)]}' { "log": [ { "commit": "ef5dc121d5a0bb1fa477c5395277259f07d318a3", "tree": "5af1d24406aa014eed72f07097316ba6f7d0d04f", "parents": [ "950eaaca681c44aab87a46225c9e44f902c080aa" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Thu Sep 02 15:48:16 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Sep 03 08:19:51 2010 +0200" }, "message": "mutex: Fix annotations to include it in kernel-locking docbook\n\nFix kernel-doc notation in linux/mutex.h and kernel/mutex.c,\nthen add these 2 files to the kernel-locking docbook as the\nMutex API reference chapter.\n\nAdd one API function to mutex-design.txt and correct a typo in\nthat file.\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nLKML-Reference: \u003c20100902154816.6cc2f9ad.randy.dunlap@oracle.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "a511e3f968c462a55ef58697257f5347c73d306e", "tree": "7b331c694e0149f4f9e692eaec1726d28cedac8d", "parents": [ "23b94b967f118bef941369238f33c8140be46539" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Wed Apr 29 15:59:58 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Apr 30 09:01:34 2009 +0200" }, "message": "mutex: add atomic_dec_and_mutex_lock(), fix\n\ninclude/linux/mutex.h:136: warning: \u0027mutex_lock\u0027 declared inline after being called\n include/linux/mutex.h:136: warning: previous declaration of \u0027mutex_lock\u0027 was here\n\nuninline it.\n\n[ Impact: clean up and uninline, address compiler warning ]\n\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Eric Paris \u003ceparis@redhat.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c200904292318.n3TNIsi6028340@imap1.linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "b1fca26631f76a5e8b18435a43f5d82b8734da4b", "tree": "6b8e651239219e85a6b3b9238878c4a6eb4f2d9c", "parents": [ "56a50adda49b2020156616c4eb15353e0f9ad7de" ], "author": { "name": "Eric Paris", "email": "eparis@redhat.com", "time": "Mon Mar 23 18:22:09 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Apr 29 16:45:54 2009 +0200" }, "message": "mutex: add atomic_dec_and_mutex_lock()\n\nMuch like the atomic_dec_and_lock() function in which we take an hold a\nspin_lock if we drop the atomic to 0 this function takes and holds the\nmutex if we dec the atomic to 0.\n\nSigned-off-by: Eric Paris \u003ceparis@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nOrig-LKML-Reference: \u003c20090323172417.410913479@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "0d66bf6d3514b35eb6897629059443132992dbd7", "tree": "a47ee0fc3299361cf3b222c8242741adfedaab74", "parents": [ "41719b03091911028116155deddc5eedf8c45e37" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Jan 12 14:01:47 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jan 14 18:09:02 2009 +0100" }, "message": "mutex: implement adaptive spinning\n\nChange mutex contention behaviour such that it will sometimes busy wait on\nacquisition - moving its behaviour closer to that of spinlocks.\n\nThis concept got ported to mainline from the -rt tree, where it was originally\nimplemented for rtmutexes by Steven Rostedt, based on work by Gregory Haskins.\n\nTesting with Ingo\u0027s test-mutex application (http://lkml.org/lkml/2006/1/8/50)\ngave a 345% boost for VFS scalability on my testbox:\n\n # ./test-mutex-shm V 16 10 | grep \"^avg ops\"\n avg ops/sec: 296604\n\n # ./test-mutex-shm V 16 10 | grep \"^avg ops\"\n avg ops/sec: 85870\n\nThe key criteria for the busy wait is that the lock owner has to be running on\na (different) cpu. The idea is that as long as the owner is running, there is a\nfair chance it\u0027ll release the lock soon, and thus we\u0027ll be better off spinning\ninstead of blocking/scheduling.\n\nSince regular mutexes (as opposed to rtmutexes) do not atomically track the\nowner, we add the owner in a non-atomic fashion and deal with the races in\nthe slowpath.\n\nFurthermore, to ease the testing of the performance impact of this new code,\nthere is means to disable this behaviour runtime (without having to reboot\nthe system), when scheduler debugging is enabled (CONFIG_SCHED_DEBUG\u003dy),\nby issuing the following command:\n\n # echo NO_OWNER_SPIN \u003e /debug/sched_features\n\nThis command re-enables spinning again (this is also the default):\n\n # echo OWNER_SPIN \u003e /debug/sched_features\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "d98d38f2014ab79f28c126ff175d034891f7aefc", "tree": "4c23b3c5e202b3ecb0ba35f167da6c204cbd862d", "parents": [ "d1a76187a5be4f89c6cb19d800cb5fb7aac735c5" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Wed Oct 29 14:24:09 2008 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Oct 30 19:55:00 2008 +0100" }, "message": "mutex: improve header comment to be actually informative about the API\n\nImpact: improve documentation\n\nIt\u0027s nice to say that mutex_trylock follows the spin_trylock convention.\nIt\u0027s a lot nicer if the comment also says which that is... make it so.\n\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\n" }, { "commit": "ec7015840ad7a8cdc87f52367ffe9c0b0401d919", "tree": "4d0d7dc6f4ab1e364521a866e0150794d9739a28", "parents": [ "9f741cb8fecef923cce1dff820ac6aa78c12d136" ], "author": { "name": "Harvey Harrison", "email": "harvey.harrison@gmail.com", "time": "Fri Feb 08 04:19:55 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Feb 08 09:22:31 2008 -0800" }, "message": "Remove fastcall from linux/include\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Harvey Harrison \u003charvey.harrison@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": "ad776537cc6b4b936cfd11893e7b698dfa072666", "tree": "b553f03f34ce8750150765755abaaec27943fa0d", "parents": [ "0b94e97a25d9b06ef17fca8da23169200bead1e2" ], "author": { "name": "Liam R. Howlett", "email": "howlett@gmail.com", "time": "Thu Dec 06 17:37:59 2007 -0500" }, "committer": { "name": "Matthew Wilcox", "email": "willy@linux.intel.com", "time": "Thu Dec 06 17:37:59 2007 -0500" }, "message": "Add mutex_lock_killable\n\nSimilar to mutex_lock_interruptible, it can be interrupted by a fatal\nsignal only.\n\nSigned-off-by: Liam R. Howlett \u003chowlett@gmail.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Matthew Wilcox \u003cwilly@linux.intel.com\u003e\n" }, { "commit": "f20fda486164264e0c9a64f3256b3238d0dc78d7", "tree": "4daca9e4a4bee1a3776c965b8b47c64f14420b3b", "parents": [ "1019f96d2d3aa4997d8055bd0c32c97f0fc21d06" ], "author": { "name": "Matti Linnanvuori", "email": "mattilinnanvuori@yahoo.com", "time": "Tue Oct 16 23:29:41 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:57 2007 -0700" }, "message": "Mutex documentation is unclear about software interrupts, tasklets and timers\n\nAcked-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e4564f79d4b6923da7360df4b24a48cc2d4160de", "tree": "393a5fcc5efe94ae669b8ff21f36db2726f5f51d", "parents": [ "3aa416b07f0adf01c090baab26fb70c35ec17623" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Oct 11 22:11:12 2007 +0200" }, "committer": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Oct 11 22:11:12 2007 +0200" }, "message": "lockdep: fixup mutex annotations\n\nThe fancy mutex_lock fastpath has too many indirections to track the caller\nhence all contentions are perceived to come from mutex_lock().\n\nAvoid this by explicitly not using the fastpath code (it was disabled already\nanyway).\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "18d8362d517cb2bd97761294924fe6c2a6ee5e3c", "tree": "fff49e54cb725ba33ddf4453fb866838ad6ceeca", "parents": [ "ae030e435f5400cff77c52506a8d3d7278f0947c" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Wed May 09 02:33:39 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed May 09 12:30:49 2007 -0700" }, "message": "mutex_lock_interruptible(): add __must_check\n\nIt\u0027s not sane to use mutex_lock_interruptible() and to then ignore the result.\n\nDitto down_interruptible(), but I\u0027m lazy.\n\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "45f8bde0d0d6deb168b45998c72b4fbeb2f57efb", "tree": "69ffee8cc05f3ffaa437412f55832f7276125e8b", "parents": [ "a8d814b5dd7a1bc5c19ae32d35b8bd4d8a510eae" ], "author": { "name": "Robert P. J. Day", "email": "rpjday@mindspring.com", "time": "Fri Jan 26 00:57:09 2007 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Jan 26 13:51:00 2007 -0800" }, "message": "[PATCH] fix various kernel-doc in header files\n\nFix a number of kernel-doc entries for header files in include/linux by\nmaking sure they begin with the appropriate \u0027/**\u0027 notation and use @var\nnotation.\n\nSigned-off-by: Robert P. J. Day \u003crpjday@mindspring.com\u003e\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d63a5a74dee87883fda6b7d170244acaac5b05e8", "tree": "8b12bc626b8f1507b7b550865c5f8282bcac6c27", "parents": [ "6796bf54a64df36f96a42ae222423fffe36c58a5" ], "author": { "name": "NeilBrown", "email": "neilb@suse.de", "time": "Fri Dec 08 02:36:17 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Fri Dec 08 08:28:39 2006 -0800" }, "message": "[PATCH] lockdep: avoid lockdep warning in md\n\nmd_open takes -\u003ereconfig_mutex which causes lockdep to complain. This\n(normally) doesn\u0027t have deadlock potential as the possible conflict is with a\nreconfig_mutex in a different device.\n\nI say \"normally\" because if a loop were created in the array-\u003emember hierarchy\na deadlock could happen. However that causes bigger problems than a deadlock\nand should be fixed independently.\n\nSo we flag the lock in md_open as a nested lock. This requires defining\nmutex_lock_interruptible_nested.\n\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Neil Brown \u003cneilb@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "6cfd76a26d9fe2ba54b9d496a48c1d9285e5c5ed", "tree": "1114a0630c5045d0650c6d78a8097fdea6f94d8e", "parents": [ "a4c410f00f7ca4bd448b0d63f6f882fd244dc991" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Dec 06 20:37:22 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:36 2006 -0800" }, "message": "[PATCH] lockdep: name some old style locks\n\nName some of the remaning \u0027old_style_spin_init\u0027 locks\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "ef5d4707b9065c0cf8a69fa3716893f3b75201ba", "tree": "9ec92f31356bf404486c1b26df9fa40bd784f983", "parents": [ "8a25d5debff2daee280e83e09d8c25d67c26a972" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jul 03 00:24:55 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jul 03 15:27:04 2006 -0700" }, "message": "[PATCH] lockdep: prove mutex locking correctness\n\nUse the lock validator framework to prove mutex locking correctness.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "9a11b49a805665e13a56aa067afaf81d43ec1514", "tree": "bf499956e3f67d1211d68ab1e2eb76645f453dfb", "parents": [ "fb7e42413a098cc45b3adf858da290033af62bae" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jul 03 00:24:33 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jul 03 15:27:01 2006 -0700" }, "message": "[PATCH] lockdep: better lock debugging\n\nGeneric lock debugging:\n\n - generalized lock debugging framework. For example, a bug in one lock\n subsystem turns off debugging in all lock subsystems.\n\n - got rid of the caller address passing (__IP__/__IP_DECL__/etc.) from\n the mutex/rtmutex debugging code: it caused way too much prototype\n hackery, and lockdep will give the same information anyway.\n\n - ability to do silent tests\n\n - check lock freeing in vfree too.\n\n - more finegrained debugging options, to allow distributions to\n turn off more expensive debugging features.\n\nThere\u0027s no separate \u0027held mutexes\u0027 list anymore - but there\u0027s a \u0027held locks\u0027\nstack within lockdep, which unifies deadlock detection across all lock\nclasses. (this is independent of the lockdep validation stuff - lockdep first\nchecks whether we are holding a lock already)\n\nHere are the current debugging options:\n\nCONFIG_DEBUG_MUTEXES\u003dy\nCONFIG_DEBUG_LOCK_ALLOC\u003dy\n\nwhich do:\n\n config DEBUG_MUTEXES\n bool \"Mutex debugging, basic checks\"\n\n config DEBUG_LOCK_ALLOC\n bool \"Detect incorrect freeing of live mutexes\"\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a4fc7ab1d065a9dd89ed0e74439ef87d4a16e980", "tree": "6312597ad183ee45e8769b1bc5b0035bfa681d64", "parents": [ "a8b9ee7396ccc8db3bdb4108993556acbe2d3527" ], "author": { "name": "David Woodhouse", "email": "dwmw2@infradead.org", "time": "Wed Jan 11 14:41:26 2006 +0000" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Jan 11 08:14:16 2006 -0800" }, "message": "[PATCH] fix/simplify mutex debugging code\n\nLet\u0027s switch mutex_debug_check_no_locks_freed() to take (addr, len) as\narguments instead, since all its callers were just calculating the \u0027to\u0027\naddress for themselves anyway... (and sometimes doing so badly).\n\nSigned-off-by: David Woodhouse \u003cdwmw2@infradead.org\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a8b9ee7396ccc8db3bdb4108993556acbe2d3527", "tree": "e73cf2abc7b2317523d1fd53e4a0aebdec6447ea", "parents": [ "05f6ece6f37f987e9de643f6f76e8fb5d5b9e014" ], "author": { "name": "David S. Miller", "email": "davem@sunset.davemloft.net", "time": "Wed Jan 11 00:15:16 2006 -0800" }, "committer": { "name": "David S. Miller", "email": "davem@sunset.davemloft.net", "time": "Wed Jan 11 00:15:16 2006 -0800" }, "message": "[MUTEX]: linux/mutex.h needs linux/linkage.h too\n\nSigned-off-by: David S. Miller \u003cdavem@davemloft.net\u003e\n" }, { "commit": "6053ee3b32e3437e8c1e72687850f436e779bd49", "tree": "bb845004eb66554c569bc53a1efc87365c8a3cbe", "parents": [ "2acbb8c657af86b2fa5b185f1d7048385e310585" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jan 09 15:59:19 2006 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@hera.kernel.org", "time": "Mon Jan 09 15:59:19 2006 -0800" }, "message": "[PATCH] mutex subsystem, core\n\nmutex implementation, core files: just the basic subsystem, no users of it.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Arjan van de Ven \u003carjan@infradead.org\u003e\n" } ] }