)]}' { "log": [ { "commit": "46113830a18847cff8da73005e57bc49c2f95a56", "tree": "93946fc290d9481e7055217ff497583647d1e4d4", "parents": [ "094804c5a132f04c12dd4902ee15c64362e5c1af" ], "author": { "name": "Harald Welte", "email": "laforge@gnumonks.org", "time": "Mon Oct 10 19:44:29 2005 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Oct 10 16:16:33 2005 -0700" }, "message": "[PATCH] Fix signal sending in usbdevio on async URB completion\n\nIf a process issues an URB from userspace and (starts to) terminate\nbefore the URB comes back, we run into the issue described above. This\nis because the urb saves a pointer to \"current\" when it is posted to the\ndevice, but there\u0027s no guarantee that this pointer is still valid\nafterwards.\n\nIn fact, there are three separate issues:\n\n1) the pointer to \"current\" can become invalid, since the task could be\n completely gone when the URB completion comes back from the device.\n\n2) Even if the saved task pointer is still pointing to a valid task_struct,\n task_struct-\u003esighand could have gone meanwhile.\n\n3) Even if the process is perfectly fine, permissions may have changed,\n and we can no longer send it a signal.\n\nSo what we do instead, is to save the PID and uid\u0027s of the process, and\nintroduce a new kill_proc_info_as_uid() function.\n\nSigned-off-by: Harald Welte \u003claforge@gnumonks.org\u003e\n[ Fixed up types and added symbol exports ]\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "4a8342d233a39ee582e9f7260e12d2f5fd194a05", "tree": "cf0972e1deec828977794cc300597bb448535d4c", "parents": [ "aa55a08687059aa169d10a313c41f238c2070488" ], "author": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Sep 29 15:18:21 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Sep 29 15:18:21 2005 -0700" }, "message": "Revert task flag re-ordering, add comments\n\nRoland points out that the flags end up having non-obvious dependencies\nelsewhere, so revert aa55a08687059aa169d10a313c41f238c2070488 and add\nsome comments about why things are as they are.\n\nWe\u0027ll just have to fix up the broken comparisons. Roland has a patch.\n\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "aa55a08687059aa169d10a313c41f238c2070488", "tree": "9eaad6fc01e385778142b451a22bef99af9ecc68", "parents": [ "b20fd6508c565df04a6b5816f17e03b04d4f924d" ], "author": { "name": "Oleg Nesterov", "email": "oleg@tv-sign.ru", "time": "Thu Sep 29 19:58:53 2005 +0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Sep 29 09:05:52 2005 -0700" }, "message": "[PATCH] fix TASK_STOPPED vs TASK_NONINTERACTIVE interaction\n\ndo_signal_stop:\n\n\tfor_each_thread(t) {\n\t\tif (t-\u003estate \u003c TASK_STOPPED)\n\t\t\t++sig-\u003egroup_stop_count;\n\t}\n\nHowever, TASK_NONINTERACTIVE \u003e TASK_STOPPED, so this loop will not\ncount TASK_INTERRUPTIBLE | TASK_NONINTERACTIVE threads.\n\nSee also wait_task_stopped(), which checks -\u003estate \u003e TASK_STOPPED.\n\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\n\n[ We really probably should always use the appropriate bitmasks to test\n task states, not do it like this. Using something like\n\n\t#define TASK_RUNNABLE (TASK_RUNNING | TASK_INTERRUPTIBLE | \\\n\t\t\t\tTASK_UNINTERRUPTIBLE | TASK_NONINTERACTIVE)\n\n and then doing \"if (task-\u003estate \u0026 TASK_RUNNABLE)\" or similar. But the\n ordering of the task states is historical, and keeping the ordering\n does make sense regardless. ]\n\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "498d0c5711094b0e1fd93f5355d270ccebdec706", "tree": "e155f09b6f5b752171638028e574947e275cc3d9", "parents": [ "921717a2a1cde78c9b2aa971c16510d63efe7320" ], "author": { "name": "Andrew Morton", "email": "akpm@osdl.org", "time": "Tue Sep 13 01:25:14 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Sep 13 08:22:29 2005 -0700" }, "message": "[PATCH] set_current_state() commentary\n\nExplain the mysteries of set_current_state().\n\nQuoth Linus:\n\n The scheduler itself never needs the memory barrier at all.\n\n The barrier is needed only if the user itself ends up testing some other\n thing afterwards, ie if you have\n\n \tset_process_state(TASK_INTERRUPTIBLE);\n \tif (still_need_to_sleep())\n \t\tschedule();\n\n then the \"still_need_to_sleep()\" thing may test flags and wakeup events,\n and then you _may_ want to (and often do) make sure that the write of\n TASK_INTERRUPTIBLE is serialized wrt the reads of any wakeup data (since\n the wakeup may have happened on another CPU).\n\n So the comment is somewhat wrong. We don\u0027t really _care_ whether the state\n propagates out to other CPU\u0027s since all of our actions are purely local,\n and there is nothing we do that is conditional on any other CPU: we\u0027re\n going to sleep unconditionally, and the scheduler only cares about _our_\n state, not about somebody elses state.\n\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "b3426599af9524104be6938bcb1fcaab314781c7", "tree": "c6d354bddb5b8cd298d139b60a9257ebd8323b90", "parents": [ "f24ec7f6c6278c0ea4c00efe96d50b1e66796c44" ], "author": { "name": "Paul Jackson", "email": "pj@sgi.com", "time": "Mon Sep 12 04:30:30 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Sep 12 09:16:27 2005 -0700" }, "message": "[PATCH] cpuset semaphore depth check optimize\n\nOptimize the deadlock avoidance check on the global cpuset\nsemaphore cpuset_sem. Instead of adding a depth counter to the\ntask struct of each task, rather just two words are enough, one\nto store the depth and the other the current cpuset_sem holder.\n\nThanks to Nikita Danilov for the idea.\n\nSigned-off-by: Paul Jackson \u003cpj@sgi.com\u003e\n\n[ We may want to change this further, but at least it\u0027s now\n a totally internal decision to the cpusets code ]\n\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a2a979821b6ab75a4f143cfaa1c4672cc259ec10", "tree": "4e327a4a8c14829d4addf8a09e13355e0cf565a4", "parents": [ "9fe66dfd8846706ff11ed7990d06c92644973bd8" ], "author": { "name": "Keith Owens", "email": "kaos@sgi.com", "time": "Sun Sep 11 17:19:06 2005 +1000" }, "committer": { "name": "Tony Luck", "email": "tony.luck@intel.com", "time": "Sun Sep 11 14:01:30 2005 -0700" }, "message": "[PATCH] MCA/INIT: scheduler hooks\n\nScheduler hooks to see/change which process is deemed to be on a cpu.\n\nSigned-off-by: Keith Owens \u003ckaos@sgi.com\u003e\nSigned-off-by: Tony Luck \u003ctony.luck@intel.com\u003e\n" }, { "commit": "64ed93a268bc18fa6f72f61420d0e0022c5e38d1", "tree": "1332ce542510b88014767f3536d9150710a2f3f9", "parents": [ "672289e9faa56acd4e39ad866ea258b7be7c99a6" ], "author": { "name": "Nishanth Aravamudan", "email": "nacc@us.ibm.com", "time": "Sat Sep 10 00:27:21 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Sep 10 10:06:36 2005 -0700" }, "message": "[PATCH] add schedule_timeout_{,un}interruptible() interfaces\n\nAdd schedule_timeout_{,un}interruptible() interfaces so that\nschedule_timeout() callers don\u0027t have to worry about forgetting to add the\nset_current_state() call beforehand.\n\nSigned-off-by: Nishanth Aravamudan \u003cnacc@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "d79fc0fc6645b0cf5cd980da76942ca6d6300fa4", "tree": "e74aca1df1d37dbd7af66636a4e39a3f7e1af479", "parents": [ "95cdf3b799a481969a48d69a1a52916ad5da6694" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Sep 10 00:26:12 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Sep 10 10:06:22 2005 -0700" }, "message": "[PATCH] sched: TASK_NONINTERACTIVE\n\nThis patch implements a task state bit (TASK_NONINTERACTIVE), which can be\nused by blocking points to mark the task\u0027s wait as \"non-interactive\". This\ndoes not mean the task will be considered a CPU-hog - the wait will simply\nnot have an effect on the waiting task\u0027s priority - positive or negative\nalike. Right now only pipe_wait() will make use of it, because it\u0027s a\ncommon source of not-so-interactive waits (kernel compilation jobs, etc.).\n\nSigned-off-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": "4247bdc60048018b98f71228b45cfbc5f5270c86", "tree": "6f6abbd10685af84c97e661da6771726a12209ac", "parents": [ "fb1c8f93d869b34cacb8b8932e2b83d96a19d720" ], "author": { "name": "Paul Jackson", "email": "pj@sgi.com", "time": "Sat Sep 10 00:26:06 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Sep 10 10:06:21 2005 -0700" }, "message": "[PATCH] cpuset semaphore depth check deadlock fix\n\nThe cpusets-formalize-intermediate-gfp_kernel-containment patch\nhas a deadlock problem.\n\nThis patch was part of a set of four patches to make more\nextensive use of the cpuset \u0027mem_exclusive\u0027 attribute to\nmanage kernel GFP_KERNEL memory allocations and to constrain\nthe out-of-memory (oom) killer.\n\nA task that is changing cpusets in particular ways on a system\nwhen it is very short of free memory could double trip over\nthe global cpuset_sem semaphore (get the lock and then deadlock\ntrying to get it again).\n\nThe second attempt to get cpuset_sem would be in the routine\ncpuset_zone_allowed(). This was discovered by code inspection.\nI can not reproduce the problem except with an artifically\nhacked kernel and a specialized stress test.\n\nIn real life you cannot hit this unless you are manipulating\ncpusets, and are very unlikely to hit it unless you are rapidly\nmodifying cpusets on a memory tight system. Even then it would\nbe a rare occurence.\n\nIf you did hit it, the task double tripping over cpuset_sem\nwould deadlock in the kernel, and any other task also trying\nto manipulate cpusets would deadlock there too, on cpuset_sem.\nYour batch manager would be wedged solid (if it was cpuset\nsavvy), but classic Unix shells and utilities would work well\nenough to reboot the system.\n\nThe unusual condition that led to this bug is that unlike most\nsemaphores, cpuset_sem _can_ be acquired while in the page\nallocation code, when __alloc_pages() calls cpuset_zone_allowed.\nSo it easy to mistakenly perform the following sequence:\n 1) task makes system call to alter a cpuset\n 2) take cpuset_sem\n 3) try to allocate memory\n 4) memory allocator, via cpuset_zone_allowed, trys to take cpuset_sem\n 5) deadlock\n\nThe reason that this is not a serious bug for most users\nis that almost all calls to allocate memory don\u0027t require\ntaking cpuset_sem. Only some code paths off the beaten\ntrack require taking cpuset_sem -- which is good. Taking\na global semaphore on the main code path for allocating\nmemory would not scale well.\n\nThis patch fixes this deadlock by wrapping the up() and down()\ncalls on cpuset_sem in kernel/cpuset.c with code that tracks\nthe nesting depth of the current task on that semaphore, and\nonly does the real down() if the task doesn\u0027t hold the lock\nalready, and only does the real up() if the nesting depth\n(number of unmatched downs) is exactly one.\n\nThe previous required use of refresh_mems(), anytime that\nthe cpuset_sem semaphore was acquired and the code executed\nwhile holding that semaphore might try to allocate memory, is\nno longer required. Two refresh_mems() calls were removed\nthanks to this. This is a good change, as failing to get\nall the necessary refresh_mems() calls placed was a primary\nsource of bugs in this cpuset code. The only remaining call\nto refresh_mems() is made while doing a memory allocation,\nif certain task memory placement data needs to be updated\nfrom its cpuset, due to the cpuset having been changed behind\nthe tasks back.\n\nSigned-off-by: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "383f2835eb9afb723af71850037b2f074ac9db60", "tree": "1ef99fd4d7246b2afa16dc7d1514b6ff25fa8284", "parents": [ "b0d62e6d5b3318b6b722121d945afa295f7201b5" ], "author": { "name": "Chen, Kenneth W", "email": "kenneth.w.chen@intel.com", "time": "Fri Sep 09 13:02:02 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Sep 09 13:57:31 2005 -0700" }, "message": "[PATCH] Prefetch kernel stacks to speed up context switch\n\nFor architecture like ia64, the switch stack structure is fairly large\n(currently 528 bytes). For context switch intensive application, we found\nthat significant amount of cache misses occurs in switch_to() function.\nThe following patch adds a hook in the schedule() function to prefetch\nswitch stack structure as soon as \u0027next\u0027 task is determined. This allows\nmaximum overlap in prefetch cache lines for that structure.\n\nSigned-off-by: Ken Chen \u003ckenneth.w.chen@intel.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "9c1cfda20a508b181bdda8c0045f7c0c333880a5", "tree": "eaa5b7ef7407316c36def26169574d0e37b1e60a", "parents": [ "ef08e3b4981aebf2ba9bd7025ef7210e8eec07ce" ], "author": { "name": "John Hawkes", "email": "hawkes@sgi.com", "time": "Tue Sep 06 15:18:14 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Sep 07 16:57:40 2005 -0700" }, "message": "[PATCH] cpusets: Move the ia64 domain setup code to the generic code\n\nSigned-off-by: John Hawkes \u003chawkes@sgi.com\u003e\nSigned-off-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": "36d57ac4a818cb4aa3edbdf63ad2ebc31106f925", "tree": "445eda00ee5974a65e21152cd240fb604c6d112d", "parents": [ "32605a18152b246df483fadc1c23854addde8755" ], "author": { "name": "H. J. Lu", "email": "hjl@lucon.org", "time": "Tue Sep 06 15:16:49 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Sep 07 16:57:21 2005 -0700" }, "message": "[PATCH] auxiliary vector cleanups\n\nThe size of auxiliary vector is fixed at 42 in linux/sched.h. But it isn\u0027t\nvery obvious when looking at linux/elf.h. This patch adds AT_VECTOR_SIZE\nso that we can change it if necessary when a new vector is added.\n\nBecause of include file ordering problems, doing this necessitated the\nextraction of the AT_* symbols into a standalone header file.\n\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "8446f1d391f3d27e6bf9c43d4cbcdac0ca720417", "tree": "738853af877c9a391b4f2db467e7f90c6e2e38ed", "parents": [ "4732efbeb997189d9f9b04708dc26bf8613ed721" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Sep 06 15:16:27 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Sep 07 16:57:17 2005 -0700" }, "message": "[PATCH] detect soft lockups\n\nThis patch adds a new kernel debug feature: CONFIG_DETECT_SOFTLOCKUP.\n\nWhen enabled then per-CPU watchdog threads are started, which try to run\nonce per second. If they get delayed for more than 10 seconds then a\ncallback from the timer interrupt detects this condition and prints out a\nwarning message and a stack dump (once per lockup incident). The feature\nis otherwise non-intrusive, it doesnt try to unlock the box in any way, it\nonly gets the debug info out, automatically, and on all CPUs affected by\nthe lockup.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Nishanth Aravamudan \u003cnacc@us.ibm.com\u003e\nSigned-Off-By: Matthias Urlichs \u003csmurf@smurf.noris.de\u003e\nSigned-off-by: Richard Purdie \u003crpurdie@rpsys.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "0eeca28300df110bd6ed54b31193c83b87921443", "tree": "7db42d8a18d80eca538f5b7d25e0532b8fa38b85", "parents": [ "bd4c625c061c2a38568d0add3478f59172455159" ], "author": { "name": "Robert Love", "email": "rml@novell.com", "time": "Tue Jul 12 17:06:03 2005 -0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Jul 12 20:38:38 2005 -0700" }, "message": "[PATCH] inotify\n\ninotify is intended to correct the deficiencies of dnotify, particularly\nits inability to scale and its terrible user interface:\n\n * dnotify requires the opening of one fd per each directory\n that you intend to watch. This quickly results in too many\n open files and pins removable media, preventing unmount.\n * dnotify is directory-based. You only learn about changes to\n directories. Sure, a change to a file in a directory affects\n the directory, but you are then forced to keep a cache of\n stat structures.\n * dnotify\u0027s interface to user-space is awful. Signals?\n\ninotify provides a more usable, simple, powerful solution to file change\nnotification:\n\n * inotify\u0027s interface is a system call that returns a fd, not SIGIO.\n\t You get a single fd, which is select()-able.\n * inotify has an event that says \"the filesystem that the item\n you were watching is on was unmounted.\"\n * inotify can watch directories or files.\n\nInotify is currently used by Beagle (a desktop search infrastructure),\nGamin (a FAM replacement), and other projects.\n\nSee Documentation/filesystems/inotify.txt.\n\nSigned-off-by: Robert Love \u003crml@novell.com\u003e\nCc: John McCutchan \u003cttb@tentacle.dhs.org\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "22e2c507c301c3dbbcf91b4948b88f78842ee6c9", "tree": "9a97c91d1362e69703aa286021daffb8a5456f4c", "parents": [ "020f46a39eb7b99a575b9f4d105fce2b142acdf1" ], "author": { "name": "Jens Axboe", "email": "axboe@suse.de", "time": "Mon Jun 27 10:55:12 2005 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Mon Jun 27 14:33:29 2005 -0700" }, "message": "[PATCH] Update cfq io scheduler to time sliced design\n\nThis updates the CFQ io scheduler to the new time sliced design (cfq\nv3). It provides full process fairness, while giving excellent\naggregate system throughput even for many competing processes. It\nsupports io priorities, either inherited from the cpu nice value or set\ndirectly with the ioprio_get/set syscalls. The latter closely mimic\nset/getpriority.\n\nThis import is based on my latest from -mm.\n\nSigned-off-by: Jens Axboe \u003caxboe@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "2031d0f586839bc68f35bcf8580b18947f8491d4", "tree": "e317615b4cb62350edeea0afe0a4fc94152cee29", "parents": [ "98e7f29418a4931f97e6b78d1ef3a47103fe6cd5", "3e1d1d28d99dabe63c64f7f40f1ca1d646de1f73" ], "author": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Jun 25 17:16:53 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Jun 25 17:16:53 2005 -0700" }, "message": "Merge Christoph\u0027s freeze cleanup patch\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": "1a20ff27ef75d866730ee796acd811a925af762f", "tree": "a9e6acd72db03cfec5fdaee8cfab231032216581", "parents": [ "37e4ab3f0cba13adf3535d373fd98e5ee47b5410" ], "author": { "name": "Dinakar Guniguntala", "email": "dino@in.ibm.com", "time": "Sat Jun 25 14:57:33 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Jun 25 16:24:45 2005 -0700" }, "message": "[PATCH] Dynamic sched domains: sched changes\n\nThe following patches add dynamic sched domains functionality that was\nextensively discussed on lkml and lse-tech. I would like to see this added to\n-mm\n\no The main advantage with this feature is that it ensures that the scheduler\n load balacing code only balances against the cpus that are in the sched\n domain as defined by an exclusive cpuset and not all of the cpus in the\n system. This removes any overhead due to load balancing code trying to\n pull tasks outside of the cpu exclusive cpuset only to be prevented by\n the tasks\u0027 cpus_allowed mask.\no cpu exclusive cpusets are useful for servers running orthogonal\n workloads such as RT applications requiring low latency and HPC\n applications that are throughput sensitive\n\no It provides a new API partition_sched_domains in sched.c\n that makes dynamic sched domains possible.\no cpu_exclusive cpusets sets are now associated with a sched domain.\n Which means that the users can dynamically modify the sched domains\n through the cpuset file system interface\no ia64 sched domain code has been updated to support this feature as well\no Currently, this does not support hotplug. (However some of my tests\n indicate hotplug+preempt is currently broken)\no I have tested it extensively on x86.\no This should have very minimal impact on performance as none of\n the fast paths are affected\n\nSigned-off-by: Dinakar Guniguntala \u003cdino@in.ibm.com\u003e\nAcked-by: Paul Jackson \u003cpj@sgi.com\u003e\nAcked-by: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nAcked-by: Matthew Dobson \u003ccolpatch@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "476d139c218e44e045e4bc6d4cc02b010b343939", "tree": "82a6537b829b2b35156fba5a312f4e44273a4356", "parents": [ "674311d5b411e9042df4fdf7aef0b3c8217b6240" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sat Jun 25 14:57:29 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Jun 25 16:24:44 2005 -0700" }, "message": "[PATCH] sched: consolidate sbe sbf\n\nConsolidate balance-on-exec with balance-on-fork. This is made easy by the\nsched-domains RCU patches.\n\nAs well as the general goodness of code reduction, this allows the runqueues\nto be unlocked during balance-on-fork.\n\nschedstats is a problem. Maybe just have balance-on-event instead of\ndistinguishing fork and exec?\n\nSigned-off-by: Nick Piggin \u003cnickpiggin@yahoo.com.au\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": "4866cde064afbb6c2a488c265e696879de616daa", "tree": "6effad1ab6271129fc607b98273086409876563a", "parents": [ "48c08d3f8ff94fa118187e4d8d4a5707bb85e59d" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sat Jun 25 14:57:23 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Jun 25 16:24:43 2005 -0700" }, "message": "[PATCH] sched: cleanup context switch locking\n\nInstead of requiring architecture code to interact with the scheduler\u0027s\nlocking implementation, provide a couple of defines that can be used by the\narchitecture to request runqueue unlocked context switches, and ask for\ninterrupts to be enabled over the context switch.\n\nAlso replaces the \"switch_lock\" used by these architectures with an oncpu\nflag (note, not a potentially slow bitflag). This eliminates one bus\nlocked memory operation when context switching, and simplifies the\ntask_running function.\n\nSigned-off-by: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "68767a0ae428801649d510d9a65bb71feed44dd1", "tree": "678e2daa5726acf46ffd00a337d931e08ab928f9", "parents": [ "147cbb4bbe991452698f0772d8292f22825710ba" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sat Jun 25 14:57:20 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Jun 25 16:24:42 2005 -0700" }, "message": "[PATCH] sched: schedstats update for balance on fork\n\nAdd SCHEDSTAT statistics for sched-balance-fork.\n\nSigned-off-by: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "147cbb4bbe991452698f0772d8292f22825710ba", "tree": "cb86550d7e440e7dfbe22b0af6d2cfc991cb76cf", "parents": [ "cafb20c1f9976a70d633bb1e1c8c24eab00e4e80" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sat Jun 25 14:57:19 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Jun 25 16:24:42 2005 -0700" }, "message": "[PATCH] sched: balance on fork\n\nReimplement the balance on exec balancing to be sched-domains aware. Use this\nto also do balance on fork balancing. Make x86_64 do balance on fork over the\nNUMA domain.\n\nThe problem that the non sched domains aware blancing became apparent on dual\ncore, multi socket opterons. What we want is for the new tasks to be sent to\na different socket, but more often than not, we would first load up our\nsibling core, or fill two cores of a single remote socket before selecting a\nnew one.\n\nThis gives large improvements to STREAM on such systems.\n\nSigned-off-by: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "7897986bad8f6cd50d6149345aca7f6480f49464", "tree": "10a5e08e004ae685aaab6823a3774803455b7704", "parents": [ "99b61ccf0bf0e9a85823d39a5db6a1519caeb13d" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sat Jun 25 14:57:13 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Jun 25 16:24:41 2005 -0700" }, "message": "[PATCH] sched: balance timers\n\nDo CPU load averaging over a number of different intervals. Allow each\ninterval to be chosen by sending a parameter to source_load and target_load.\n0 is instantaneous, idx \u003e 0 returns a decaying average with the most recent\nsample weighted at 2^(idx-1). To a maximum of 3 (could be easily increased).\n\nSo generally a higher number will result in more conservative balancing.\n\nSigned-off-by: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "3e30148c3d524a9c1c63ca28261bc24c457eb07a", "tree": "a2fcc46cc11fe871ad976c07476d934a07313576", "parents": [ "8589b4e00e352f983259140f25a262d973be6bc5" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Thu Jun 23 22:00:56 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Fri Jun 24 00:05:19 2005 -0700" }, "message": "[PATCH] Keys: Make request-key create an authorisation key\n\nThe attached patch makes the following changes:\n\n (1) There\u0027s a new special key type called \".request_key_auth\".\n\n This is an authorisation key for when one process requests a key and\n another process is started to construct it. This type of key cannot be\n created by the user; nor can it be requested by kernel services.\n\n Authorisation keys hold two references:\n\n (a) Each refers to a key being constructed. When the key being\n \t constructed is instantiated the authorisation key is revoked,\n \t rendering it of no further use.\n\n (b) The \"authorising process\". This is either:\n\n \t (i) the process that called request_key(), or:\n\n \t (ii) if the process that called request_key() itself had an\n \t authorisation key in its session keyring, then the authorising\n \t process referred to by that authorisation key will also be\n \t referred to by the new authorisation key.\n\n\t This means that the process that initiated a chain of key requests\n\t will authorise the lot of them, and will, by default, wind up with\n\t the keys obtained from them in its keyrings.\n\n (2) request_key() creates an authorisation key which is then passed to\n /sbin/request-key in as part of a new session keyring.\n\n (3) When request_key() is searching for a key to hand back to the caller, if\n it comes across an authorisation key in the session keyring of the\n calling process, it will also search the keyrings of the process\n specified therein and it will use the specified process\u0027s credentials\n (fsuid, fsgid, groups) to do that rather than the calling process\u0027s\n credentials.\n\n This allows a process started by /sbin/request-key to find keys belonging\n to the authorising process.\n\n (4) A key can be read, even if the process executing KEYCTL_READ doesn\u0027t have\n direct read or search permission if that key is contained within the\n keyrings of a process specified by an authorisation key found within the\n calling process\u0027s session keyring, and is searchable using the\n credentials of the authorising process.\n\n This allows a process started by /sbin/request-key to read keys belonging\n to the authorising process.\n\n (5) The magic KEY_SPEC_*_KEYRING key IDs when passed to KEYCTL_INSTANTIATE or\n KEYCTL_NEGATE will specify a keyring of the authorising process, rather\n than the process doing the instantiation.\n\n (6) One of the process keyrings can be nominated as the default to which\n request_key() should attach new keys if not otherwise specified. This is\n done with KEYCTL_SET_REQKEY_KEYRING and one of the KEY_REQKEY_DEFL_*\n constants. The current setting can also be read using this call.\n\n (7) request_key() is partially interruptible. If it is waiting for another\n process to finish constructing a key, it can be interrupted. This permits\n a request-key cycle to be broken without recourse to rebooting.\n\nSigned-Off-By: David Howells \u003cdhowells@redhat.com\u003e\nSigned-Off-By: Benoit Boissinot \u003cbenoit.boissinot@ens-lyon.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "d6e711448137ca3301512cec41a2c2ce852b3d0a", "tree": "f0765ebd90fdbdf270c05fcd7f3d32b24ba56681", "parents": [ "8b0914ea7475615c7c8965c1ac8fe4069270f25c" ], "author": { "name": "Alan Cox", "email": "alan@lxorguk.ukuu.org.uk", "time": "Thu Jun 23 00:09:43 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:26 2005 -0700" }, "message": "[PATCH] setuid core dump\n\nAdd a new `suid_dumpable\u0027 sysctl:\n\nThis value can be used to query and set the core dump mode for setuid\nor otherwise protected/tainted binaries. The modes are\n\n0 - (default) - traditional behaviour. Any process which has changed\n privilege levels or is execute only will not be dumped\n\n1 - (debug) - all processes dump core when possible. The core dump is\n owned by the current user and no security is applied. This is intended\n for system debugging situations only. Ptrace is unchecked.\n\n2 - (suidsafe) - any binary which normally would not be dumped is dumped\n readable by root only. This allows the end user to remove such a dump but\n not access it directly. For security reasons core dumps in this mode will\n not overwrite one another or other files. This mode is appropriate when\n adminstrators are attempting to debug problems in a normal environment.\n\n(akpm:\n\n\u003e \u003e +EXPORT_SYMBOL(suid_dumpable);\n\u003e\n\u003e EXPORT_SYMBOL_GPL?\n\nNo problem to me.\n\n\u003e \u003e \tif (current-\u003eeuid \u003d\u003d current-\u003euid \u0026\u0026 current-\u003eegid \u003d\u003d current-\u003egid)\n\u003e \u003e \t\tcurrent-\u003emm-\u003edumpable \u003d 1;\n\u003e\n\u003e Should this be SUID_DUMP_USER?\n\nActually the feedback I had from last time was that the SUID_ defines\nshould go because its clearer to follow the numbers. They can go\neverywhere (and there are lots of places where dumpable is tested/used\nas a bool in untouched code)\n\n\u003e Maybe this should be renamed to `dump_policy\u0027 or something. Doing that\n\u003e would help us catch any code which isn\u0027t using the #defines, too.\n\nFair comment. The patch was designed to be easy to maintain for Red Hat\nrather than for merging. Changing that field would create a gigantic\ndiff because it is used all over the place.\n\n)\n\nSigned-off-by: Alan Cox \u003calan@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "1363c3cd8603a913a27e2995dccbd70d5312d8e6", "tree": "405e7fc1ef44678f3ca0a54c536d0457e6e80f45", "parents": [ "e7c8d5c9955a4d2e88e36b640563f5d6d5aba48a" ], "author": { "name": "Wolfgang Wander", "email": "wwc@rentec.com", "time": "Tue Jun 21 17:14:49 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Tue Jun 21 18:46:16 2005 -0700" }, "message": "[PATCH] Avoiding mmap fragmentation\n\nIngo recently introduced a great speedup for allocating new mmaps using the\nfree_area_cache pointer which boosts the specweb SSL benchmark by 4-5% and\ncauses huge performance increases in thread creation.\n\nThe downside of this patch is that it does lead to fragmentation in the\nmmap-ed areas (visible via /proc/self/maps), such that some applications\nthat work fine under 2.4 kernels quickly run out of memory on any 2.6\nkernel.\n\nThe problem is twofold:\n\n 1) the free_area_cache is used to continue a search for memory where\n the last search ended. Before the change new areas were always\n searched from the base address on.\n\n So now new small areas are cluttering holes of all sizes\n throughout the whole mmap-able region whereas before small holes\n tended to close holes near the base leaving holes far from the base\n large and available for larger requests.\n\n 2) the free_area_cache also is set to the location of the last\n munmap-ed area so in scenarios where we allocate e.g. five regions of\n 1K each, then free regions 4 2 3 in this order the next request for 1K\n will be placed in the position of the old region 3, whereas before we\n appended it to the still active region 1, placing it at the location\n of the old region 2. Before we had 1 free region of 2K, now we only\n get two free regions of 1K -\u003e fragmentation.\n\nThe patch addresses thes issues by introducing yet another cache descriptor\ncached_hole_size that contains the largest known hole size below the\ncurrent free_area_cache. If a new request comes in the size is compared\nagainst the cached_hole_size and if the request can be filled with a hole\nbelow free_area_cache the search is started from the base instead.\n\nThe results look promising: Whereas 2.6.12-rc4 fragments quickly and my\n(earlier posted) leakme.c test program terminates after 50000+ iterations\nwith 96 distinct and fragmented maps in /proc/self/maps it performs nicely\n(as expected) with thread creation, Ingo\u0027s test_str02 with 20000 threads\nrequires 0.7s system time.\n\nTaking out Ingo\u0027s patch (un-patch available per request) by basically\ndeleting all mentions of free_area_cache from the kernel and starting the\nsearch for new memory always at the respective bases we observe: leakme\nterminates successfully with 11 distinctive hardly fragmented areas in\n/proc/self/maps but thread creating is gringdingly slow: 30+s(!) system\ntime for Ingo\u0027s test_str02 with 20000 threads.\n\nNow - drumroll ;-) the appended patch works fine with leakme: it ends with\nonly 7 distinct areas in /proc/self/maps and also thread creation seems\nsufficiently fast with 0.71s for 20000 threads.\n\nSigned-off-by: Wolfgang Wander \u003cwwc@rentec.com\u003e\nCredit-to: \"Richard Purdie\" \u003crpurdie@rpsys.net\u003e\nSigned-off-by: Ken Chen \u003ckenneth.w.chen@intel.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e (partly)\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "3677209239ed71d2654e73eecfab1dbec2af11a9", "tree": "125d9d7553c5f6dc6ad030e4c829a5bf71ab3ef5", "parents": [ "291c4a75ce7632ee5c565359fb875ba0597f76be" ], "author": { "name": "Paolo \u0027Blaisorblade\u0027 Giarrusso", "email": "blaisorblade@yahoo.it", "time": "Thu May 05 16:16:12 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu May 05 16:36:48 2005 -0700" }, "message": "[PATCH] comments on locking of task-\u003ecomm\n\nAdd some comments about task-\u003ecomm, to explain what it is near its definition\nand provide some important pointers to its uses.\n\nSigned-off-by: Paolo \u0027Blaisorblade\u0027 Giarrusso \u003cblaisorblade@yahoo.it\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "408b664a7d394a5e4315fbd14aca49b042cb2b08", "tree": "bd3ebe72229227962d157e46e61ed65b78d6e28b", "parents": [ "c31403a1f5a761599df38bcc2d6ba94f24320c33" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Sun May 01 08:59:29 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sun May 01 08:59:29 2005 -0700" }, "message": "[PATCH] make lots of things static\n\nAnother large rollup of various patches from Adrian which make things static\nwhere they were needlessly exported.\n\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "e43379f10b42194b8a6e1de342cfb44463c0f6da", "tree": "bf6463200dc7e14f266b7f12807c7cbfbb6700c2", "parents": [ "9fc1427a01a9df3605e219c6de0c59c4639209a1" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Sun May 01 08:59:00 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sun May 01 08:59:00 2005 -0700" }, "message": "[PATCH] nice and rt-prio rlimits\n\nAdd a pair of rlimits for allowing non-root tasks to raise nice and rt\npriorities. Defaults to traditional behavior. Originally written by\nChris Wright.\n\nThe patch implements a simple rlimit ceiling for the RT (and nice) priorities\na task can set. The rlimit defaults to 0, meaning no change in behavior by\ndefault. A value of 50 means RT priority levels 1-50 are allowed. A value of\n100 means all 99 privilege levels from 1 to 99 are allowed. CAP_SYS_NICE is\nblanket permission.\n\n(akpm: see http://www.uwsg.iu.edu/hypermail/linux/kernel/0503.1/1921.html for\ntips on integrating this with PAM).\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\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": "6c46ada700568897165409e618ed584683838b49", "tree": "3e58ca796d70c7867bb2acd6fbe239f671decd78", "parents": [ "2f4cfacecd522849dac254f87273525eeca33d1d" ], "author": { "name": "Coywolf Qi Hunt", "email": "coywolf@lovecn.org", "time": "Sat Apr 16 15:26:01 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Apr 16 15:26:01 2005 -0700" }, "message": "[PATCH] reparent_to_init cleanup\n\nThis patch hides reparent_to_init(). reparent_to_init() should only be\ncalled by daemonize().\n\nSigned-off-by: Coywolf Qi Hunt \u003ccoywolf@lovecn.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\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" } ] }