec47a9878", "tree": "7c132b0a68a76fc27c5e1e12fef17f208ce924b8", "parents": [ "bf33cbdf8acccf96de268fbfb347d94e72de81ef" ], "author": { "name": "Dave Anderson", "email": "anderson@redhat.com", "time": "Wed Jan 12 17:00:36 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 08:03:17 2011 -0800" }, "message": "/proc/kcore: fix seeking\n\nCommit 34aacb2920 (\"procfs: Use generic_file_llseek in /proc/kcore\") broke\nseeking on /proc/kcore. This changes it back to use default_llseek in\norder to restore the original behavior.\n\nThe problem with generic_file_llseek is that it only allows seeks up to\ninode-\u003ei_sb-\u003es_maxbytes, which is 2GB-1 on procfs, where the memory file\noffset values in the /proc/kcore PT_LOAD segments may exceed or start\nbeyond that offset value.\n\nA similar revert was made for /proc/vmcore.\n\nSigned-off-by: Dave Anderson \u003canderson@redhat.com\u003e\nAcked-by: Frederic Weisbecker \u003cfweisbec@gmail.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": "bf33cbdf8acccf96de268fbfb347d94e72de81ef", "tree": "cc859c9a4f5f38a8452abfe1a79af13900e35421", "parents": [ "3740a20c4fe8697cb604a7d51395d23472b1768f" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Wed Jan 12 17:00:36 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 08:03:17 2011 -0800" }, "message": "proc: move proc_console.c to fs/proc/consoles.c\n\nFilename is supposed to match procfile name for random junk.\n\nAdd __init while I\u0027m at it.\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": "3740a20c4fe8697cb604a7d51395d23472b1768f", "tree": "dac4b07e654742bc60fad44c55327d8b3f86e4b3", "parents": [ "a6fc86d2b43bf1086557f023a24adf91db915559" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Wed Jan 12 17:00:35 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 08:03:17 2011 -0800" }, "message": "proc: less LOCK/UNLOCK in remove_proc_entry()\n\nFor the common case where a proc entry is being removed and nobody is in\nthe process of using it, save a LOCK/UNLOCK pair.\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": "a6fc86d2b43bf1086557f023a24adf91db915559", "tree": "4ad1a6f004d50c21bdce5b14d8f78fef3f453670", "parents": [ "c6a340584607f653e10549c76dd427d4780c8f2c" ], "author": { "name": "Petr Holasek", "email": "pholasek@redhat.com", "time": "Wed Jan 12 17:00:34 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 08:03:17 2011 -0800" }, "message": "kpagecount: add slab page checking because _mapcount is in a union\n\nAdd a PageSlab() check before adding the _mapcount value to /kpagecount.\npage-\u003e_mapcount is in a union with the SLAB structure so for pages\ncontrolled by SLAB, page_mapcount() returns nonsense.\n\nSigned-off-by: Petr Holasek \u003cpholasek@redhat.com\u003e\nCc: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c6a340584607f653e10549c76dd427d4780c8f2c", "tree": "20e82a1dd34f4b2f7477bf02b398759ba026d772", "parents": [ "6d1b6e4eff89475785f60fa00f65da780f869f36" ], "author": { "name": "Jovi Zhang", "email": "bookjovi@gmail.com", "time": "Wed Jan 12 17:00:34 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 08:03:16 2011 -0800" }, "message": "proc: use single_open() correctly\n\nsingle_open()\u0027s third argument is for copying into seq_file-\u003eprivate. Use\nthat, rather than open-coding it.\n\nSigned-off-by: Jovi Zhang \u003cbookjovi@gmail.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6d1b6e4eff89475785f60fa00f65da780f869f36", "tree": "41608a81f14b824c97b8d8f0849aff04bcf1f537", "parents": [ "9d6de12f70d2fb1487c4f482a21fed25fe74e0fd" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Wed Jan 12 17:00:33 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 08:03:16 2011 -0800" }, "message": "proc: -\u003elow_ino cleanup\n\n- -\u003elow_ino is write-once field -- reading it under locks is unnecessary.\n\n- /proc/$PID stuff never reaches pde_put()/free_proc_entry() --\n PROC_DYNAMIC_FIRST check never triggers.\n\n- in proc_get_inode(), inode number always matches proc dir entry, so\n save one parameter.\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": "9d6de12f70d2fb1487c4f482a21fed25fe74e0fd", "tree": "a5bc7cb77c710418c44e2b1c009e80d79e12e3ab", "parents": [ "a2ade7b6ca37c808128810687cd56e8a44443e65" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Wed Jan 12 17:00:32 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 08:03:16 2011 -0800" }, "message": "proc: use seq_puts()/seq_putc() where possible\n\nFor string without format specifiers, use seq_puts().\nFor seq_printf(\"\\n\"), use seq_putc(\u0027\\n\u0027).\n\n text\t data\t bss\t dec\t hex\tfilename\n 61866\t 488\t 112\t 62466\t f402\tfs/proc/proc.o\n 61729\t 488\t 112\t 62329\t f379\tfs/proc/proc.o\n ----------------------------------------------------\n \t\t\t -139\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": "a2ade7b6ca37c808128810687cd56e8a44443e65", "tree": "d7ffb1be14e69f4ba22ca425c21369d4dd3a3032", "parents": [ "34e49d4f635d6a800c4089c40fd254e12e451449" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Wed Jan 12 17:00:32 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 08:03:16 2011 -0800" }, "message": "proc: use unsigned long inside /proc/*/statm\n\n/proc/*/statm code needlessly truncates data from unsigned long to int.\nOne needs only 8+ TB of RAM to make truncation visible.\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nReviewed-by: WANG Cong \u003cxiyou.wangcong@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": "34e49d4f635d6a800c4089c40fd254e12e451449", "tree": "097715098524f7cf997f5646af75f839b3744fa0", "parents": [ "1bdcd78e2445f1ef7097a3ae7ef12e8f9c4fb05f" ], "author": { "name": "Joe Perches", "email": "joe@perches.com", "time": "Wed Jan 12 17:00:30 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 08:03:16 2011 -0800" }, "message": "fs/proc/base.c, kernel/latencytop.c: convert sprintf_symbol() to %ps\n\nUse temporary lr for struct latency_record for improved readability and\nfewer columns used. Removed trailing space from output.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Joe Perches \u003cjoe@perches.com\u003e\nCc: Jiri Kosina \u003ctrivial@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": "56b85f32d530d09d6805488ad00775d4e0e3baab", "tree": "e7fbe69e338ef775d3b2dd822aa915d259b4bc94", "parents": [ "3e5b08cbbf78bedd316904ab0cf3b27119433ee5", "568389c257fa7d74ce36c2f78bad31965fded4cf" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jan 07 14:39:20 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jan 07 14:39:20 2011 -0800" }, "message": "Merge branch \u0027tty-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6\n\n* \u0027tty-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (36 commits)\n serial: apbuart: Fixup apbuart_console_init()\n TTY: Add tty ioctl to figure device node of the system console.\n tty: add \u0027active\u0027 sysfs attribute to tty0 and console device\n drivers: serial: apbuart: Handle OF failures gracefully\n Serial: Avoid unbalanced IRQ wake disable during resume\n tty: fix typos/errors in tty_driver.h comments\n pch_uart : fix warnings for 64bit compile\n 8250: fix uninitialized FIFOs\n ip2: fix compiler warning on ip2main_pci_tbl\n specialix: fix compiler warning on specialix_pci_tbl\n rocket: fix compiler warning on rocket_pci_ids\n 8250: add a UPIO_DWAPB32 for 32 bit accesses\n 8250: use container_of() instead of casting\n serial: omap-serial: Add support for kernel debugger\n serial: fix pch_uart kconfig \u0026 build\n drivers: char: hvc: add arm JTAG DCC console support\n RS485 documentation: add 16C950 UART description\n serial: ifx6x60: fix memory leak\n serial: ifx6x60: free IRQ on error\n Serial: EG20T: add PCH_UART driver\n ...\n\nFixed up conflicts in drivers/serial/apbuart.c with evil merge that\nmakes the code look fairly sane (unlike either side).\n" }, { "commit": "b4a45f5fe8078bfc10837dbd5b98735058bc4698", "tree": "df6f13a27610a3ec7eb4a661448cd779a8f84c79", "parents": [ "01539ba2a706ab7d35fc0667dff919ade7f87d63", "b3e19d924b6eaf2ca7d22cba99a517c5171007b6" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jan 07 08:56:33 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jan 07 08:56:33 2011 -0800" }, "message": "Merge branch \u0027vfs-scale-working\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin\n\n* \u0027vfs-scale-working\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin: (57 commits)\n fs: scale mntget/mntput\n fs: rename vfsmount counter helpers\n fs: implement faster dentry memcmp\n fs: prefetch inode data in dcache lookup\n fs: improve scalability of pseudo filesystems\n fs: dcache per-inode inode alias locking\n fs: dcache per-bucket dcache hash locking\n bit_spinlock: add required includes\n kernel: add bl_list\n xfs: provide simple rcu-walk ACL implementation\n btrfs: provide simple rcu-walk ACL implementation\n ext2,3,4: provide simple rcu-walk ACL implementation\n fs: provide simple rcu-walk generic_check_acl implementation\n fs: provide rcu-walk aware permission i_ops\n fs: rcu-walk aware d_revalidate method\n fs: cache optimise dentry and inode for rcu-walk\n fs: dcache reduce branches in lookup path\n fs: dcache remove d_mounted\n fs: fs_struct use seqlock\n fs: rcu-walk for path lookup\n ...\n" }, { "commit": "b74c79e99389cd79b31fcc08f82c24e492e63c7e", "tree": "763c6b412517306670bc625e90035f2d16bb739f", "parents": [ "34286d6662308d82aed891852d04c7c3a2649b16" ], "author": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:49:58 2011 +1100" }, "committer": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:29 2011 +1100" }, "message": "fs: provide rcu-walk aware permission i_ops\n\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n" }, { "commit": "34286d6662308d82aed891852d04c7c3a2649b16", "tree": "c4b7311404d302e7cb94df7a4690298e1059910a", "parents": [ "44a7d7a878c9cbb74f236ea755b25b6b2e26a9a9" ], "author": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:49:57 2011 +1100" }, "committer": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:29 2011 +1100" }, "message": "fs: rcu-walk aware d_revalidate method\n\nRequire filesystems be aware of .d_revalidate being called in rcu-walk\nmode (nd-\u003eflags \u0026 LOOKUP_RCU). For now do a simple push down, returning\n-ECHILD from all implementations.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n" }, { "commit": "fb045adb99d9b7c562dc7fef834857f78249daa1", "tree": "1fd6a4024fffeec568abe100d730589bfdb81c38", "parents": [ "5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff" ], "author": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:49:55 2011 +1100" }, "committer": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:28 2011 +1100" }, "message": "fs: dcache reduce branches in lookup path\n\nReduce some branches and memory accesses in dcache lookup by adding dentry\nflags to indicate common d_ops are set, rather than having to check them.\nThis saves a pointer memory access (dentry-\u003ed_op) in common path lookup\nsituations, and saves another pointer load and branch in cases where we\nhave d_op but not the particular operation.\n\nPatched with:\n\ngit grep -E \u0027[.\u003e]([[:space:]])*d_op([[:space:]])*\u003d\u0027 | xargs sed -e \u0027s/\\([^\\t ]*\\)-\u003ed_op \u003d \\(.*\\);/d_set_d_op(\\1, \\2);/\u0027 -e \u0027s/\\([^\\t ]*\\)\\.d_op \u003d \\(.*\\);/d_set_d_op(\\\u0026\\1, \\2);/\u0027 -i\n\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n" }, { "commit": "31e6b01f4183ff419a6d1f86177cbf4662347cec", "tree": "e215ec9af88352c55e024f784f3d9f8eb13fab85", "parents": [ "3c22cd5709e8143444a6d08682a87f4c57902df3" ], "author": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:49:52 2011 +1100" }, "committer": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:27 2011 +1100" }, "message": "fs: rcu-walk for path lookup\n\nPerform common cases of path lookups without any stores or locking in the\nancestor dentry elements. This is called rcu-walk, as opposed to the current\nalgorithm which is a refcount based walk, or ref-walk.\n\nThis results in far fewer atomic operations on every path element,\nsignificantly improving path lookup performance. It also avoids cacheline\nbouncing on common dentries, significantly improving scalability.\n\nThe overall design is like this:\n* LOOKUP_RCU is set in nd-\u003eflags, which distinguishes rcu-walk from ref-walk.\n* Take the RCU lock for the entire path walk, starting with the acquiring\n of the starting path (eg. root/cwd/fd-path). So now dentry refcounts are\n not required for dentry persistence.\n* synchronize_rcu is called when unregistering a filesystem, so we can\n access d_ops and i_ops during rcu-walk.\n* Similarly take the vfsmount lock for the entire path walk. So now mnt\n refcounts are not required for persistence. Also we are free to perform mount\n lookups, and to assume dentry mount points and mount roots are stable up and\n down the path.\n* Have a per-dentry seqlock to protect the dentry name, parent, and inode,\n so we can load this tuple atomically, and also check whether any of its\n members have changed.\n* Dentry lookups (based on parent, candidate string tuple) recheck the parent\n sequence after the child is found in case anything changed in the parent\n during the path walk.\n* inode is also RCU protected so we can load d_inode and use the inode for\n limited things.\n* i_mode, i_uid, i_gid can be tested for exec permissions during path walk.\n* i_op can be loaded.\n\nWhen we reach the destination dentry, we lock it, recheck lookup sequence,\nand increment its refcount and mountpoint refcount. RCU and vfsmount locks\nare dropped. This is termed \"dropping rcu-walk\". If the dentry refcount does\nnot match, we can not drop rcu-walk gracefully at the current point in the\nlokup, so instead return -ECHILD (for want of a better errno). This signals the\npath walking code to re-do the entire lookup with a ref-walk.\n\nAside from the final dentry, there are other situations that may be encounted\nwhere we cannot continue rcu-walk. In that case, we drop rcu-walk (ie. take\na reference on the last good dentry) and continue with a ref-walk. Again, if\nwe can drop rcu-walk gracefully, we return -ECHILD and do the whole lookup\nusing ref-walk. But it is very important that we can continue with ref-walk\nfor most cases, particularly to avoid the overhead of double lookups, and to\ngain the scalability advantages on common path elements (like cwd and root).\n\nThe cases where rcu-walk cannot continue are:\n* NULL dentry (ie. any uncached path element)\n* parent with d_inode-\u003ei_op-\u003epermission or ACLs\n* dentries with d_revalidate\n* Following links\n\nIn future patches, permission checks and d_revalidate become rcu-walk aware. It\nmay be possible eventually to make following links rcu-walk aware.\n\nUncached path elements will always require dropping to ref-walk mode, at the\nvery least because i_mutex needs to be grabbed, and objects allocated.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n" }, { "commit": "fa0d7e3de6d6fc5004ad9dea0dd6b286af8f03e9", "tree": "203e0f73883e4c26b5597e36042386a1237dab35", "parents": [ "77812a1ef139d84270d27faacc0630c887411013" ], "author": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:49:49 2011 +1100" }, "committer": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:26 2011 +1100" }, "message": "fs: icache RCU free inodes\n\nRCU free the struct inode. This will allow:\n\n- Subsequent store-free path walking patch. The inode must be consulted for\n permissions when walking, so an RCU inode reference is a must.\n- sb_inode_list_lock to be moved inside i_lock because sb list walkers who want\n to take i_lock no longer need to take sb_inode_list_lock to walk the list in\n the first place. This will simplify and optimize locking.\n- Could remove some nested trylock loops in dcache code\n- Could potentially simplify things a bit in VM land. Do not need to take the\n page lock to follow page-\u003emapping.\n\nThe downsides of this is the performance cost of using RCU. In a simple\ncreat/unlink microbenchmark, performance drops by about 10% due to inability to\nreuse cache-hot slab objects. As iterations increase and RCU freeing starts\nkicking over, this increases to about 20%.\n\nIn cases where inode lifetimes are longer (ie. many inodes may be allocated\nduring the average life span of a single inode), a lot of this cache reuse is\nnot applicable, so the regression caused by this patch is smaller.\n\nThe cache-hot regression could largely be avoided by using SLAB_DESTROY_BY_RCU,\nhowever this adds some complexity to list walking and store-free path walking,\nso I prefer to implement this at a later date, if it is shown to be a win in\nreal situations. I haven\u0027t found a regression in any non-micro benchmark so I\ndoubt it will be a problem.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n" }, { "commit": "621e155a3591962420eacdd39f6f0aa29ceb221e", "tree": "387a9fb396f1bf24514b712c294182e36ba51076", "parents": [ "fb2d5b86aff355a27ebfc132d3c99f4a940cc3fe" ], "author": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:49:27 2011 +1100" }, "committer": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:19 2011 +1100" }, "message": "fs: change d_compare for rcu-walk\n\nChange d_compare so it may be called from lock-free RCU lookups. This\ndoes put significant restrictions on what may be done from the callback,\nhowever there don\u0027t seem to have been any problems with in-tree fses.\nIf some strange use case pops up that _really_ cannot cope with the\nrcu-walk rules, we can just add new rcu-unaware callbacks, which would\ncause name lookup to drop out of rcu-walk mode.\n\nFor in-tree filesystems, this is just a mechanical change.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n" }, { "commit": "fe15ce446beb3a33583af81ffe6c9d01a75314ed", "tree": "bc8af66b6dd2d0f21a2a3f48a19975ae2cdbae4e", "parents": [ "5eef7fa905c814826f518aca2d414ca77508ce30" ], "author": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:49:23 2011 +1100" }, "committer": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:18 2011 +1100" }, "message": "fs: change d_delete semantics\n\nChange d_delete from a dentry deletion notification to a dentry caching\nadvise, more like -\u003edrop_inode. Require it to be constant and idempotent,\nand not take d_lock. This is how all existing filesystems use the callback\nanyway.\n\nThis makes fine grained dentry locking of dput and dentry lru scanning\nmuch simpler.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n" }, { "commit": "3c0cb7c31c206aaedb967e44b98442bbeb17a6c4", "tree": "3ecba45d7ffae4fba4a5aafaef4af5b0b1105bde", "parents": [ "f70f5b9dc74ca7d0a64c4ead3fb28da09dc1b234", "404a02cbd2ae8bf256a2fa1169bdfe86bb5ebb34" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 06 16:50:35 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 06 16:50:35 2011 -0800" }, "message": "Merge branch \u0027devel\u0027 of master.kernel.org:/home/rmk/linux-2.6-arm\n\n* \u0027devel\u0027 of master.kernel.org:/home/rmk/linux-2.6-arm: (416 commits)\n ARM: DMA: add support for DMA debugging\n ARM: PL011: add DMA burst threshold support for ST variants\n ARM: PL011: Add support for transmit DMA\n ARM: PL011: Ensure IRQs are disabled in UART interrupt handler\n ARM: PL011: Separate hardware FIFO size from TTY FIFO size\n ARM: PL011: Allow better handling of vendor data\n ARM: PL011: Ensure error flags are clear at startup\n ARM: PL011: include revision number in boot-time port printk\n ARM: vexpress: add sched_clock() for Versatile Express\n ARM i.MX53: Make MX53 EVK bootable\n ARM i.MX53: Some bug fix about MX53 MSL code\n ARM: 6607/1: sa1100: Update platform device registration\n ARM: 6606/1: sa1100: Fix platform device registration\n ARM i.MX51: rename IPU irqs\n ARM i.MX51: Add ipu clock support\n ARM: imx/mx27_3ds: Add PMIC support\n ARM: DMA: Replace page_to_dma()/dma_to_page() with pfn_to_dma()/dma_to_pfn()\n mx51: fix usb clock support\n MX51: Add support for usb host 2\n arch/arm/plat-mxc/ehci.c: fix errors/typos\n ...\n" }, { "commit": "31edf274f9aff1ccd39934a0b2fce38f4405c656", "tree": "fdc7bc445307ccb9648ca1a71375947c8ed59722", "parents": [ "3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5", "ed60453fa8f8fc3d034dfdf10371a99cc6905626", "ac61d143ffe2a6db4d4bcf47c21a5159d6a1b644", "28257f7fdee0facc3b7f934e82c2485f27120d41", "b23065313297e750edd57ab6edfd36224826724e", "50005a8deb38e5e6456ebd94e57adb321d4589de", "cf562b4a550b3cd9d602a05bc27aaaaa376947b4", "3d09fbcd26851ffb2c40cec411b8e56db02520d1", "8a9618f5dfca35edb0d7ab6374ff586e2e9e989b" ], "author": { "name": "Russell King", "email": "rmk+kernel@arm.linux.org.uk", "time": "Wed Jan 05 18:08:10 2011 +0000" }, "committer": { "name": "Russell King", "email": "rmk+kernel@arm.linux.org.uk", "time": "Wed Jan 05 18:08:10 2011 +0000" }, "message": "Merge branches \u0027ftrace\u0027, \u0027gic\u0027, \u0027io\u0027, \u0027kexec\u0027, \u0027mod\u0027, \u0027sa11x0\u0027, \u0027sh\u0027 and \u0027versatile\u0027 into devel\n" }, { "commit": "8e9255e6a2141e050d51bc4d96dbef494a87d653", "tree": "f190b142830153eaab05555a93c4f71a144ba3d4", "parents": [ "5091faa449ee0b7d73bc296a93bca9540fc51d0a", "6313e3c21743cc88bb5bd8aa72948ee1e83937b6" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Dec 08 20:15:26 2010 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Dec 08 20:15:29 2010 +0100" }, "message": "Merge branch \u0027linus\u0027 into sched/core\n\nMerge reason: we want to queue up dependent cleanup\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "7b2a69ba7055da9a04eb96aa7b38c8e3280aaaa5", "tree": "50b564e78fcb708a35ded72ed5cbd58cc12ce5c5", "parents": [ "11e8896474495dec7ce19a542f67def847ec208f" ], "author": { "name": "Eric W. Biederman", "email": "ebiederm@xmission.com", "time": "Sun Dec 05 15:51:21 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Dec 05 16:39:45 2010 -0800" }, "message": "Revert \"vfs: show unreachable paths in getcwd and proc\"\n\nBecause it caused a chroot ttyname regression in 2.6.36.\n\nAs of 2.6.36 ttyname does not work in a chroot. It has already been\nreported that screen breaks, and for me this breaks an automated\ndistribution testsuite, that I need to preserve the ability to run the\nexisting binaries on for several more years. glibc 2.11.3 which has a\nfix for this is not an option.\n\nThe root cause of this breakage is:\n\n commit 8df9d1a4142311c084ffeeacb67cd34d190eff74\n Author: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\n Date: Tue Aug 10 11:41:41 2010 +0200\n\n vfs: show unreachable paths in getcwd and proc\n\n Prepend \"(unreachable)\" to path strings if the path is not reachable\n from the current root.\n\n Two places updated are\n - the return string from getcwd()\n - and symlinks under /proc/$PID.\n\n Other uses of d_path() are left unchanged (we know that some old\n software crashes if /proc/mounts is changed).\n\n Signed-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\n Signed-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n\nSo remove the nice sounding, but ultimately ill advised change to how\n/proc/fd symlinks work.\n\nSigned-off-by: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5091faa449ee0b7d73bc296a93bca9540fc51d0a", "tree": "55f5e96e189af65c85c769fce48627b8a5abb86b", "parents": [ "822bc180a7f7a7bc5fcaaea195f41b487cc8cae8" ], "author": { "name": "Mike Galbraith", "email": "efault@gmx.de", "time": "Tue Nov 30 14:18:03 2010 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Nov 30 16:03:35 2010 +0100" }, "message": "sched: Add \u0027autogroup\u0027 scheduling feature: automated per session task groups\n\nA recurring complaint from CFS users is that parallel kbuild has\na negative impact on desktop interactivity. This patch\nimplements an idea from Linus, to automatically create task\ngroups. Currently, only per session autogroups are implemented,\nbut the patch leaves the way open for enhancement.\n\nImplementation: each task\u0027s signal struct contains an inherited\npointer to a refcounted autogroup struct containing a task group\npointer, the default for all tasks pointing to the\ninit_task_group. When a task calls setsid(), a new task group\nis created, the process is moved into the new task group, and a\nreference to the preveious task group is dropped. Child\nprocesses inherit this task group thereafter, and increase it\u0027s\nrefcount. When the last thread of a process exits, the\nprocess\u0027s reference is dropped, such that when the last process\nreferencing an autogroup exits, the autogroup is destroyed.\n\nAt runqueue selection time, IFF a task has no cgroup assignment,\nits current autogroup is used.\n\nAutogroup bandwidth is controllable via setting it\u0027s nice level\nthrough the proc filesystem:\n\n cat /proc/\u003cpid\u003e/autogroup\n\nDisplays the task\u0027s group and the group\u0027s nice level.\n\n echo \u003cnice level\u003e \u003e /proc/\u003cpid\u003e/autogroup\n\nSets the task group\u0027s shares to the weight of nice \u003clevel\u003e task.\nSetting nice level is rate limited for !admin users due to the\nabuse risk of task group locking.\n\nThe feature is enabled from boot by default if\nCONFIG_SCHED_AUTOGROUP\u003dy is selected, but can be disabled via\nthe boot option noautogroup, and can also be turned on/off on\nthe fly via:\n\n echo [01] \u003e /proc/sys/kernel/sched_autogroup_enabled\n\n... which will automatically move tasks to/from the root task group.\n\nSigned-off-by: Mike Galbraith \u003cefault@gmx.de\u003e\nAcked-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Markus Trippelsdorf \u003cmarkus@trippelsdorf.de\u003e\nCc: Mathieu Desnoyers \u003cmathieu.desnoyers@efficios.com\u003e\nCc: Paul Turner \u003cpjt@google.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n[ Removed the task_group_path() debug code, and fixed !EVENTFD build failure. ]\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nLKML-Reference: \u003c1290281700.28711.9.camel@maggy.simson.net\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "9833c39400c3e6ee19daeded6910df648741611e", "tree": "49fde990e2f08c5751f9f6923d32812580f87ff2", "parents": [ "e8a7e48bb248a1196484d3f8afa53bded2b24e71" ], "author": { "name": "Mika Westerberg", "email": "mika.westerberg@iki.fi", "time": "Fri Nov 19 09:29:24 2010 +0100" }, "committer": { "name": "Russell King", "email": "rmk+kernel@arm.linux.org.uk", "time": "Tue Nov 30 13:39:55 2010 +0000" }, "message": "ARM: 6485/5: proc/vmcore - allow archs to override vmcore_elf_check_arch()\n\nAllow architectures to redefine this macro if needed. This is useful for\nexample in architectures where 64-bit ELF vmcores are not supported.\nSpecifying zero vmcore_elf64_check_arch() allows compiler to optimize\naway unnecessary parts of parse_crash_elf64_headers().\n\nWe also rename the macro to vmcore_elf64_check_arch() to reflect that it\nis used for 64-bit vmcores only.\n\nSigned-off-by: Mika Westerberg \u003cmika.westerberg@iki.fi\u003e\nSigned-off-by: Russell King \u003crmk+kernel@arm.linux.org.uk\u003e\n" }, { "commit": "ea251c1d5c481cda1cf6b0c9e4965f04a6cf2ffc", "tree": "989753f439461fb333432761b8bf39d408572c62", "parents": [ "5f0af70a25593a9d53b87bc8d31902fb7cc63e40" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Wed Nov 24 12:57:13 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Nov 25 06:50:46 2010 +0900" }, "message": "pagemap: set pagemap walk limit to PMD boundary\n\nCurrently one pagemap_read() call walks in PAGEMAP_WALK_SIZE bytes (\u003d\u003d 512\npages.) But there is a corner case where walk_pmd_range() accidentally\nruns over a VMA associated with a hugetlbfs file.\n\nFor example, when a process has mappings to VMAs as shown below:\n\n # cat /proc/\u003cpid\u003e/maps\n ...\n 3a58f6d000-3a58f72000 rw-p 00000000 00:00 0\n 7fbd51853000-7fbd51855000 rw-p 00000000 00:00 0\n 7fbd5186c000-7fbd5186e000 rw-p 00000000 00:00 0\n 7fbd51a00000-7fbd51c00000 rw-s 00000000 00:12 8614 /hugepages/test\n\nthen pagemap_read() goes into walk_pmd_range() path and walks in the range\n0x7fbd51853000-0x7fbd51a53000, but the hugetlbfs VMA should be handled by\nwalk_hugetlb_range(). Otherwise PMD for the hugepage is considered bad\nand cleared, which causes undesirable results.\n\nThis patch fixes it by separating pagemap walk range into one PMD.\n\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nCc: Jun\u0027ichi Nomura \u003cj-nomura@ce.jp.nec.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "451a3c24b0135bce54542009b5fde43846c7cf67", "tree": "f0fbbcc155aef2a1ffcb8aa593fe7a966d0e6900", "parents": [ "55f6561c6941713ab5ae9180525b026dd40b7d14" ], "author": { "name": "Arnd Bergmann", "email": "arnd@arndb.de", "time": "Wed Nov 17 16:26:55 2010 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Nov 17 08:59:32 2010 -0800" }, "message": "BKL: remove extraneous #include \u003csmp_lock.h\u003e\n\nThe big kernel lock has been removed from all these files at some point,\nleaving only the #include.\n\nRemove this too as a cleanup.\n\nSigned-off-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "23308ba54dcdb54481163bfb07dd8aeca76a7a2e", "tree": "3c96c14ee801188978dd2e2c3c84f9ed7535660e", "parents": [ "281e66057757ddf32ffe679a08f9634fa9f70a7a" ], "author": { "name": "Jiri Slaby", "email": "jslaby@suse.cz", "time": "Thu Nov 04 16:20:24 2010 +0100" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Tue Nov 16 12:50:17 2010 -0800" }, "message": "console: add /proc/consoles\n\nIt allows users to see what consoles are currently known to the system\nand with what flags.\n\nIt is based on Werner\u0027s patch, the part about traversing fds was\nremoved, the code was moved to kernel/printk.c, where consoles are\nhandled and it makes more sense to me.\n\nSigned-off-by: Jiri Slaby \u003cjslaby@suse.cz\u003e [cleanups]\nSigned-off-by: \"Dr. Werner Fink\" \u003cwerner@suse.de\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\nCc: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n" }, { "commit": "aed1d84f98738bcc1c605e1ff442de9890441315", "tree": "30fd177f50289b5daa621c0e2922b9942bdff0f5", "parents": [ "579441a39bbbbc408acd5b228d63e76cff708fe6" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Jul 26 13:12:54 2010 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Oct 29 04:17:01 2010 -0400" }, "message": "switch procfs to -\u003emount()\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "579441a39bbbbc408acd5b228d63e76cff708fe6", "tree": "01798eac955db70fd7f08d98e7563c261fec32a3", "parents": [ "d753ed975953a4e97a356bcd59ff146919f29235" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Jul 26 13:09:36 2010 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Oct 29 04:16:58 2010 -0400" }, "message": "setting -\u003eproc_mnt doesn\u0027t belong in proc_get_sb()\n\ntake that to kern_mount_data()-using callers\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "478735e38887077ac77a9756121b6ce0cb956e2f", "tree": "7b42110f71b1711f56cbbc0a01f00894b221337d", "parents": [ "f2c66cd8eeddedb440f33bc0f5cec1ed7ae376cb" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Oct 27 15:34:15 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 27 18:03:13 2010 -0700" }, "message": "/proc/stat: fix scalability of irq sum of all cpu\n\nIn /proc/stat, the number of per-IRQ event is shown by making a sum each\nirq\u0027s events on all cpus. But we can make use of kstat_irqs().\n\nkstat_irqs() do the same calculation, If !CONFIG_GENERIC_HARDIRQ,\nit\u0027s not a big cost. (Both of the number of cpus and irqs are small.)\n\nIf a system is very big and CONFIG_GENERIC_HARDIRQ, it does\n\n\tfor_each_irq()\n\t\tfor_each_cpu()\n\t\t\t- look up a radix tree\n\t\t\t- read desc-\u003eirq_stat[cpu]\nThis seems not efficient. This patch adds kstat_irqs() for\nCONFIG_GENRIC_HARDIRQ and change the calculation as\n\n\tfor_each_irq()\n\t\tlook up radix tree\n\t\tfor_each_cpu()\n\t\t\t- read desc-\u003eirq_stat[cpu]\n\nThis reduces cost.\n\nA test on (4096cpusp, 256 nodes, 4592 irqs) host (by Jack Steiner)\n\n%time cat /proc/stat \u003e /dev/null\n\nBefore Patch:\t 2.459 sec\nAfter Patch :\t .561 sec\n\n[akpm@linux-foundation.org: unexport kstat_irqs, coding-style tweaks]\n[akpm@linux-foundation.org: fix unused variable \u0027per_irq_sum\u0027]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nTested-by: Jack Steiner \u003csteiner@sgi.com\u003e\nAcked-by: Jack Steiner \u003csteiner@sgi.com\u003e\nCc: Yinghai Lu \u003cyinghai@kernel.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f2c66cd8eeddedb440f33bc0f5cec1ed7ae376cb", "tree": "4b8cfcd2a76652839121707fc2a49b70489ec055", "parents": [ "19cd56c48da58bebc3a638e036bcab69469acd27" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Oct 27 15:34:13 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 27 18:03:13 2010 -0700" }, "message": "/proc/stat: scalability of irq num per cpu\n\n/proc/stat shows the total number of all interrupts to each cpu. But when\nthe number of IRQs are very large, it take very long time and \u0027cat\n/proc/stat\u0027 takes more than 10 secs. This is because sum of all irq\nevents are counted when /proc/stat is read. This patch adds \"sum of all\nirq\" counter percpu and reduce read costs.\n\nThe cost of reading /proc/stat is important because it\u0027s used by major\napplications as \u0027top\u0027, \u0027ps\u0027, \u0027w\u0027, etc....\n\nA test on a mechin (4096cpu, 256 nodes, 4592 irqs) shows\n\n %time cat /proc/stat \u003e /dev/null\n Before Patch: 12.627 sec\n After Patch: 2.459 sec\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nTested-by: Jack Steiner \u003csteiner@sgi.com\u003e\nAcked-by: Jack Steiner \u003csteiner@sgi.com\u003e\nCc: Yinghai Lu \u003cyinghai@kernel.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "19cd56c48da58bebc3a638e036bcab69469acd27", "tree": "90b950ce033e8a297a1624be16891ef7d5c83521", "parents": [ "03f890f8c2f5c9008d3d8f6d85267717ced4bd79" ], "author": { "name": "Davidlohr Bueso", "email": "dave@gnu.org", "time": "Wed Oct 27 15:34:12 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 27 18:03:13 2010 -0700" }, "message": "procfs: fix /proc/softirqs formatting\n\nThe length of the BLOCK_IPOLL string is making i\u0027s value be printed too\nfar to the right. This patch fixes this and makes the output a bit\nneater.\n\nCurrently:\n CPU0\n HI: 0\n TIMER: 599792\n NET_TX: 2\n NET_RX: 6\n BLOCK: 80807\nBLOCK_IOPOLL: 0\n TASKLET: 20012\n SCHED: 0\n HRTIMER: 63\n RCU: 619279\n\nWith patch:\n CPU0\n HI: 0\n TIMER: 585582\n NET_TX: 2\n NET_RX: 6\n BLOCK: 80320\nBLOCK_IOPOLL: 0\n TASKLET: 19287\n SCHED: 0\n HRTIMER: 62\n RCU: 604441\n\nSigned-off-by: Davidlohr Bueso \u003cdave@gnu.org\u003e\nAcked-by: Keika Kobayashi \u003ckobayashi.kk@ncos.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": "b40d4f84becd69275451baee7f0801c85eb58437", "tree": "78258f7b431a900bf8292d25970dea74b8aa283f", "parents": [ "d16e15f5b029fc7d03540ba0e5fb23b0abb0ebe0" ], "author": { "name": "Nikanth Karthikesan", "email": "knikanth@suse.de", "time": "Wed Oct 27 15:34:10 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 27 18:03:13 2010 -0700" }, "message": "/proc/pid/smaps: export amount of anonymous memory in a mapping\n\nExport the number of anonymous pages in a mapping via smaps.\n\nEven the private pages in a mapping backed by a file, would be marked as\nanonymous, when they are modified. Export this information to user-space via\nsmaps.\n\nExporting this count will help gdb to make a better decision on which\nareas need to be dumped in its coredump; and should be useful to others\nstudying the memory usage of a process.\n\nSigned-off-by: Nikanth Karthikesan \u003cknikanth@suse.de\u003e\nAcked-by: Hugh Dickins \u003chughd@google.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9b1bf12d5d51bca178dea21b04a0805e29d60cf1", "tree": "902a2c0e5882a2152da59a589958d6426dc84643", "parents": [ "b84011508360d6885a9d95a235ec77d56f133377" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Wed Oct 27 15:34:08 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 27 18:03:12 2010 -0700" }, "message": "signals: move cred_guard_mutex from task_struct to signal_struct\n\nOleg Nesterov pointed out we have to prevent multiple-threads-inside-exec\nitself and we can reuse -\u003ecred_guard_mutex for it. Yes, concurrent\nexecve() has no worth.\n\nLet\u0027s move -\u003ecred_guard_mutex from task_struct to signal_struct. It\nnaturally prevent multiple-threads-inside-exec.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nAcked-by: David Howells \u003cdhowells@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": "426e1f5cec4821945642230218876b0e89aafab1", "tree": "2728ace018d0698886989da586210ef1543a7098", "parents": [ "9e5fca251f44832cb996961048ea977f80faf6ea", "63997e98a3be68d7cec806d22bf9b02b2e1daabb" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Oct 26 17:58:44 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Oct 26 17:58:44 2010 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (52 commits)\n split invalidate_inodes()\n fs: skip I_FREEING inodes in writeback_sb_inodes\n fs: fold invalidate_list into invalidate_inodes\n fs: do not drop inode_lock in dispose_list\n fs: inode split IO and LRU lists\n fs: switch bdev inode bdi\u0027s correctly\n fs: fix buffer invalidation in invalidate_list\n fsnotify: use dget_parent\n smbfs: use dget_parent\n exportfs: use dget_parent\n fs: use RCU read side protection in d_validate\n fs: clean up dentry lru modification\n fs: split __shrink_dcache_sb\n fs: improve DCACHE_REFERENCED usage\n fs: use percpu counter for nr_dentry and nr_dentry_unused\n fs: simplify __d_free\n fs: take dcache_lock inside __d_path\n fs: do not assign default i_ino in new_inode\n fs: introduce a per-cpu last_ino allocator\n new helper: ihold()\n ...\n" }, { "commit": "d19d5476f4b9f91d2de92b91588bb118beba6c0d", "tree": "b267c225c2b7507f7e4900676649b20e56e06ba2", "parents": [ "723548bff1dde9ab6bdb23f4bb92277c4da49473" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 26 14:21:26 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Oct 26 16:52:05 2010 -0700" }, "message": "oom: fix locking for oom_adj and oom_score_adj\n\nThe locking order in oom_adjust_write() and oom_score_adj_write() for\ntask-\u003ealloc_lock and task-\u003esighand-\u003esiglock is reversed, and lockdep\nnotices that irqs could encounter an ABBA scenario.\n\nThis fixes the locking order so that we always take task_lock(task) prior\nto lock_task_sighand(task).\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nReported-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Ying Han \u003cyinghan@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": "723548bff1dde9ab6bdb23f4bb92277c4da49473", "tree": "7c4b97cb80003caae19a849e9ffb490be943bbf2", "parents": [ "1e99bad0d9c12a4aaa60cd812c84ef152564bcf5" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 26 14:21:25 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Oct 26 16:52:05 2010 -0700" }, "message": "oom: rewrite error handling for oom_adj and oom_score_adj tunables\n\nIt\u0027s better to use proper error handling in oom_adjust_write() and\noom_score_adj_write() instead of duplicating the locking order on various\nexit paths.\n\nSuggested-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Ying Han \u003cyinghan@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": "3d5992d2ac7dc09aed8ab537cba074589f0f0a52", "tree": "0fbb51026e8aa13ddd7a6516c04471ceb97bc277", "parents": [ "0f4d208f1975f16f269134cee5f44c1f048581da" ], "author": { "name": "Ying Han", "email": "yinghan@google.com", "time": "Tue Oct 26 14:21:23 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Oct 26 16:52:05 2010 -0700" }, "message": "oom: add per-mm oom disable count\n\nIt\u0027s pointless to kill a task if another thread sharing its mm cannot be\nkilled to allow future memory freeing. A subsequent patch will prevent\nkills in such cases, but first it\u0027s necessary to have a way to flag a task\nthat shares memory with an OOM_DISABLE task that doesn\u0027t incur an\nadditional tasklist scan, which would make select_bad_process() an O(n^2)\nfunction.\n\nThis patch adds an atomic counter to struct mm_struct that follows how\nmany threads attached to it have an oom_score_adj of OOM_SCORE_ADJ_MIN.\nThey cannot be killed by the kernel, so their memory cannot be freed in\noom conditions.\n\nThis only requires task_lock() on the task that we\u0027re operating on, it\ndoes not require mm-\u003emmap_sem since task_lock() pins the mm and the\noperation is atomic.\n\n[rientjes@google.com: changelog and sys_unshare() code]\n[rientjes@google.com: protect oom_disable_count with task_lock in fork]\n[rientjes@google.com: use old_mm for oom_disable_count in exec]\nSigned-off-by: Ying Han \u003cyinghan@google.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@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": "a4f7326da2bfe788b85509ec0c261e64596cdde4", "tree": "da9e0899ec860a36f1a6f9196be7eb59c31cb9e3", "parents": [ "dbec921370ea049eccd38e34e067373fb3bd9b01" ], "author": { "name": "WANG Cong", "email": "xiyou.wangcong@gmail.com", "time": "Tue Oct 26 14:21:21 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Oct 26 16:52:05 2010 -0700" }, "message": "vmcore: it is not experimental any more\n\nWe use vmcore in our production kernel for a long time, it is pretty\nstable now. So I don\u0027t think we need to mark it as experimental any more.\n\nSigned-off-by: WANG Cong \u003cxiyou.wangcong@gmail.com\u003e\nAcked-by: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "85fe4025c616a7c0ed07bc2fc8c5371b07f3888c", "tree": "7a5db7accb6192f2911f2473b4e3191227b914cc", "parents": [ "f991bd2e14210fb93d722cb23e54991de20e8a3d" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Sat Oct 23 11:19:54 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Oct 25 21:26:11 2010 -0400" }, "message": "fs: do not assign default i_ino in new_inode\n\nInstead of always assigning an increasing inode number in new_inode\nmove the call to assign it into those callers that actually need it.\nFor now callers that need it is estimated conservatively, that is\nthe call is added to all filesystems that do not assign an i_ino\nby themselves. For a few more filesystems we can avoid assigning\nany inode number given that they aren\u0027t user visible, and for others\nit could be done lazily when an inode number is actually needed,\nbut that\u0027s left for later patches.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "4a3956c790290efeb647bbb0c3a90476bb57800e", "tree": "18abb41325273d23ae271e49627f01054c5baeb6", "parents": [ "ba10f486658c0ca1bc84c936f6a996e40d071453" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Fri Oct 01 14:20:22 2010 -0700" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Oct 25 21:18:21 2010 -0400" }, "message": "vfs: introduce FMODE_UNSIGNED_OFFSET for allowing negative f_pos\n\nNow, rw_verify_area() checsk f_pos is negative or not. And if negative,\nreturns -EINVAL.\n\nBut, some special files as /dev/(k)mem and /proc/\u003cpid\u003e/mem etc.. has\nnegative offsets. And we can\u0027t do any access via read/write to the\nfile(device).\n\nSo introduce FMODE_UNSIGNED_OFFSET to allow negative file offsets.\n\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "6c2754c28f2388a276fe21edde826f2113c8f60e", "tree": "cfb966a1bbe36f10a7f55d0e38d34dfb275b9992", "parents": [ "ab34c02afeafd047a831e6fe2a4dd875ce86bee0" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Oct 23 08:14:12 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Oct 23 08:14:12 2010 -0700" }, "message": "Revert \"tty: Add a new file /proc/tty/consoles\"\n\nThis reverts commit f4a3e0bceb57466c31757f25e4e0ed108d1299ec. Jiri\nSladby points out that the tty structure we\u0027re using may already be\ngone, and Al Viro doesn\u0027t hold back in complaining about the random\nloading of \u0027filp-\u003eprivate_data\u0027 which doesn\u0027t have to be a pointer at\nall, nor does checking the magic field for TTY_MAGIC prove anything.\n\nBelated review by Al:\n\n \"a) global variable depending on stdin of the last opener? Affecting\n output of read(2)? Really?\n\n b) iterator is broken; list should be locked in -\u003estart(), unlocked in\n -\u003estop() and *NOT* unlocked/relocked in -\u003enext()\n\n c) -\u003eshow() ought to do nothing in case of -\u003edevice \u003d\u003d NULL, instead\n of skipping those in -\u003enext()/-\u003estart()\n\n d) regardless of the merits of the bright idea about asterisk at that\n line in output *and* regardless of (a), the implementation is not\n only atrociously ugly, it\u0027s actually very likely to be a roothole.\n Verifying that Cthulhu knows what number happens to be address of a\n tty_struct by blindly dereferencing memory at that address...\n Ouch.\n\n Please revert that crap.\"\n\nAnd Christoph pipes in and NAK\u0027s the approach of walking fd tables etc\ntoo. So it\u0027s pretty unanimous.\n\nNoticed-by: Jri Slaby \u003cjslaby@suse.cz\u003e\nRequested-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\nCc: Werner Fink \u003cwerner@suse.de\u003e\nCc: Alan Cox \u003calan@lxorguk.ukuu.org.uk\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "73ecf3a6e3f0206bf56a0fefe3b3eda042fb7034", "tree": "866f0ebb2b148479e93b5ac955097b1cc94ceb4e", "parents": [ "b9da0571050c09863e59f94d0b8594a290d61b88", "cd3ecad19aea8debae9a48b53de2ec7a571f24e9" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Oct 22 19:59:04 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Oct 22 19:59:04 2010 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (49 commits)\n serial8250: ratelimit \"too much work\" error\n serial: bfin_sport_uart: speed up sport RX sample rate to be 3% faster\n serial: abstraction for 8250 legacy ports\n serial/imx: check that the buffer is non-empty before sending it out\n serial: mfd: add more baud rates support\n jsm: Remove the uart port on errors\n Alchemy: Add UART PM methods.\n 8250: allow platforms to override PM hook.\n altera_uart: Don\u0027t use plain integer as NULL pointer\n altera_uart: Fix missing prototype for registering an early console\n altera_uart: Fixup type usage of port flags\n altera_uart: Make it possible to use Altera UART and 8250 ports together\n altera_uart: Add support for different address strides\n altera_uart: Add support for getting mapbase and IRQ from resources\n altera_uart: Add support for polling mode (IRQ-less)\n serial: Factor out uart_poll_timeout() from 8250 driver\n serial: mark the 8250 driver as maintained\n serial: 8250: Don\u0027t delay after transmitter is ready.\n tty: MAINTAINERS: add drivers/serial/jsm/ as maintained driver\n vcs: invoke the vt update callback when /dev/vcs* is written to\n ...\n" }, { "commit": "092e0e7e520a1fca03e13c9f2d157432a8657ff2", "tree": "451897252c4c08c4b5a8ef535da156f1e817e80b", "parents": [ "79f14b7c56d3b3ba58f8b43d1f70b9b71477a800", "776c163b1b93c8dfa5edba885bc2bfbc2d228a5f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Oct 22 10:52:56 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Oct 22 10:52:56 2010 -0700" }, "message": "Merge branch \u0027llseek\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl\n\n* \u0027llseek\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl:\n vfs: make no_llseek the default\n vfs: don\u0027t use BKL in default_llseek\n llseek: automatically add .llseek fop\n libfs: use generic_file_llseek for simple_attr\n mac80211: disallow seeks in minstrel debug code\n lirc: make chardev nonseekable\n viotape: use noop_llseek\n raw: use explicit llseek file operations\n ibmasmfs: use generic_file_llseek\n spufs: use llseek in all file operations\n arm/omap: use generic_file_llseek in iommu_debug\n lkdtm: use generic_file_llseek in debugfs\n net/wireless: use generic_file_llseek in debugfs\n drm: use noop_llseek\n" }, { "commit": "f4a3e0bceb57466c31757f25e4e0ed108d1299ec", "tree": "c08eda0100e97ebd1fe4ab90b5d8eb142e505673", "parents": [ "a9e2e06015201c32c43d3615c9bf5e0d4efb4302" ], "author": { "name": "Dr. Werner Fink", "email": "werner@suse.de", "time": "Wed Sep 22 12:45:40 2010 +0200" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Fri Oct 22 10:20:05 2010 -0700" }, "message": "tty: Add a new file /proc/tty/consoles\n\nAdd a new file /proc/tty/consoles to be able to determine the registered\nsystem console lines. If the reading process holds /dev/console open at\nthe regular standard input stream the active device will be marked by an\nasterisk. Show possible operations and also decode the used flags of\nthe listed console lines.\n\nSigned-off-by: Werner Fink \u003cwerner@suse.de\u003e\nCc: Alan Cox \u003calan@lxorguk.ukuu.org.uk\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n\n" }, { "commit": "6038f373a3dc1f1c26496e60b6c40b164716f07e", "tree": "a0d3bbd026eea41b9fc36b8c722cbaf56cd9f825", "parents": [ "1ec5584e3edf9c4bf2c88c846534d19cf986ba11" ], "author": { "name": "Arnd Bergmann", "email": "arnd@arndb.de", "time": "Sun Aug 15 18:52:59 2010 +0200" }, "committer": { "name": "Arnd Bergmann", "email": "arnd@arndb.de", "time": "Fri Oct 15 15:53:27 2010 +0200" }, "message": "llseek: automatically add .llseek fop\n\nAll file_operations should get a .llseek operation so we can make\nnonseekable_open the default for future file operations without a\n.llseek pointer.\n\nThe three cases that we can automatically detect are no_llseek, seq_lseek\nand default_llseek. For cases where we can we can automatically prove that\nthe file offset is always ignored, we use noop_llseek, which maintains\nthe current behavior of not returning an error from a seek.\n\nNew drivers should normally not use noop_llseek but instead use no_llseek\nand call nonseekable_open at open time. Existing drivers can be converted\nto do the same when the maintainer knows for certain that no user code\nrelies on calling seek on the device file.\n\nThe generated code is often incorrectly indented and right now contains\ncomments that clarify for each added line why a specific variant was\nchosen. In the version that gets submitted upstream, the comments will\nbe gone and I will manually fix the indentation, because there does not\nseem to be a way to do that using coccinelle.\n\nSome amount of new code is currently sitting in linux-next that should get\nthe same modifications, which I will do at the end of the merge window.\n\nMany thanks to Julia Lawall for helping me learn to write a semantic\npatch that does all this.\n\n\u003d\u003d\u003d\u003d\u003d begin semantic patch \u003d\u003d\u003d\u003d\u003d\n// This adds an llseek\u003d method to all file operations,\n// as a preparation for making no_llseek the default.\n//\n// The rules are\n// - use no_llseek explicitly if we do nonseekable_open\n// - use seq_lseek for sequential files\n// - use default_llseek if we know we access f_pos\n// - use noop_llseek if we know we don\u0027t access f_pos,\n// but we still want to allow users to call lseek\n//\n@ open1 exists @\nidentifier nested_open;\n@@\nnested_open(...)\n{\n\u003c+...\nnonseekable_open(...)\n...+\u003e\n}\n\n@ open exists@\nidentifier open_f;\nidentifier i, f;\nidentifier open1.nested_open;\n@@\nint open_f(struct inode *i, struct file *f)\n{\n\u003c+...\n(\nnonseekable_open(...)\n|\nnested_open(...)\n)\n...+\u003e\n}\n\n@ read disable optional_qualifier exists @\nidentifier read_f;\nidentifier f, p, s, off;\ntype ssize_t, size_t, loff_t;\nexpression E;\nidentifier func;\n@@\nssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)\n{\n\u003c+...\n(\n *off \u003d E\n|\n *off +\u003d E\n|\n func(..., off, ...)\n|\n E \u003d *off\n)\n...+\u003e\n}\n\n@ read_no_fpos disable optional_qualifier exists @\nidentifier read_f;\nidentifier f, p, s, off;\ntype ssize_t, size_t, loff_t;\n@@\nssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)\n{\n... when !\u003d off\n}\n\n@ write @\nidentifier write_f;\nidentifier f, p, s, off;\ntype ssize_t, size_t, loff_t;\nexpression E;\nidentifier func;\n@@\nssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)\n{\n\u003c+...\n(\n *off \u003d E\n|\n *off +\u003d E\n|\n func(..., off, ...)\n|\n E \u003d *off\n)\n...+\u003e\n}\n\n@ write_no_fpos @\nidentifier write_f;\nidentifier f, p, s, off;\ntype ssize_t, size_t, loff_t;\n@@\nssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)\n{\n... when !\u003d off\n}\n\n@ fops0 @\nidentifier fops;\n@@\nstruct file_operations fops \u003d {\n ...\n};\n\n@ has_llseek depends on fops0 @\nidentifier fops0.fops;\nidentifier llseek_f;\n@@\nstruct file_operations fops \u003d {\n...\n .llseek \u003d llseek_f,\n...\n};\n\n@ has_read depends on fops0 @\nidentifier fops0.fops;\nidentifier read_f;\n@@\nstruct file_operations fops \u003d {\n...\n .read \u003d read_f,\n...\n};\n\n@ has_write depends on fops0 @\nidentifier fops0.fops;\nidentifier write_f;\n@@\nstruct file_operations fops \u003d {\n...\n .write \u003d write_f,\n...\n};\n\n@ has_open depends on fops0 @\nidentifier fops0.fops;\nidentifier open_f;\n@@\nstruct file_operations fops \u003d {\n...\n .open \u003d open_f,\n...\n};\n\n// use no_llseek if we call nonseekable_open\n////////////////////////////////////////////\n@ nonseekable1 depends on !has_llseek \u0026\u0026 has_open @\nidentifier fops0.fops;\nidentifier nso ~\u003d \"nonseekable_open\";\n@@\nstruct file_operations fops \u003d {\n... .open \u003d nso, ...\n+.llseek \u003d no_llseek, /* nonseekable */\n};\n\n@ nonseekable2 depends on !has_llseek @\nidentifier fops0.fops;\nidentifier open.open_f;\n@@\nstruct file_operations fops \u003d {\n... .open \u003d open_f, ...\n+.llseek \u003d no_llseek, /* open uses nonseekable */\n};\n\n// use seq_lseek for sequential files\n/////////////////////////////////////\n@ seq depends on !has_llseek @\nidentifier fops0.fops;\nidentifier sr ~\u003d \"seq_read\";\n@@\nstruct file_operations fops \u003d {\n... .read \u003d sr, ...\n+.llseek \u003d seq_lseek, /* we have seq_read */\n};\n\n// use default_llseek if there is a readdir\n///////////////////////////////////////////\n@ fops1 depends on !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier readdir_e;\n@@\n// any other fop is used that changes pos\nstruct file_operations fops \u003d {\n... .readdir \u003d readdir_e, ...\n+.llseek \u003d default_llseek, /* readdir is present */\n};\n\n// use default_llseek if at least one of read/write touches f_pos\n/////////////////////////////////////////////////////////////////\n@ fops2 depends on !fops1 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier read.read_f;\n@@\n// read fops use offset\nstruct file_operations fops \u003d {\n... .read \u003d read_f, ...\n+.llseek \u003d default_llseek, /* read accesses f_pos */\n};\n\n@ fops3 depends on !fops1 \u0026\u0026 !fops2 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier write.write_f;\n@@\n// write fops use offset\nstruct file_operations fops \u003d {\n... .write \u003d write_f, ...\n+\t.llseek \u003d default_llseek, /* write accesses f_pos */\n};\n\n// Use noop_llseek if neither read nor write accesses f_pos\n///////////////////////////////////////////////////////////\n\n@ fops4 depends on !fops1 \u0026\u0026 !fops2 \u0026\u0026 !fops3 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier read_no_fpos.read_f;\nidentifier write_no_fpos.write_f;\n@@\n// write fops use offset\nstruct file_operations fops \u003d {\n...\n .write \u003d write_f,\n .read \u003d read_f,\n...\n+.llseek \u003d noop_llseek, /* read and write both use no f_pos */\n};\n\n@ depends on has_write \u0026\u0026 !has_read \u0026\u0026 !fops1 \u0026\u0026 !fops2 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier write_no_fpos.write_f;\n@@\nstruct file_operations fops \u003d {\n... .write \u003d write_f, ...\n+.llseek \u003d noop_llseek, /* write uses no f_pos */\n};\n\n@ depends on has_read \u0026\u0026 !has_write \u0026\u0026 !fops1 \u0026\u0026 !fops2 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier read_no_fpos.read_f;\n@@\nstruct file_operations fops \u003d {\n... .read \u003d read_f, ...\n+.llseek \u003d noop_llseek, /* read uses no f_pos */\n};\n\n@ depends on !has_read \u0026\u0026 !has_write \u0026\u0026 !fops1 \u0026\u0026 !fops2 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\n@@\nstruct file_operations fops \u003d {\n...\n+.llseek \u003d noop_llseek, /* no read or write fn */\n};\n\u003d\u003d\u003d\u003d\u003d End semantic patch \u003d\u003d\u003d\u003d\u003d\n\nSigned-off-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Julia Lawall \u003cjulia@diku.dk\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\n" }, { "commit": "3036e7b490bf7878c6dae952eec5fb87b1106589", "tree": "559270d71bd6e920bc39a8af360b54fb5753984d", "parents": [ "f015ac3edd84ad72f88e08a4d83c56c360aae404" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Sep 30 15:15:33 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Oct 01 10:50:59 2010 -0700" }, "message": "proc: make /proc/pid/limits world readable\n\nHaving the limits file world readable will ease the task of system\nmanagement on systems where root privileges might be restricted.\n\nHaving admin restricted with root priviledges, he/she could not check\nother users process\u0027 limits.\n\nAlso it\u0027d align with most of the /proc stat files.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nAcked-by: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nCc: Eugene Teo \u003ceugene@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": "1c2499ae87f828eabddf6483b0dfc11da1100c07", "tree": "be394bdb6d8bd1732a2635eca62e5b2eca04c07a", "parents": [ "142092e577255e33a4ab74c6baad04c9fb887927" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Wed Sep 22 13:05:06 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Sep 22 17:22:39 2010 -0700" }, "message": "/proc/pid/smaps: fix dirty pages accounting\n\nCurrently, /proc/\u003cpid\u003e/smaps has wrong dirty pages accounting.\nShared_Dirty and Private_Dirty output only pte dirty pages and ignore\nPG_dirty page flag. It is difference against documentation, but also\ninconsistent against Referenced field. (Referenced checks both pte and\npage flags)\n\nThis patch fixes it.\n\nTest program:\n\n large-array.c\n ---------------------------------------------------\n #include \u003cstdio.h\u003e\n #include \u003cstdlib.h\u003e\n #include \u003cstring.h\u003e\n #include \u003cunistd.h\u003e\n\n char array[1*1024*1024*1024L];\n\n int main(void)\n {\n memset(array, 1, sizeof(array));\n pause();\n\n return 0;\n }\n ---------------------------------------------------\n\nTest case:\n 1. run ./large-array\n 2. cat /proc/`pidof large-array`/smaps\n 3. swapoff -a\n 4. cat /proc/`pidof large-array`/smaps again\n\nTest result:\n \u003cbefore patch\u003e\n\n00601000-40601000 rw-p 00000000 00:00 0\nSize: 1048576 kB\nRss: 1048576 kB\nPss: 1048576 kB\nShared_Clean: 0 kB\nShared_Dirty: 0 kB\nPrivate_Clean: 218992 kB \u003c-- showed pages as clean incorrectly\nPrivate_Dirty: 829584 kB\nReferenced: 388364 kB\nSwap: 0 kB\nKernelPageSize: 4 kB\nMMUPageSize: 4 kB\n\n \u003cafter patch\u003e\n\n00601000-40601000 rw-p 00000000 00:00 0\nSize: 1048576 kB\nRss: 1048576 kB\nPss: 1048576 kB\nShared_Clean: 0 kB\nShared_Dirty: 0 kB\nPrivate_Clean: 0 kB\nPrivate_Dirty: 1048576 kB \u003c-- fixed\nReferenced: 388480 kB\nSwap: 0 kB\nKernelPageSize: 4 kB\nMMUPageSize: 4 kB\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Hugh Dickins \u003chughd@google.com\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c227e69028473c7c7994a9b0a2cc0034f3f7e0fe", "tree": "e11e51f5eec4c2c82a8ef7839de74407f470176c", "parents": [ "a9e31765e7d528858e1b0c202b823cf4df7577ca" ], "author": { "name": "Arnd Bergmann", "email": "arnd@arndb.de", "time": "Wed Sep 22 13:04:54 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Sep 22 17:22:38 2010 -0700" }, "message": "/proc/vmcore: fix seeking\n\nCommit 73296bc611 (\"procfs: Use generic_file_llseek in /proc/vmcore\")\nbroke seeking on /proc/vmcore. This changes it back to use default_llseek\nin order to restore the original behaviour.\n\nThe problem with generic_file_llseek is that it only allows seeks up to\ninode-\u003ei_sb-\u003es_maxbytes, which is zero on procfs and some other virtual\nfile systems. We should merge generic_file_llseek and default_llseek some\nday and clean this up in a proper way, but for 2.6.35/36, reverting vmcore\nis the safer solution.\n\nSigned-off-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nReported-by: CAI Qian \u003ccaiqian@redhat.com\u003e\nTested-by: CAI Qian \u003ccaiqian@redhat.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": "ed430fec756ad65f7cfba24f8ad17c3d5a403290", "tree": "b0846b50b99ea2ec1e409bebb5ee13e18324dc8e", "parents": [ "85a0fdfd0f967507f3903e8419bc7e408f5a59de" ], "author": { "name": "Takashi Iwai", "email": "tiwai@suse.de", "time": "Thu Sep 09 16:37:36 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 09 18:57:23 2010 -0700" }, "message": "proc: export uncached bit properly in /proc/kpageflags\n\nFix the left-over old ifdef for PG_uncached in /proc/kpageflags. Now it\u0027s\nused by x86, too.\n\nSigned-off-by: Takashi Iwai \u003ctiwai@suse.de\u003e\nCc: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "39aa3cb3e8250db9188a6f1e3fb62ffa1a717678", "tree": "266640c10436e9bda9bc283fbe5db22761a7cc7c", "parents": [ "26a94e81ded0fcdc0bf96b5fea7343311f1a220b" ], "author": { "name": "Stefan Bader", "email": "stefan.bader@canonical.com", "time": "Tue Aug 31 15:52:27 2010 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 09 09:05:06 2010 -0700" }, "message": "mm: Move vma_stack_continue into mm.h\n\nSo it can be used by all that need to check for that.\n\nSigned-off-by: Stefan Bader \u003cstefan.bader@canonical.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d7824370e26325c881b665350ce64fb0a4fde24a", "tree": "c3fb9ceb074d52c3edd166a927314c642f2fe631", "parents": [ "1b68c9596ce17a1e06918ed65fc3d19b92b04aab" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Aug 15 11:35:52 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Aug 15 11:35:52 2010 -0700" }, "message": "mm: fix up some user-visible effects of the stack guard page\n\nThis commit makes the stack guard page somewhat less visible to user\nspace. It does this by:\n\n - not showing the guard page in /proc/\u003cpid\u003e/maps\n\n It looks like lvm-tools will actually read /proc/self/maps to figure\n out where all its mappings are, and effectively do a specialized\n \"mlockall()\" in user space. By not showing the guard page as part of\n the mapping (by just adding PAGE_SIZE to the start for grows-up\n pages), lvm-tools ends up not being aware of it.\n\n - by also teaching the _real_ mlock() functionality not to try to lock\n the guard page.\n\n That would just expand the mapping down to create a new guard page,\n so there really is no point in trying to lock it in place.\n\nIt would perhaps be nice to show the guard page specially in\n/proc/\u003cpid\u003e/maps (or at least mark grow-down segments some way), but\nlet\u0027s not open ourselves up to more breakage by user space from programs\nthat depends on the exact deails of the \u0027maps\u0027 file.\n\nSpecial thanks to Henrique de Moraes Holschuh for diving into lvm-tools\nsource code to see what was going on with the whole new warning.\n\nReported-and-tested-by: François Valenduc \u003cfrancois.valenduc@tvcablenet.be\nReported-by: Henrique de Moraes Holschuh \u003chmh@hmh.eng.br\u003e\nCc: stable@kernel.org\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b19dd42faf413b4705d4adb38521e82d73fa4249", "tree": "fbfdea065c3772b2de2c37238af6afcad2e42934", "parents": [ "c6d7ba8b12636923f3e30997dec69bed58e176b6" ], "author": { "name": "Arnd Bergmann", "email": "arnd@arndb.de", "time": "Sun Jul 04 00:15:10 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sat Aug 14 00:24:24 2010 +0200" }, "message": "bkl: Remove locked .ioctl file operation\n\nThe last user is gone, so we can safely remove this\n\nSigned-off-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: John Kacur \u003cjkacur@redhat.com\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\n" }, { "commit": "5af568cbd55f60b5a1d174f621b273e4f585dc35", "tree": "7cdc1afeb267519133a29ac595df21278c556c8c", "parents": [ "062e27ec1b49d12bdb1ecc94d74b5fee5a5775db", "66a362a2aa8ffa72670259fa15e2a77a01cc2217" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Aug 11 09:23:32 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Aug 11 09:23:32 2010 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:\n isofs: Fix lseek() to position beyond 4 GB\n vfs: remove unused MNT_STRICTATIME\n vfs: show unreachable paths in getcwd and proc\n vfs: only add \" (deleted)\" where necessary\n vfs: add prepend_path() helper\n vfs: __d_path: dont prepend the name of the root dentry\n ia64: perfmon: add d_dname method\n vfs: add helpers to get root and pwd\n cachefiles: use path_get instead of lone dget\n fs/sysv/super.c: add support for non-PDP11 v7 filesystems\n V7: Adjust sanity checks for some volumes\n Add v7 alias\n v9fs: fixup for inode_setattr being removed\n\nManual merge to take Al\u0027s version of the fs/sysv/super.c file: it merged\ncleanly, but Al had removed an unnecessary header include, so his side\nwas better.\n" }, { "commit": "cfbef3cb16658046c6faa8c9816018dd11ae62f0", "tree": "e3c548806eda5f695bedea312660222b7384d53f", "parents": [ "a2a20c412c86e0bb46a9ab0dd31bcfe6d201b913" ], "author": { "name": "Robert P. J. Day", "email": "rpjday@crashcourse.ca", "time": "Tue Aug 10 18:03:08 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Aug 11 08:59:20 2010 -0700" }, "message": "procfs: simplify conditional processing of fs/proc.o.\n\nSince the entire fs/proc directory is conditionally included based on\nCONFIG_PROC_FS, it\u0027s redundant to check that same variable within that\ndirectory.\n\nSigned-off-by: Robert P. J. Day \u003crpjday@crashcourse.ca\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8df9d1a4142311c084ffeeacb67cd34d190eff74", "tree": "512e018114ea506659fac73d838bfca0fb97a5a4", "parents": [ "ffd1f4ed5bddccf2277e3d8525bcedf1983319f8" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Tue Aug 10 11:41:41 2010 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Aug 11 00:29:47 2010 -0400" }, "message": "vfs: show unreachable paths in getcwd and proc\n\nPrepend \"(unreachable)\" to path strings if the path is not reachable\nfrom the current root.\n\nTwo places updated are\n - the return string from getcwd()\n - and symlinks under /proc/$PID.\n\nOther uses of d_path() are left unchanged (we know that some old\nsoftware crashes if /proc/mounts is changed).\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "f7ad3c6be90809b53b7f0ae9d4eaa45ce2564a79", "tree": "dc9b09188bab35320200f318b5e7b52f24dc43ad", "parents": [ "542ce7a9bc6b3838832ae0f4f8de30c667af8ff3" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Tue Aug 10 11:41:36 2010 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Aug 11 00:28:20 2010 -0400" }, "message": "vfs: add helpers to get root and pwd\n\nAdd three helpers that retrieve a refcounted copy of the root and cwd\nfrom the supplied fs_struct.\n\n get_fs_root()\n get_fs_pwd()\n get_fs_root_and_pwd()\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "5f248c9c251c60af3403902b26e08de43964ea0b", "tree": "6d3328e72a7e4015a64017eb30be18095c6a3c64", "parents": [ "f6cec0ae58c17522a7bc4e2f39dae19f199ab534", "dca332528bc69e05f67161e1ed59929633d5e63d" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Aug 10 11:26:52 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Aug 10 11:26:52 2010 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (96 commits)\n no need for list_for_each_entry_safe()/resetting with superblock list\n Fix sget() race with failing mount\n vfs: don\u0027t hold s_umount over close_bdev_exclusive() call\n sysv: do not mark superblock dirty on remount\n sysv: do not mark superblock dirty on mount\n btrfs: remove junk sb_dirt change\n BFS: clean up the superblock usage\n AFFS: wait for sb synchronization when needed\n AFFS: clean up dirty flag usage\n cifs: truncate fallout\n mbcache: fix shrinker function return value\n mbcache: Remove unused features\n add f_flags to struct statfs(64)\n pass a struct path to vfs_statfs\n update VFS documentation for method changes.\n All filesystems that need invalidate_inode_buffers() are doing that explicitly\n convert remaining -\u003eclear_inode() to -\u003eevict_inode()\n Make -\u003edrop_inode() just return whether inode needs to be dropped\n fs/inode.c:clear_inode() is gone\n fs/inode.c:evict() doesn\u0027t care about delete vs. non-delete paths now\n ...\n\nFix up trivial conflicts in fs/nilfs2/super.c\n" }, { "commit": "51b1bd2ace1595b72956224deda349efa880b693", "tree": "82732bb33d26379c05494dcdba8ea390ae0621db", "parents": [ "a63d83f427fbce97a6cea0db2e64b0eb8435cd10" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:19:47 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:02 2010 -0700" }, "message": "oom: deprecate oom_adj tunable\n\n/proc/pid/oom_adj is now deprecated so that that it may eventually be\nremoved. The target date for removal is August 2012.\n\nA warning will be printed to the kernel log if a task attempts to use this\ninterface. Future warning will be suppressed until the kernel is rebooted\nto prevent spamming the kernel log.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.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": "a63d83f427fbce97a6cea0db2e64b0eb8435cd10", "tree": "8ac229cdf6e2289d97e82e35774057106fe7f4a2", "parents": [ "74bcbf40546bb7500f2a7ba4ff3cc056a6bd004a" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Aug 09 17:19:46 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:02 2010 -0700" }, "message": "oom: badness heuristic rewrite\n\nThis a complete rewrite of the oom killer\u0027s badness() heuristic which is\nused to determine which task to kill in oom conditions. The goal is to\nmake it as simple and predictable as possible so the results are better\nunderstood and we end up killing the task which will lead to the most\nmemory freeing while still respecting the fine-tuning from userspace.\n\nInstead of basing the heuristic on mm-\u003etotal_vm for each task, the task\u0027s\nrss and swap space is used instead. This is a better indication of the\namount of memory that will be freeable if the oom killed task is chosen\nand subsequently exits. This helps specifically in cases where KDE or\nGNOME is chosen for oom kill on desktop systems instead of a memory\nhogging task.\n\nThe baseline for the heuristic is a proportion of memory that each task is\ncurrently using in memory plus swap compared to the amount of \"allowable\"\nmemory. \"Allowable,\" in this sense, means the system-wide resources for\nunconstrained oom conditions, the set of mempolicy nodes, the mems\nattached to current\u0027s cpuset, or a memory controller\u0027s limit. The\nproportion is given on a scale of 0 (never kill) to 1000 (always kill),\nroughly meaning that if a task has a badness() score of 500 that the task\nconsumes approximately 50% of allowable memory resident in RAM or in swap\nspace.\n\nThe proportion is always relative to the amount of \"allowable\" memory and\nnot the total amount of RAM systemwide so that mempolicies and cpusets may\noperate in isolation; they shall not need to know the true size of the\nmachine on which they are running if they are bound to a specific set of\nnodes or mems, respectively.\n\nRoot tasks are given 3% extra memory just like __vm_enough_memory()\nprovides in LSMs. In the event of two tasks consuming similar amounts of\nmemory, it is generally better to save root\u0027s task.\n\nBecause of the change in the badness() heuristic\u0027s baseline, it is also\nnecessary to introduce a new user interface to tune it. It\u0027s not possible\nto redefine the meaning of /proc/pid/oom_adj with a new scale since the\nABI cannot be changed for backward compatability. Instead, a new tunable,\n/proc/pid/oom_score_adj, is added that ranges from -1000 to +1000. It may\nbe used to polarize the heuristic such that certain tasks are never\nconsidered for oom kill while others may always be considered. The value\nis added directly into the badness() score so a value of -500, for\nexample, means to discount 50% of its memory consumption in comparison to\nother tasks either on the system, bound to the mempolicy, in the cpuset,\nor sharing the same memory controller.\n\n/proc/pid/oom_adj is changed so that its meaning is rescaled into the\nunits used by /proc/pid/oom_score_adj, and vice versa. Changing one of\nthese per-task tunables will rescale the value of the other to an\nequivalent meaning. Although /proc/pid/oom_adj was originally defined as\na bitshift on the badness score, it now shares the same linear growth as\n/proc/pid/oom_score_adj but with different granularity. This is required\nso the ABI is not broken with userspace applications and allows oom_adj to\nbe deprecated for future removal.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.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": "74bcbf40546bb7500f2a7ba4ff3cc056a6bd004a", "tree": "39411d83f448da818368043af9b52e9b405a2002", "parents": [ "cef1d3523d33ebc35fc29e454b1f4bab953fabbf" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Mon Aug 09 17:19:43 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:02 2010 -0700" }, "message": "oom: move badness() declaration into oom.h\n\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.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": "26ebc984913b6a8d86d724b3a79d2ed4ed574612", "tree": "9d293c6f8b1bc5120beaa173590dcd83cd0e2eb0", "parents": [ "f88ccad5886d5a864b8b0d48c666ee9998dec53f" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Aug 09 17:19:37 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 09 20:45:01 2010 -0700" }, "message": "oom: /proc/\u003cpid\u003e/oom_score treat kernel thread honestly\n\nIf a kernel thread is using use_mm(), badness() returns a positive value.\nThis is not a big issue because caller take care of it correctly. But\nthere is one exception, /proc/\u003cpid\u003e/oom_score calls badness() directly and\ndoesn\u0027t care that the task is a regular process.\n\nAnother example, /proc/1/oom_score return !0 value. But it\u0027s unkillable.\nThis incorrectness makes administration a little confusing.\n\nThis patch fixes it.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.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": "8267952b362b67a5cb5371d6894a772a13e6874c", "tree": "cf0c861de2a76d1132ccc1d235dd436cdfb2f518", "parents": [ "77b8a75f5bb461951148a7211ef30eecac5cb662" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Jun 04 22:17:56 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Aug 09 16:47:52 2010 -0400" }, "message": "switch procfs to -\u003eevict_inode()\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "1025774ce411f2bd4b059ad7b53f0003569b74fa", "tree": "2be221c205cb5579652a6063e8ee27d1c72d1bbd", "parents": [ "eef2380c187890816b73b1a4cb89a09203759469" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Fri Jun 04 11:30:02 2010 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Aug 09 16:47:37 2010 -0400" }, "message": "remove inode_setattr\n\nReplace inode_setattr with opencoded variants of it in all callers. This\nmoves the remaining call to vmtruncate into the filesystem methods where it\ncan be replaced with the proper truncate sequence.\n\nIn a few cases it was obvious that we would never end up calling vmtruncate\nso it was left out in the opencoded variant:\n\n spufs: explicitly checks for ATTR_SIZE earlier\n btrfs,hugetlbfs,logfs,dlmfs: explicitly clears ATTR_SIZE earlier\n ufs: contains an opencoded simple_seattr + truncate that sets the filesize just above\n\nIn addition to that ncpfs called inode_setattr with handcrafted iattrs,\nwhich allowed to trim down the opencoded variant.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "de09a9771a5346029f4d11e4ac886be7f9bfdd75", "tree": "ccce9e75753c98a9f38075d54ab98aa4b89e66c7", "parents": [ "540ad6b62b3a188a53b51cac81d8a60d40e29fbd" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Thu Jul 29 12:45:49 2010 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 29 15:16:17 2010 -0700" }, "message": "CRED: Fix get_task_cred() and task_state() to not resurrect dead credentials\n\nIt\u0027s possible for get_task_cred() as it currently stands to \u0027corrupt\u0027 a set of\ncredentials by incrementing their usage count after their replacement by the\ntask being accessed.\n\nWhat happens is that get_task_cred() can race with commit_creds():\n\n\tTASK_1\t\t\tTASK_2\t\t\tRCU_CLEANER\n\t--\u003eget_task_cred(TASK_2)\n\trcu_read_lock()\n\t__cred \u003d __task_cred(TASK_2)\n\t\t\t\t--\u003ecommit_creds()\n\t\t\t\told_cred \u003d TASK_2-\u003ereal_cred\n\t\t\t\tTASK_2-\u003ereal_cred \u003d ...\n\t\t\t\tput_cred(old_cred)\n\t\t\t\t call_rcu(old_cred)\n\t\t[__cred-\u003eusage \u003d\u003d 0]\n\tget_cred(__cred)\n\t\t[__cred-\u003eusage \u003d\u003d 1]\n\trcu_read_unlock()\n\t\t\t\t\t\t\t--\u003eput_cred_rcu()\n\t\t\t\t\t\t\t[__cred-\u003eusage \u003d\u003d 1]\n\t\t\t\t\t\t\tpanic()\n\nHowever, since a tasks credentials are generally not changed very often, we can\nreasonably make use of a loop involving reading the creds pointer and using\natomic_inc_not_zero() to attempt to increment it if it hasn\u0027t already hit zero.\n\nIf successful, we can safely return the credentials in the knowledge that, even\nif the task we\u0027re accessing has released them, they haven\u0027t gone to the RCU\ncleanup code.\n\nWe then change task_state() in procfs to use get_task_cred() rather than\ncalling get_cred() on the result of __task_cred(), as that suffers from the\nsame problem.\n\nWithout this change, a BUG_ON in __put_cred() or in put_cred_rcu() can be\ntripped when it is noticed that the usage count is not zero as it ought to be,\nfor example:\n\nkernel BUG at kernel/cred.c:168!\ninvalid opcode: 0000 [#1] SMP\nlast sysfs file: /sys/kernel/mm/ksm/run\nCPU 0\nPid: 2436, comm: master Not tainted 2.6.33.3-85.fc13.x86_64 #1 0HR330/OptiPlex\n745\nRIP: 0010:[\u003cffffffff81069881\u003e] [\u003cffffffff81069881\u003e] __put_cred+0xc/0x45\nRSP: 0018:ffff88019e7e9eb8 EFLAGS: 00010202\nRAX: 0000000000000001 RBX: ffff880161514480 RCX: 00000000ffffffff\nRDX: 00000000ffffffff RSI: ffff880140c690c0 RDI: ffff880140c690c0\nRBP: ffff88019e7e9eb8 R08: 00000000000000d0 R09: 0000000000000000\nR10: 0000000000000001 R11: 0000000000000040 R12: ffff880140c690c0\nR13: ffff88019e77aea0 R14: 00007fff336b0a5c R15: 0000000000000001\nFS: 00007f12f50d97c0(0000) GS:ffff880007400000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f8f461bc000 CR3: 00000001b26ce000 CR4: 00000000000006f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400\nProcess master (pid: 2436, threadinfo ffff88019e7e8000, task ffff88019e77aea0)\nStack:\n ffff88019e7e9ec8 ffffffff810698cd ffff88019e7e9ef8 ffffffff81069b45\n\u003c0\u003e ffff880161514180 ffff880161514480 ffff880161514180 0000000000000000\n\u003c0\u003e ffff88019e7e9f28 ffffffff8106aace 0000000000000001 0000000000000246\nCall Trace:\n [\u003cffffffff810698cd\u003e] put_cred+0x13/0x15\n [\u003cffffffff81069b45\u003e] commit_creds+0x16b/0x175\n [\u003cffffffff8106aace\u003e] set_current_groups+0x47/0x4e\n [\u003cffffffff8106ac89\u003e] sys_setgroups+0xf6/0x105\n [\u003cffffffff81009b02\u003e] system_call_fastpath+0x16/0x1b\nCode: 48 8d 71 ff e8 7e 4e 15 00 85 c0 78 0b 8b 75 ec 48 89 df e8 ef 4a 15 00\n48 83 c4 18 5b c9 c3 55 8b 07 8b 07 48 89 e5 85 c0 74 04 \u003c0f\u003e 0b eb fe 65 48 8b\n04 25 00 cc 00 00 48 3b b8 58 04 00 00 75\nRIP [\u003cffffffff81069881\u003e] __put_cred+0xc/0x45\n RSP \u003cffff88019e7e9eb8\u003e\n---[ end trace df391256a100ebdd ]---\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3c26c9d9597f982973b9b3a32364230096ab0d78", "tree": "9ae3bb2586c6c8e6cd7af2e9695aa1b742fc8aad", "parents": [ "e621ba9932aa0a90e47c12c958b3a3104915f3b9" ], "author": { "name": "Mike Frysinger", "email": "vapier@gentoo.org", "time": "Tue Jun 29 15:05:17 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 29 15:29:30 2010 -0700" }, "message": "nommu: add \u0027[stack]\u0027 label to /proc/pid/maps output\n\nAdd support to the NOMMU /proc/pid/maps file to show which mapping is the stack\nof the original thread after execve. This is largely based on the MMU code.\nSubsidiary thread stacks are not indicated.\n\nFor FDPIC, we now get:\n\n\troot:/\u003e cat /proc/self/maps\n\t02064000-02067ccc rw-p 0004d000 00:01 22 /bin/busybox\n\t0206e000-0206f35c rw-p 00006000 00:01 295 /lib/ld-uClibc.so.0\n\t025f0000-025f6f0c r-xs 00000000 00:01 295 /lib/ld-uClibc.so.0\n\t02680000-026ba6b0 r-xs 00000000 00:01 297 /lib/libc.so.0\n\t02700000-0274d384 r-xs 00000000 00:01 22 /bin/busybox\n\t02816000-02817000 rw-p 00000000 00:00 0\n\t02848000-0284c0d8 rw-p 00000000 00:00 0\n\t02860000-02880000 rw-p 00000000 00:00 0 [stack]\n\nThe semi-downside here is that for FLAT, we get:\n\n\troot:/\u003e cat /proc/155/maps\n\t029f0000-029f9000 rwxp 00000000 00:00 0 [stack]\n\nThe reason being that FLAT combines a whole lot of stuff into one map\n(including the stack). But this isn\u0027t any worse than the current output\n(which is nothing), so screw it.\n\nSigned-off-by: Mike Frysinger \u003cvapier@gentoo.org\u003e\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nCc: Greg Ungerer \u003cgerg@snapgear.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9f069af5b62919151d76b37a3b168cbb34c874c3", "tree": "a6ea761977c26adaada8e4b242832e1474cfbb58", "parents": [ "7e27d6e778cd87b6f2415515d7127eba53fe5d02" ], "author": { "name": "Michael Ellerman", "email": "michael@ellerman.id.au", "time": "Wed May 19 02:32:29 2010 +0000" }, "committer": { "name": "Grant Likely", "email": "grant.likely@secretlab.ca", "time": "Sun Jun 13 18:12:24 2010 -0600" }, "message": "of: Drop properties with \"/\" in their name\n\nSome bogus firmwares include properties with \"/\" in their name. This\ncauses problems when creating the /proc/device-tree file system,\nbecause the slash is taken to indicate a directory.\n\nWe don\u0027t care about those properties, and we don\u0027t want to encourage\nthem, so just throw them away when creating /proc/device-tree.\n\nSigned-off-by: Michael Ellerman \u003cmichael@ellerman.id.au\u003e\nTested-by: Christian Kujau \u003clists@nerdbynature.de\u003e\nSigned-off-by: Grant Likely \u003cgrant.likely@secretlab.ca\u003e\n" }, { "commit": "36e15263aa5dcf3b72f1f88437e69497782b7ab8", "tree": "a1cb0cfabb8069e96df5395ae68d187cd0ed371b", "parents": [ "57f87869f073929f8e8b3c73748aabb0cece19aa" ], "author": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Wed May 26 14:43:27 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 27 09:12:47 2010 -0700" }, "message": "kcore: add _text to KCORE_TEXT\n\nExtend KCORE_TEXT to cover the pages between _text and _stext, to allow\nexamining some important page table pages.\n\n`readelf -a` output on x86_64 before and after patch:\n\t Type Offset VirtAddr PhysAddr\nbefore LOAD 0x00007fff8100c000 0xffffffff81009000 0x0000000000000000\nafter LOAD 0x00007fff81003000 0xffffffff81000000 0x0000000000000000\n\nThe newly covered pages are:\n\n\t0xffffffff81000000 \u003cstartup_64\u003e etc.\n\t0xffffffff81001000 \u003cinit_level4_pgt\u003e\n\t0xffffffff81002000 \u003clevel3_ident_pgt\u003e\n\t0xffffffff81003000 \u003clevel3_kernel_pgt\u003e\n\t0xffffffff81004000 \u003clevel2_fixmap_pgt\u003e\n\t0xffffffff81005000 \u003clevel1_fixmap_pgt\u003e\n\t0xffffffff81006000 \u003clevel2_ident_pgt\u003e\n\t0xffffffff81007000 \u003clevel2_kernel_pgt\u003e\n\t0xffffffff81008000 \u003clevel2_spare_pgt\u003e\n\nBefore patch, /proc/kcore shows outdated contents for the above page\ntable pages, for example:\n\n\t(gdb) p level3_ident_pgt\n\t$1 \u003d {\u003ctext variable, no debug info\u003e} 0xffffffff81002000 \u003clevel3_ident_pgt\u003e\n\t(gdb) p/x *((pud_t *)\u0026level3_ident_pgt)@512\n\t$2 \u003d {{pud \u003d 0x1006063}, {pud \u003d 0x0} \u003crepeats 511 times\u003e}\n\nwhile the real content is:\n\n\troot@hp /home/wfg# hexdump -s 0x1002000 -n 4096 /dev/mem\n\t1002000 6063 0100 0000 0000 8067 0000 0000 0000\n\t1002010 0000 0000 0000 0000 0000 0000 0000 0000\n\t*\n\t1003000\n\nThat is, on a x86_64 box with 2GB memory, we can see first-1GB / full-2GB\nidentity mapping before/after patch:\n\n\t(gdb) p/x *((pud_t *)\u0026level3_ident_pgt)@512\nbefore $1 \u003d {{pud \u003d 0x1006063}, {pud \u003d 0x0} \u003crepeats 511 times\u003e}\nafter $1 \u003d {{pud \u003d 0x1006063}, {pud \u003d 0x8067}, {pud \u003d 0x0} \u003crepeats 510 times\u003e}\n\nObviously the content before patch is wrong.\n\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.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": "57f87869f073929f8e8b3c73748aabb0cece19aa", "tree": "b03572fb4d78f527061dedde89b71f5728ff6afe", "parents": [ "73d3646029138743989b6c213628484301a72eb1" ], "author": { "name": "Amerigo Wang", "email": "amwang@redhat.com", "time": "Wed May 26 14:43:26 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 27 09:12:47 2010 -0700" }, "message": "proc: remove obsolete comments\n\nA quick test shows these comments are obsolete, so just remove them.\n\nSigned-off-by: WANG Cong \u003camwang@redhat.com\u003e\nCc: 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": "73d3646029138743989b6c213628484301a72eb1", "tree": "1df20844702dbf7d8d014ae08bdb479a8350533f", "parents": [ "b3ac022cb9dc5883505a88b159d1b240ad1ef405" ], "author": { "name": "Dan Carpenter", "email": "error27@gmail.com", "time": "Wed May 26 14:43:25 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 27 09:12:47 2010 -0700" }, "message": "proc: cleanup: remove unused assignments\n\nI removed 3 unused assignments. The first two get reset on the first\nstatement of their functions. For \"err\" in root.c we don\u0027t return an\nerror and we don\u0027t use the variable again.\n\nSigned-off-by: Dan Carpenter \u003cerror27@gmail.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7e49827cc937a742ae02078b483e3eb78f791a2a", "tree": "0f3e0a8483a41b2221c74b8286b2349af03dab04", "parents": [ "6e1be45aa6ba6a36c0312f65ecf311135c73001d" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Wed May 26 14:43:22 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 27 09:12:47 2010 -0700" }, "message": "proc: get_nr_threads() doesn\u0027t need -\u003esiglock any longer\n\nNow that task-\u003esignal can\u0027t go away get_nr_threads() doesn\u0027t need\n-\u003esiglock to read signal-\u003ecount.\n\nAlso, make it inline, move into sched.h, and convert 2 other proc users of\nsignal-\u003ecount to use this (now trivial) helper.\n\nHenceforth get_nr_threads() is the only valid user of signal-\u003ecount, we\nare ready to turn it into \"int nr_threads\" or, perhaps, kill it.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nAcked-by: Roland McGrath \u003croland@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1a5cb81465b66b74bf3d6ad36e5382238de6a132", "tree": "28494edfea96752f57c88601d80819759085fade", "parents": [ "e48293fd75b3aa67f43ad6e3d2ff397caa55d58b" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Mon May 24 14:32:12 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 25 08:06:58 2010 -0700" }, "message": "pagemap: add #ifdefs CONFIG_HUGETLB_PAGE on code walking hugetlb vma\n\nIf !CONFIG_HUGETLB_PAGE, pagemap_hugetlb_range() is never called. So put\nit (and its calling function) into #ifdef block.\n\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nAcked-by: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "98c89cdd3a292af3451e47a2a33132f5183861b0", "tree": "cfad77bcfd2d04fb0b9326a859803a1ab90b0757", "parents": [ "164d44fd92e79d5bce54d0d62df9f856f7b23925", "99df95a22f7cfcf85405d4edc07c2d953542f0dd" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 19 17:23:28 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 19 17:23:28 2010 -0700" }, "message": "Merge branch \u0027bkl/procfs\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing\n\n* \u0027bkl/procfs\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing:\n sunrpc: Include missing smp_lock.h\n procfs: Kill the bkl in ioctl\n procfs: Push down the bkl from ioctl\n procfs: Use generic_file_llseek in /proc/vmcore\n procfs: Use generic_file_llseek in /proc/kmsg\n procfs: Use generic_file_llseek in /proc/kcore\n procfs: Kill BKL in llseek on proc base\n" }, { "commit": "c2f980500a81006173daf3048284b28832858616", "tree": "db8aa6354bd8393f0e2033ec04c532b72b9b0d37", "parents": [ "d79b6f4de5db0103ceb4734e42ad101d836d61d9" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue Mar 30 07:32:50 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Mon May 17 03:06:24 2010 +0200" }, "message": "procfs: Kill the bkl in ioctl\n\nThere are no more users of procfs that implement the ioctl\ncallback. Drop the bkl from this path and warn on any use\nof this callback.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: John Kacur \u003cjkacur@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\n" }, { "commit": "34441427aab4bdb3069a4ffcda69a99357abcb2e", "tree": "3beebde910f25b0945e9105017fd743c9e5241a5", "parents": [ "3c904afd7358e9ef515eb5df36b6f25c2b7fc2da" ], "author": { "name": "Robin Holt", "email": "holt@sgi.com", "time": "Tue May 11 14:06:46 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 11 17:33:41 2010 -0700" }, "message": "revert \"procfs: provide stack information for threads\" and its fixup commits\n\nOriginally, commit d899bf7b (\"procfs: provide stack information for\nthreads\") attempted to introduce a new feature for showing where the\nthreadstack was located and how many pages are being utilized by the\nstack.\n\nCommit c44972f1 (\"procfs: disable per-task stack usage on NOMMU\") was\napplied to fix the NO_MMU case.\n\nCommit 89240ba0 (\"x86, fs: Fix x86 procfs stack information for threads on\n64-bit\") was applied to fix a bug in ia32 executables being loaded.\n\nCommit 9ebd4eba7 (\"procfs: fix /proc/\u003cpid\u003e/stat stack pointer for kernel\nthreads\") was applied to fix a bug which had kernel threads printing a\nuserland stack address.\n\nCommit 1306d603f (\u0027proc: partially revert \"procfs: provide stack\ninformation for threads\"\u0027) was then applied to revert the stack pages\nbeing used to solve a significant performance regression.\n\nThis patch nearly undoes the effect of all these patches.\n\nThe reason for reverting these is it provides an unusable value in\nfield 28. For x86_64, a fork will result in the task-\u003estack_start\nvalue being updated to the current user top of stack and not the stack\nstart address. This unpredictability of the stack_start value makes\nit worthless. That includes the intended use of showing how much stack\nspace a thread has.\n\nOther architectures will get different values. As an example, ia64\ngets 0. The do_fork() and copy_process() functions appear to treat the\nstack_start and stack_size parameters as architecture specific.\n\nI only partially reverted c44972f1 (\"procfs: disable per-task stack usage\non NOMMU\") . If I had completely reverted it, I would have had to change\nmm/Makefile only build pagewalk.o when CONFIG_PROC_PAGE_MONITOR is\nconfigured. Since I could not test the builds without significant effort,\nI decided to not change mm/Makefile.\n\nI only partially reverted 89240ba0 (\"x86, fs: Fix x86 procfs stack\ninformation for threads on 64-bit\") . I left the KSTK_ESP() change in\nplace as that seemed worthwhile.\n\nSigned-off-by: Robin Holt \u003cholt@sgi.com\u003e\nCc: Stefani Seibold \u003cstefani@seibold.net\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Michal Simek \u003cmonstr@monstr.eu\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\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": "3835541dd481091c4dbf5ef83c08aed12e50fd61", "tree": "bb40567215e394392ed0167867a0bf2a5916a583", "parents": [ "9e584fbbd9fd4f0f10b8aafc9982df8d0b553e35" ], "author": { "name": "Jerome Marchand", "email": "jmarchan@redhat.com", "time": "Tue Apr 27 13:13:06 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 27 16:26:03 2010 -0700" }, "message": "procfs: fix tid fdinfo\n\nCorrect the file_operations struct in fdinfo entry of tid_base_stuff[].\n\nPresently /proc/*/task/*/fdinfo contains symlinks to opened files like\n/proc/*/fd/.\n\nSigned-off-by: Jerome Marchand \u003cjmarchan@redhat.com\u003e\nCc: Alexander Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nCc: Alexey Dobriyan \u003cadobriyan@gmail.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": "73296bc611cee009f3be6b451e827d1425b9c10f", "tree": "553af58153a05e6a6cc43d4dbcf5acdf6fc3f4c8", "parents": [ "41775e29a74ed825496c975ba19c7661e15f0523" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue Mar 30 02:33:36 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Apr 09 17:23:24 2010 +0200" }, "message": "procfs: Use generic_file_llseek in /proc/vmcore\n\n/proc/vmcore has no llseek and then falls down to use default_llseek.\nThis is racy against read_vmcore() that directly manipulates fpos\nbut it doesn\u0027t hold the bkl there so using it in llseek doesn\u0027t\nprotect anything.\n\nLet\u0027s use generic_file_llseek() instead.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: John Kacur \u003cjkacur@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\n" }, { "commit": "41775e29a74ed825496c975ba19c7661e15f0523", "tree": "6bb01c4479f3731414db777eef05162c2d2ab216", "parents": [ "34aacb2920667d405a8df15968b7f71ba46c8f18" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue Mar 30 02:24:54 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Apr 09 16:35:41 2010 +0200" }, "message": "procfs: Use generic_file_llseek in /proc/kmsg\n\nNo need to hold the bkl to seek here, none of the other\nfops callbacks use it.\n\nUse generic_file_llseek explicitly.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: John Kacur \u003cjkacur@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\n" }, { "commit": "34aacb2920667d405a8df15968b7f71ba46c8f18", "tree": "7ff58a62c025ce5aa15279176cbb22b85b341382", "parents": [ "87df842410ce5a86fdca9fbec0dba80d2aa88b6f" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue Mar 30 02:14:26 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Apr 09 16:32:02 2010 +0200" }, "message": "procfs: Use generic_file_llseek in /proc/kcore\n\n/proc/kcore has no llseek and then falls down to use default_llseek.\nThis is racy against read_kcore() that directly manipulates fpos\nbut it doesn\u0027t hold the bkl there so using it in llseek doesn\u0027t\nprotect anything.\n\nLet\u0027s use generic_file_llseek() instead.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: John Kacur \u003cjkacur@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\n" }, { "commit": "87df842410ce5a86fdca9fbec0dba80d2aa88b6f", "tree": "e8d311184e8f2695a961935882ad5269724fce04", "parents": [ "2eaa9cfdf33b8d7fb7aff27792192e0019ae8fc6" ], "author": { "name": "Arnd Bergmann", "email": "arnd@arndb.de", "time": "Wed Mar 17 23:06:02 2010 +0100" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Apr 09 16:29:12 2010 +0200" }, "message": "procfs: Kill BKL in llseek on proc base\n\nWe don\u0027t use the BKL elsewhere, so use generic_file_llseek\nso we can avoid default_llseek taking the BKL.\n\nSigned-off-by: Arnd Bergmann \u003carnd@arndb.de\u003e\n[restore proc_fdinfo_file_operations as non-seekable]\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: John Kacur \u003cjkacur@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\n" }, { "commit": "116354d177ba2da37e91cf884e3d11e67f825efd", "tree": "150227e8a5c9ce8b6dd9333593ed513c8c012686", "parents": [ "57119c34e53bbb8d244c3ff1335ef5145768538f" ], "author": { "name": "Naoya Horiguchi", "email": "n-horiguchi@ah.jp.nec.com", "time": "Tue Apr 06 14:35:04 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 07 08:38:04 2010 -0700" }, "message": "pagemap: fix pfn calculation for hugepage\n\nWhen we look into pagemap using page-types with option -p, the value of\npfn for hugepages looks wrong (see below.) This is because pte was\nevaluated only once for one vma although it should be updated for each\nhugepage. This patch fixes it.\n\n $ page-types -p 3277 -Nl -b huge\n voffset offset len flags\n 7f21e8a00 11e400 1 ___U___________H_G________________\n 7f21e8a01 11e401 1ff ________________TG________________\n ^^^\n 7f21e8c00 11e400 1 ___U___________H_G________________\n 7f21e8c01 11e401 1ff ________________TG________________\n ^^^\n\nOne hugepage contains 1 head page and 511 tail pages in x86_64 and each\ntwo lines represent each hugepage. Voffset and offset mean virtual\naddress and physical address in the page unit, respectively. The\ndifferent hugepages should not have the same offset value.\n\nWith this patch applied:\n\n $ page-types -p 3386 -Nl -b huge\n voffset offset len flags\n 7fec7a600 112c00 1 ___UD__________H_G________________\n 7fec7a601 112c01 1ff ________________TG________________\n ^^^\n 7fec7a800 113200 1 ___UD__________H_G________________\n 7fec7a801 113201 1ff ________________TG________________\n ^^^\n OK\n\nMore info:\n\n- This patch modifies walk_page_range()\u0027s hugepage walker. But the\n change only affects pagemap_read(), which is the only caller of hugepage\n callback.\n\n- Without this patch, hugetlb_entry() callback is called per vma, that\n doesn\u0027t match the natural expectation from its name.\n\n- With this patch, hugetlb_entry() is called per hugepte entry and the\n callback can become much simpler.\n\nSigned-off-by: Naoya Horiguchi \u003cn-horiguchi@ah.jp.nec.com\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "309361e09ca9e9670dc8664e5d14125bf82078af", "tree": "2886267e80efa99d5447d56305e6560fd4cce410", "parents": [ "5fbfb18d7a5b846946d52c4a10e3aaa213ec31b6" ], "author": { "name": "Dan Carpenter", "email": "error27@gmail.com", "time": "Tue Apr 06 13:45:39 2010 +0300" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 06 08:23:47 2010 -0700" }, "message": "proc: copy_to_user() returns unsigned\n\ncopy_to_user() returns the number of bytes left to be copied.\n\nThis was a typo from: d82ef020cf31 \"proc: pagemap: Hold mmap_sem during\npage walk\".\n\nSigned-off-by: Dan Carpenter \u003cerror27@gmail.com\u003e\nAcked-by: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "336f5899d287f06d8329e208fc14ce50f7ec9698", "tree": "9b762d450d5eb248a6ff8317badb7e223d93ed58", "parents": [ "a4ab2773205e8b94c18625455f85e3b6bb9d7ad6", "db217dece3003df0841bacf9556b5c06aa097dae" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Apr 05 11:37:28 2010 +0900" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Apr 05 11:37:28 2010 +0900" }, "message": "Merge branch \u0027master\u0027 into export-slabh\n" }, { "commit": "d82ef020cf31504c816803b1def94eb5ff173363", "tree": "1aac1f2260b602d28804a809783076d68a06bb33", "parents": [ "5e11611a5d22252f3f9c169a3c9377eac0c32033" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Fri Apr 02 09:11:29 2010 +0900" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Apr 04 12:06:02 2010 -0700" }, "message": "proc: pagemap: Hold mmap_sem during page walk\n\nIn initial design, walk_page_range() was designed just for walking page\ntable and it didn\u0027t require mmap_sem. Now, find_vma() etc.. are used\nin walk_page_range() and we need mmap_sem around it.\n\nThis patch adds mmap_sem around walk_page_range().\n\nBecause /proc/\u003cpid\u003e/pagemap\u0027s callback routine use put_user(), we have\nto get rid of it to do sane fix.\n\nChangelog: 2010/Apr/2\n - fixed start_vaddr and end overflow\nChangelog: 2010/Apr/1\n - fixed start_vaddr calculation\n - removed unnecessary cast.\n - removed unnecessary change in smaps.\n - use GFP_TEMPORARY instead of GFP_KERNEL\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: San Mehat \u003csan@google.com\u003e\nCc: Brian Swetland \u003cswetland@google.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\n[ Fixed kmalloc failure return code as per Matt ]\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b95c35e76b29ba812e5dabdd91592e25ec640e93", "tree": "9584cf21e47baec986f5dc5455081e8538126be1", "parents": [ "30d1872d9eb3663b4cf7bdebcbf5cd465674cced" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Apr 01 15:13:57 2010 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Apr 01 08:50:21 2010 -0700" }, "message": "oom: fix the unsafe usage of badness() in proc_oom_score()\n\nproc_oom_score(task) has a reference to task_struct, but that is all.\nIf this task was already released before we take tasklist_lock\n\n\t- we can\u0027t use task-\u003egroup_leader, it points to nowhere\n\n\t- it is not safe to call badness() even if this task is\n\t -\u003egroup_leader, has_intersects_mems_allowed() assumes\n\t it is safe to iterate over -\u003ethread_group list.\n\n\t- even worse, badness() can hit -\u003esignal \u003d\u003d NULL\n\nAdd the pid_alive() check to ensure __unhash_process() was not called.\n\nAlso, use \"task\" instead of task-\u003egroup_leader. badness() should return\nthe same result for any sub-thread. Currently this is not true, but\nthis should be changed anyway.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: stable@kernel.org\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5a0e3ad6af8660be21ca98a971cd00f331318c05", "tree": "5bfb7be11a03176a87296a43ac6647975c00a1d1", "parents": [ "ed391f4ebf8f701d3566423ce8f17e614cde9806" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Wed Mar 24 17:04:11 2010 +0900" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Mar 30 22:02:32 2010 +0900" }, "message": "include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h\n\npercpu.h is included by sched.h and module.h and thus ends up being\nincluded when building most .c files. percpu.h includes slab.h which\nin turn includes gfp.h making everything defined by the two files\nuniversally available and complicating inclusion dependencies.\n\npercpu.h -\u003e slab.h dependency is about to be removed. Prepare for\nthis change by updating users of gfp and slab facilities include those\nheaders directly instead of assuming availability. As this conversion\nneeds to touch large number of source files, the following script is\nused as the basis of conversion.\n\n http://userweb.kernel.org/~tj/misc/slabh-sweep.py\n\nThe script does the followings.\n\n* Scan files for gfp and slab usages and update includes such that\n only the necessary includes are there. ie. if only gfp is used,\n gfp.h, if slab is used, slab.h.\n\n* When the script inserts a new include, it looks at the include\n blocks and try to put the new include such that its order conforms\n to its surrounding. It\u0027s put in the include block which contains\n core kernel includes, in the same order that the rest are ordered -\n alphabetical, Christmas tree, rev-Xmas-tree or at the end if there\n doesn\u0027t seem to be any matching order.\n\n* If the script can\u0027t find a place to put a new include (mostly\n because the file doesn\u0027t have fitting include block), it prints out\n an error message indicating which .h file needs to be added to the\n file.\n\nThe conversion was done in the following steps.\n\n1. The initial automatic conversion of all .c files updated slightly\n over 4000 files, deleting around 700 includes and adding ~480 gfp.h\n and ~3000 slab.h inclusions. The script emitted errors for ~400\n files.\n\n2. Each error was manually checked. Some didn\u0027t need the inclusion,\n some needed manual addition while adding it to implementation .h or\n embedding .c file was more appropriate for others. This step added\n inclusions to around 150 files.\n\n3. The script was run again and the output was compared to the edits\n from #2 to make sure no file was left behind.\n\n4. Several build tests were done and a couple of problems were fixed.\n e.g. lib/decompress_*.c used malloc/free() wrappers around slab\n APIs requiring slab.h to be added manually.\n\n5. The script was run on all .h files but without automatically\n editing them as sprinkling gfp.h and slab.h inclusions around .h\n files could easily lead to inclusion dependency hell. Most gfp.h\n inclusion directives were ignored as stuff from gfp.h was usually\n wildly available and often used in preprocessor macros. Each\n slab.h inclusion directive was examined and added manually as\n necessary.\n\n6. percpu.h was updated not to include slab.h.\n\n7. Build test were done on the following configurations and failures\n were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my\n distributed build env didn\u0027t work with gcov compiles) and a few\n more options had to be turned off depending on archs to make things\n build (like ipr on powerpc/64 which failed due to missing writeq).\n\n * x86 and x86_64 UP and SMP allmodconfig and a custom test config.\n * powerpc and powerpc64 SMP allmodconfig\n * sparc and sparc64 SMP allmodconfig\n * ia64 SMP allmodconfig\n * s390 SMP allmodconfig\n * alpha SMP allmodconfig\n * um on x86_64 SMP allmodconfig\n\n8. percpu.h modifications were reverted so that it could be applied as\n a separate patch and serve as bisection point.\n\nGiven the fact that I had only a couple of failures from tests on step\n6, I\u0027m fairly confident about the coverage of this conversion patch.\nIf there is a breakage, it\u0027s likely to be something in one of the arch\nheaders which should be easily discoverable easily on most builds of\nthe specific arch.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nGuess-its-ok-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\n" }, { "commit": "4fd2c20d964a8fb9861045f1022475c9d200d684", "tree": "ff062c1c775a085851a38c77a81c6907fdade35d", "parents": [ "c6b6ef8bb05af632889c5536513b9f4004961f73" ], "author": { "name": "Dan Carpenter", "email": "error27@gmail.com", "time": "Tue Mar 23 13:35:42 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 24 16:31:22 2010 -0700" }, "message": "kcore: fix test for end of list\n\n\"m\" is never NULL here. We need a different test for the end of list\ncondition.\n\nSigned-off-by: Dan Carpenter \u003cerror27@gmail.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: WANG Cong \u003cxiyou.wangcong@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": "12bac0d9f4dbf3445a0319beee848d15fa32775e", "tree": "4b712e05e785c010a31d12bb4a1f662173b9fcee", "parents": [ "e17a5765f20d1219c3f05eb17aab11671978e0ec" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Fri Mar 05 13:44:00 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Mar 06 11:26:45 2010 -0800" }, "message": "proc: warn on non-existing proc entries\n\n* warn if creation goes on to non-existent directory\n* warn if removal goes on from non-existing directory\n* warn if non-existing proc entry is removed\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e17a5765f20d1219c3f05eb17aab11671978e0ec", "tree": "6dae8ad2358efac94587dd86104fdccc715fbfde", "parents": [ "5748150eabdacd3f870c311b63d32f5e312bf624" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Fri Mar 05 13:43:59 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Mar 06 11:26:45 2010 -0800" }, "message": "proc: do translation + unlink atomically at remove_proc_entry()\n\nremove_proc_entry() does\n\n\tlock\n\tlookup parent\n\tunlock\n\tlock\n\tunlink proc entry from lists\n\tunlock\n\nwhich can be made bit more correct by doing parent translation + unlink\nwithout dropping lock.\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d554ed895dc8f293cc712c71f14b101ace82579a", "tree": "fd29ba33d640e156e2ca4267ffbdb9dc566fd3d6", "parents": [ "221e3ebf6d5f2625373573155924e39f196c5d3d" ], "author": { "name": "Jiri Slaby", "email": "jslaby@suse.cz", "time": "Fri Mar 05 13:42:42 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Mar 06 11:26:29 2010 -0800" }, "message": "fs: use rlimit helpers\n\nMake sure compiler won\u0027t do weird things with limits. E.g. fetching them\ntwice may return 2 different values after writable limits are implemented.\n\nI.e. either use rlimit helpers added in commit 3e10e716abf3 (\"resource:\nadd helpers for fetching rlimits\") or ACCESS_ONCE if not applicable.\n\nSigned-off-by: Jiri Slaby \u003cjslaby@suse.cz\u003e\nCc: Alexander Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b084d4353ff99d824d3bc5a5c2c22c70b1fba722", "tree": "8178db2b337fc8a36e6ca2e1fc2e7d7473957e27", "parents": [ "34e55232e59f7b19050267a05ff1226e5cd122a5" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Fri Mar 05 13:41:42 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Mar 06 11:26:24 2010 -0800" }, "message": "mm: count swap usage\n\nA frequent questions from users about memory management is what numbers of\nswap ents are user for processes. And this information will give some\nhints to oom-killer.\n\nBesides we can count the number of swapents per a process by scanning\n/proc/\u003cpid\u003e/smaps, this is very slow and not good for usual process\ninformation handler which works like \u0027ps\u0027 or \u0027top\u0027. (ps or top is now\nenough slow..)\n\nThis patch adds a counter of swapents to mm_counter and update is at each\nswap events. Information is exported via /proc/\u003cpid\u003e/status file as\n\n[kamezawa@bluextal memory]$ cat /proc/self/status\nName: cat\nState: R (running)\nTgid: 2910\nPid: 2910\nPPid: 2823\nTracerPid: 0\nUid: 500 500 500 500\nGid: 500 500 500 500\nFDSize: 256\nGroups: 500\nVmPeak: 82696 kB\nVmSize: 82696 kB\nVmLck: 0 kB\nVmHWM: 432 kB\nVmRSS: 432 kB\nVmData: 172 kB\nVmStk: 84 kB\nVmExe: 48 kB\nVmLib: 1568 kB\nVmPTE: 40 kB\nVmSwap: 0 kB \u003c\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d this.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\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": "d559db086ff5be9bcc259e5aa50bf3d881eaf1d1", "tree": "aa968c8a4093234e4623a34c0415bf9d8683671c", "parents": [ "19b629f581320999ddb9f6597051b79cdb53459c" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Fri Mar 05 13:41:39 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Mar 06 11:26:23 2010 -0800" }, "message": "mm: clean up mm_counter\n\nPresently, per-mm statistics counter is defined by macro in sched.h\n\nThis patch modifies it to\n - defined in mm.h as inlinf functions\n - use array instead of macro\u0027s name creation.\n\nThis patch is for reducing patch size in future patch to modify\nimplementation of per-mm counter.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\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": "0f2cc4ecd81dc1917a041dc93db0ada28f8356fa", "tree": "f128b50f48f50f0cda6d2b20b53e9ad6e2dfded3", "parents": [ "1fae4cfb97302289bb5df6a8195eb28385d0b002", "9643f5d94aadd47a5fa9754fb60f2c957de05903" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 04 08:15:33 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 04 08:15:33 2010 -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: (52 commits)\n init: Open /dev/console from rootfs\n mqueue: fix typo \"failues\" -\u003e \"failures\"\n mqueue: only set error codes if they are really necessary\n mqueue: simplify do_open() error handling\n mqueue: apply mathematics distributivity on mq_bytes calculation\n mqueue: remove unneeded info-\u003emessages initialization\n mqueue: fix mq_open() file descriptor leak on user-space processes\n fix race in d_splice_alias()\n set S_DEAD on unlink() and non-directory rename() victims\n vfs: add NOFOLLOW flag to umount(2)\n get rid of -\u003emnt_parent in tomoyo/realpath\n hppfs can use existing proc_mnt, no need for do_kern_mount() in there\n Mirror MS_KERNMOUNT in -\u003emnt_flags\n get rid of useless vfsmount_lock use in put_mnt_ns()\n Take vfsmount_lock to fs/internal.h\n get rid of insanity with namespace roots in tomoyo\n take check for new events in namespace (guts of mounts_poll()) to namespace.c\n Don\u0027t mess with generic_permission() under -\u003ed_lock in hpfs\n sanitize const/signedness for udf\n nilfs: sanitize const/signedness in dealing with -\u003ed_name.name\n ...\n\nFix up fairly trivial (famous last words...) conflicts in\ndrivers/infiniband/core/uverbs_main.c and security/tomoyo/realpath.c\n" }, { "commit": "9f5596af44514f99e3a654a4f7cb813354b9e516", "tree": "6a579bf387683b910bd32e8aa7edef9956e58dd1", "parents": [ "e21e7095a78867364d7aa9223d833ccb966f93f3" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Feb 05 00:40:25 2010 -0500" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Mar 03 14:07:59 2010 -0500" }, "message": "take check for new events in namespace (guts of mounts_poll()) to namespace.c\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "587d4a17d837ac0f17edb26f1b6c80c0abda6343", "tree": "ff9c8ee81e102f297d53fca6ecda25af2bb8f818", "parents": [ "193cf4b99113a4550598ba9e8343e591fc062e23" ], "author": { "name": "Helight.Xu", "email": "helight.xu@gmail.com", "time": "Wed Dec 30 13:24:41 2009 +0800" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Mar 03 13:00:18 2010 -0500" }, "message": "some clean up in fs/proc\n\nEXPORT_SYMBOL(proc_symlink);\nEXPORT_SYMBOL(proc_mkdir);\nEXPORT_SYMBOL(create_proc_entry);\nEXPORT_SYMBOL(proc_create_data);\nEXPORT_SYMBOL(remove_proc_entry);\n\nThose EXPORT_SYMBOL shouldn\u0027t be in fs/proc/root.c,\nshould be in fs/proc/generic.c.\n\nSigned-off-by: Helight.Xu \u003chelight.xu@gmail.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "b4ccebdd37ff70d349321a198f416ba737a5e833", "tree": "275d717070346722c3aacd8355fb4f743216e03b", "parents": [ "30ff056c42c665b9ea535d8515890857ae382540", "ef57471a73b67a7b65fd8708fd55c77cb7c619af" ], "author": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Mon Mar 01 09:36:31 2010 +1100" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Mon Mar 01 09:36:31 2010 +1100" }, "message": "Merge branch \u0027next\u0027 into for-linus\n" } ], "next": "642c4c75a765d7a3244ab39c8e6fb09be21eca5b" }