)]}' { "log": [ { "commit": "8a102eed9c4e1d21bad07a8fd97bd4fbf125d966", "tree": "9ec99f046b94971db46b08a87d7eab3e84c4acd4", "parents": [ "3df494a32b936aef76d893f5065f962ebd9b9437" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed Dec 13 00:34:30 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Wed Dec 13 09:05:49 2006 -0800" }, "message": "[PATCH] PM: Fix SMP races in the freezer\n\nCurrently, to tell a task that it should go to the refrigerator, we set the\nPF_FREEZE flag for it and send a fake signal to it. Unfortunately there\nare two SMP-related problems with this approach. First, a task running on\nanother CPU may be updating its flags while the freezer attempts to set\nPF_FREEZE for it and this may leave the task\u0027s flags in an inconsistent\nstate. Second, there is a potential race between freeze_process() and\nrefrigerator() in which freeze_process() running on one CPU is reading a\ntask\u0027s PF_FREEZE flag while refrigerator() running on another CPU has just\nset PF_FROZEN for the same task and attempts to reset PF_FREEZE for it. If\nthe refrigerator wins the race, freeze_process() will state that PF_FREEZE\nhasn\u0027t been set for the task and will set it unnecessarily, so the task\nwill go to the refrigerator once again after it\u0027s been thawed.\n\nTo solve first of these problems we need to stop using PF_FREEZE to tell\ntasks that they should go to the refrigerator. Instead, we can introduce a\nspecial TIF_*** flag and use it for this purpose, since it is allowed to\nchange the other tasks\u0027 TIF_*** flags and there are special calls for it.\n\nTo avoid the freeze_process()-refrigerator() race we can make\nfreeze_process() to always check the task\u0027s PF_FROZEN flag after it\u0027s read\nits \"freeze\" flag. We should also make sure that refrigerator() will\nalways reset the task\u0027s \"freeze\" flag after it\u0027s set PF_FROZEN for it.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: Russell King \u003crmk@arm.linux.org.uk\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc: Andi Kleen \u003cak@muc.de\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "3df494a32b936aef76d893f5065f962ebd9b9437", "tree": "825a96b219eeb87ef7a627a2494cf4fa7cd4d03e", "parents": [ "6a2d7a955d8de6cb19ed9cd194b3c83008a22c32" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed Dec 13 00:34:28 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Wed Dec 13 09:05:49 2006 -0800" }, "message": "[PATCH] PM: Fix freezing of stopped tasks\n\nCurrently, if a task is stopped (ie. it\u0027s in the TASK_STOPPED state), it\nis considered by the freezer as unfreezeable. However, there may be a race\nbetween the freezer and the delivery of the continuation signal to the task\nresulting in the task running after we have finished freezing the other\ntasks. This, in turn, may lead to undesirable effects up to and including\ndata corruption.\n\nTo prevent this from happening we first need to make the freezer consider\nstopped tasks as freezeable. For this purpose we need to make freezeable()\nstop returning 0 for these tasks and we need to force them to enter the\nrefrigerator. However, if there\u0027s no continuation signal in the meantime,\nthe stopped tasks should remain stopped after all processes have been\nthawed, so we need to send an additional SIGSTOP to each of them before\nwaking it up.\n\nAlso, a stopped task that has just been woken up should first check if\nthere\u0027s a freezing request for it and go to the refrigerator if that\u0027s the\ncase.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Pavel Machek \u003cpavel@ucw.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "11b2ce2ba90f801e2a5ebba4e6b7da72d87f2b13", "tree": "e7477edb04a15a3128523877558e1eb8694adbc9", "parents": [ "a9b6f562f14dc28fb4b2415f0f275cede0abe9b5" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed Dec 06 20:34:40 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:28 2006 -0800" }, "message": "[PATCH] swsusp: Untangle freeze_processes\n\nMove the loop from freeze_processes() to a separate function and call it\nindependently for user space processes and kernel threads so that the order\nof freezing tasks is clearly visible.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: Nigel Cunningham \u003cnigel@suspend2.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a9b6f562f14dc28fb4b2415f0f275cede0abe9b5", "tree": "8d83009585877bf4c5f263690468d35105058822", "parents": [ "a6d70980602e6f1869ebcdcbfaf55a0a5941583e" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed Dec 06 20:34:37 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:28 2006 -0800" }, "message": "[PATCH] swsusp: Untangle thaw_processes\n\nMove the loop from thaw_processes() to a separate function and call it\nindependently for kernel threads and user space processes so that the order\nof thawing tasks is clearly visible.\n\nDrop thaw_kernel_threads() which is never used.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: Nigel Cunningham \u003cnigel@suspend2.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "3eb1b3a40722cbb46631db373af66d13d1e7ac81", "tree": "34b2d04387845a7074c5665269acc86b03812f0d", "parents": [ "0d3a9abe8ae055e1052295698bcd0722c92eff47" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed Dec 06 20:34:34 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:28 2006 -0800" }, "message": "[PATCH] suspend to disk fails if gdb is suspended with a traced child\n\nFix http://bugzilla.kernel.org/show_bug.cgi?id\u003d7534\n\nFix the freezing of processes so that it won\u0027t fail if there is a traced\nprocess the parent of which has been stopped.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: maurice barnum \u003cpixi+kbug@burble.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "ff39593ad0ff7a79a3717edac6634407aa8200c2", "tree": "571e02e20d5d211224567d5cc22333196cf6f563", "parents": [ "14b5b7cfaa110b1d25b8f80b01a8c97cf2db30bc" ], "author": { "name": "Nigel Cunningham", "email": "ncunningham@linuxmail.org", "time": "Wed Dec 06 20:34:28 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:28 2006 -0800" }, "message": "[PATCH] swsusp: thaw userspace and kernel space separately\n\nModify process thawing so that we can thaw kernel space without thawing\nuserspace, and thaw kernelspace first. This will be useful in later\npatches, where I intend to get swsusp thawing kernel threads only before\nseeking to free memory.\n\nSigned-off-by: Nigel Cunningham \u003cnigel@suspend2.net\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "14b5b7cfaa110b1d25b8f80b01a8c97cf2db30bc", "tree": "0c07f82d699c2aedbd27bf38acfa4ff14d6951fc", "parents": [ "32d50f57dab94d8c46566a903bbb633ee72fdcc2" ], "author": { "name": "Nigel Cunningham", "email": "ncunningham@linuxmail.org", "time": "Wed Dec 06 20:34:26 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:28 2006 -0800" }, "message": "[PATCH] swsusp: clean up whitespace in freezer output\n\nMinor whitespace and formatting modifications for the freezer.\n\nSigned-off-by: Nigel Cunningham \u003cnigel@suspend2.net\u003e\nAcked-by: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "32d50f57dab94d8c46566a903bbb633ee72fdcc2", "tree": "ab56f3e10bd6eebd3f6ea0e27f68a00e53a6d32a", "parents": [ "7dfb71030f7636a0d65200158113c37764552f93" ], "author": { "name": "Nigel Cunningham", "email": "ncunningham@linuxmail.org", "time": "Wed Dec 06 20:34:25 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:27 2006 -0800" }, "message": "[PATCH] swsusp: quieten Freezer if !CONFIG_PM_DEBUG\n\nThe freezer currently prints an \u0027\u003d\u0027 for every process that is frozen. This\nis pretty pointless, as the equals sign says nothing about which process is\nfrozen, and makes logs look messier (especially if there were a large\nnumber of processes running). All we really need to know is that we\nstarted trying to freeze processes and what processes (if any) failed to\nfreeze, or that we succeeded.\n\nSigned-off-by: Nigel Cunningham \u003cnigel@suspend2.net\u003e\nAcked-by: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "7dfb71030f7636a0d65200158113c37764552f93", "tree": "276b812903d377b16d8828e888552fd256f48aab", "parents": [ "8a05aac2631aa0e6494d9dc990f8c68ed8b8fde7" ], "author": { "name": "Nigel Cunningham", "email": "ncunningham@linuxmail.org", "time": "Wed Dec 06 20:34:23 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:27 2006 -0800" }, "message": "[PATCH] Add include/linux/freezer.h and move definitions from sched.h\n\nMove process freezing functions from include/linux/sched.h to freezer.h, so\nthat modifications to the freezer or the kernel configuration don\u0027t require\nrecompiling just about everything.\n\n[akpm@osdl.org: fix ueagle driver]\nSigned-off-by: Nigel Cunningham \u003cnigel@suspend2.net\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a7ef7878ea7c8bca9b624db3f61223cdadda2a0a", "tree": "3727435826f2fe3d054f0f3fbc3e60f2b37d8bad", "parents": [ "f5d635f649607b09b0b4620d25d028fd2b1b7ea5" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Sat Aug 05 12:13:42 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Aug 06 08:57:45 2006 -0700" }, "message": "[PATCH] Make suspend possible with a traced process at a breakpoint\n\nIt should be possible to suspend, either to RAM or to disk, if there\u0027s a\ntraced process that has just reached a breakpoint. However, this is a\nspecial case, because its parent process might have been frozen already and\nthen we are unable to deliver the \"freeze\" signal to the traced process.\nIf this happens, it\u0027s better to cancel the freezing of the traced process.\n\nRef. http://bugzilla.kernel.org/show_bug.cgi?id\u003d6787\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Pavel Machek \u003cpavel@ucw.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "85b6bce3658a823aa169586fe71ffba0f12ccc71", "tree": "ad2ca0b501d2ff767889d15dfda22abec75f38c4", "parents": [ "1a75a3f0680d9c4bc4761512658b6fd664032e18" ], "author": { "name": "Pavel Machek", "email": "pavel@suse.cz", "time": "Fri Mar 31 02:30:06 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Mar 31 12:18:50 2006 -0800" }, "message": "[PATCH] Fix suspend with traced tasks\n\nstrace /bin/bash misbehaves after resume; this fixes it.\n\n(akpm: it\u0027s scary calling refrigerator() in state TASK_TRACED, but it seems to\ndo the right thing).\n\nSigned-off-by: Pavel Machek \u003cpavel@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "02aaeb9b952f30b1ad6284d5d45be02030f679db", "tree": "6577fcc544d34fbc9951be5dc1089ac227440573", "parents": [ "6e1819d615f24ce0726a7d0bd3dd0152d7b21654" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Thu Mar 23 03:00:04 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Mar 23 07:38:08 2006 -0800" }, "message": "[PATCH] swsusp: freeze user space processes first\n\nAllow swsusp to freeze processes successfully under heavy load by freezing\nuserspace processes before kernel threads.\n\n[Thanks to Nigel Cunningham \u003cnigel@suspend2.net\u003e for suggesting the\nway to go.]\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Pavel Machek \u003cpavel@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "543cc27d09643640cbc34189c03a40beb8227aef", "tree": "034b4141ed5ac76b220d55c738a0eda668c1a490", "parents": [ "74c7e2efbe37378026f00ad9e7253796d7b2fc99" ], "author": { "name": "Pavel Machek", "email": "pavel@ucw.cz", "time": "Thu Mar 23 03:00:02 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Mar 23 07:38:07 2006 -0800" }, "message": "[PATCH] swsusp: documentation updates\n\nUpdate suspend-to-RAM documentation with new machines, and makes message\nwhen processes can\u0027t be stopped little clearer. (In one case, waiting\nlonger actually did help).\n\nFrom: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\n\n Warn in the documentation that data may be lost if there are some\n filesystems mounted from USB devices before suspend.\n\n [Thanks to Alan Stern for providing the answer to the question in the\n Q:-A: part.]\n\nSigned-off-by: Pavel Machek \u003cpavel@suse.cz\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "6161b2ce8116b9a623260ab811e2c035b3fac2e5", "tree": "8cb36b11631c0843fb5a7e600626a2f6a230846b", "parents": [ "99dc7d63e0dcb457580241055b2a39d011309db8" ], "author": { "name": "Pavel Machek", "email": "pavel@ucw.cz", "time": "Sat Sep 03 15:57:05 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:06:17 2005 -0700" }, "message": "[PATCH] pm: fix process freezing\n\nIf process freezing fails, some processes are frozen, and rest are left in\n\"were asked to be frozen\" state. Thats wrong, we should leave it in some\nconsistent state.\n\nSigned-off-by: Pavel Machek \u003cpavel@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "2a23b5d1e119fd10e25b8e93464c8d549f5a5c5d", "tree": "60eede3a1a0a92837c0207de2750880d9a309db1", "parents": [ "52fdd08903a1d1162e184114837e232640191627" ], "author": { "name": "Pavel Machek", "email": "pavel@ucw.cz", "time": "Sat Sep 03 15:56:53 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:06:14 2005 -0700" }, "message": "[PATCH] remove busywait in refrigerator\n\nThis should make refrigerator sleep properly, not busywait after the first\nschedule() returns.\n\nSigned-off-by: Pavel Machek \u003cpavel@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "1322ad41513f8f9196801f53cc0851df056f3478", "tree": "c7494232c8d2bb840368c664be256b93bf6696fa", "parents": [ "47b724f3fe372a3d9acf0bb560fb5c93c9867880" ], "author": { "name": "Pavel Machek", "email": "pavel@ucw.cz", "time": "Thu Jul 07 17:56:45 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Jul 07 18:23:43 2005 -0700" }, "message": "[PATCH] pm: clean up process.c\n\nfreezeable() already tests for TRACED/STOPPED processes, no need to do it\ntwice.\n\nSigned-off-by: Pavel Machek \u003cpavel@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "3e1d1d28d99dabe63c64f7f40f1ca1d646de1f73", "tree": "d1e7c1e2e8902072042aefc3a7976b271cf76021", "parents": [ "b3e112bcc19abd8e9657dca34a87316786e096f3" ], "author": { "name": "Christoph Lameter", "email": "christoph@lameter.com", "time": "Fri Jun 24 23:13:50 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Jun 25 17:10:13 2005 -0700" }, "message": "[PATCH] Cleanup patch for process freezing\n\n1. Establish a simple API for process freezing defined in linux/include/sched.h:\n\n frozen(process)\t\tCheck for frozen process\n freezing(process)\t\tCheck if a process is being frozen\n freeze(process)\t\tTell a process to freeze (go to refrigerator)\n thaw_process(process)\tRestart process\n frozen_process(process)\tProcess is frozen now\n\n2. Remove all references to PF_FREEZE and PF_FROZEN from all\n kernel sources except sched.h\n\n3. Fix numerous locations where try_to_freeze is manually done by a driver\n\n4. Remove the argument that is no longer necessary from two function calls.\n\n5. Some whitespace cleanup\n\n6. Clear potential race in refrigerator (provides an open window of PF_FREEZE\n cleared before setting PF_FROZEN, recalc_sigpending does not check\n PF_FROZEN).\n\nThis patch does not address the problem of freeze_processes() violating the rule\nthat a task may only modify its own flags by setting PF_FREEZE. This is not clean\nin an SMP environment. freeze(process) is therefore not SMP safe!\n\nSigned-off-by: Christoph Lameter \u003cchristoph@lameter.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "tree": "0bba044c4ce775e45a88a51686b5d9f90697ea9d", "parents": [], "author": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Apr 16 15:20:36 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Apr 16 15:20:36 2005 -0700" }, "message": "Linux-2.6.12-rc2\n\nInitial git repository build. I\u0027m not bothering with the full history,\neven though we have it. We can create a separate \"historical\" git\narchive of that later if we want to, and in the meantime it\u0027s about\n3.2GB when imported into git - space that would just make the early\ngit days unnecessarily complicated, when we don\u0027t have a lot of good\ninfrastructure for it.\n\nLet it rip!\n" } ] }