)]}' { "log": [ { "commit": "6a103b0d44e9f97dc430002cf3ac7a7defa3819f", "tree": "c1e27fc70fcc1968b66f4a9cdb016898abcf5b5f", "parents": [ "f1b499f029c5dde85d46a8811353c62f29157541" ], "author": { "name": "John Kacur", "email": "jkacur@redhat.com", "time": "Thu Aug 05 17:10:54 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Aug 17 09:11:52 2010 +0200" }, "message": "lockup detector: Fix grammar by adding a missing \"to\" in the comments\n\nThis fixes a minor grammar problem in the comments in\nhung_task.c\n\nSigned-off-by: John Kacur \u003cjkacur@redhat.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1281021054-4228-2-git-send-email-jkacur@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "f1b499f029c5dde85d46a8811353c62f29157541", "tree": "50e49c147c77c39c52dc59dbd6a2a9c1e70793a7", "parents": [ "da5cabf80e2433131bf0ed8993abc0f7ea618c73" ], "author": { "name": "John Kacur", "email": "jkacur@redhat.com", "time": "Thu Aug 05 17:10:53 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Aug 17 09:11:10 2010 +0200" }, "message": "lockdep: Remove __debug_show_held_locks\n\nThere is no longer any functional difference between\n__debug_show_held_locks() and debug_show_held_locks(),\nso remove the former.\n\nSigned-off-by: John Kacur \u003cjkacur@redhat.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1281021054-4228-1-git-send-email-jkacur@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "e5af02261668350b43eb7381648930bde8e872f7", "tree": "cf8a99b24b8584c57f011f8dca157da971f6a139", "parents": [ "a8a8a669ea13d792296737505adc43ccacf3a648" ], "author": { "name": "Anton Blanchard", "email": "anton@samba.org", "time": "Fri Nov 27 13:28:20 2009 +1100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Nov 27 06:21:57 2009 +0100" }, "message": "softlockup: Fix hung_task_check_count sysctl\n\nI\u0027m seeing spikes of up to 0.5ms in khungtaskd on a large\nmachine. To reduce this source of jitter I tried setting\nhung_task_check_count to 0:\n\n # echo 0 \u003e /proc/sys/kernel/hung_task_check_count\n\nwhich didn\u0027t have the intended response. Change to a post\nincrement of max_count, so a value of 0 means check 0 tasks.\n\nSigned-off-by: Anton Blanchard \u003canton@samba.org\u003e\nAcked-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: msb@google.com\nLKML-Reference: \u003c20091127022820.GU32182@kryten\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8d65af789f3e2cf4cfbdbf71a0f7a61ebcd41d38", "tree": "121df3bfffc7853ac6d2c514ad514d4a748a0933", "parents": [ "c0d0787b6d47d9f4d5e8bd321921104e854a9135" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Wed Sep 23 15:57:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:21:04 2009 -0700" }, "message": "sysctl: remove \"struct file *\" argument of -\u003eproc_handler\n\nIt\u0027s unused.\n\nIt isn\u0027t needed -- read or write flag is already passed and sysctl\nshouldn\u0027t care about the rest.\n\nIt _was_ used in two places at arch/frv for some reason.\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cf2592f59c0e8ed4308adbdb2e0a88655379d579", "tree": "383b30bc13af8ce83e15825b041d8bb791ea4cea", "parents": [ "17406b82d621930cca8ccc1272cdac9a7dae8e40" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Tue Feb 10 16:52:37 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Feb 11 11:04:16 2009 +0100" }, "message": "softlockup: ensure the task has been switched out once\n\nWhen we check if a task has been switched out since the last scan, we might\nhave a race condition on the following scenario:\n\n- the task is freshly created and scheduled\n\n- it puts its state to TASK_UNINTERRUPTIBLE and is not yet switched out\n\n- check_hung_task() scans this task and will report a false positive because\n t-\u003envcsw + t-\u003enivcsw \u003d\u003d t-\u003elast_switch_count \u003d\u003d 0\n\nAdd a check for such cases.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Mandeep Singh Baines \u003cmsb@google.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "17406b82d621930cca8ccc1272cdac9a7dae8e40", "tree": "224c8b0b7c78a5467175fe10e116bdc6b73495ea", "parents": [ "94be52dc075a32af4aa73d7e10f68734d62d6af2" ], "author": { "name": "Mandeep Singh Baines", "email": "msb@google.com", "time": "Fri Feb 06 15:37:47 2009 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Feb 09 11:03:49 2009 +0100" }, "message": "softlockup: remove timestamp checking from hung_task\n\nImpact: saves sizeof(long) bytes per task_struct\n\nBy guaranteeing that sysctl_hung_task_timeout_secs have elapsed between\ntasklist scans we can avoid using timestamps.\n\nSigned-off-by: Mandeep Singh Baines \u003cmsb@google.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "94be52dc075a32af4aa73d7e10f68734d62d6af2", "tree": "70e4f2bf93dda15a27b79baf49bbfd3fc5982ba1", "parents": [ "ce9dbe244bf2063c41792e40dae7745957b118e0" ], "author": { "name": "Mandeep Singh Baines", "email": "msb@google.com", "time": "Thu Feb 05 09:56:08 2009 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Feb 05 19:55:31 2009 +0100" }, "message": "softlockup: convert read_lock in hung_task to rcu_read_lock\n\nSince the tasklist is protected by rcu list operations, it is safe\nto convert the read_lock()s to rcu_read_lock().\n\nSuggested-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Mandeep Singh Baines \u003cmsb@google.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "ce9dbe244bf2063c41792e40dae7745957b118e0", "tree": "a6278f5f012d2284aecbeb17bf5371d4864963d3", "parents": [ "5e54f5986a579b8445aa1d5ad3435c2cf7568bed" ], "author": { "name": "Mandeep Singh Baines", "email": "msb@google.com", "time": "Wed Feb 04 20:35:48 2009 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Feb 05 19:54:57 2009 +0100" }, "message": "softlockup: check all tasks in hung_task\n\nImpact: extend the scope of hung-task checks\n\nChanged the default value of hung_task_check_count to PID_MAX_LIMIT.\nhung_task_batch_count added to put an upper bound on the critical\nsection. Every hung_task_batch_count checks, the rcu lock is never\nheld for a too long time.\n\nKeeping the critical section small minimizes time preemption is disabled\nand keeps rcu grace periods small.\n\nTo prevent following a stale pointer, get_task_struct is called on g and t.\nTo verify that g and t have not been unhashed while outside the critical\nsection, the task states are checked.\n\nThe design was proposed by Frédéric Weisbecker.\n\nSigned-off-by: Mandeep Singh Baines \u003cmsb@google.com\u003e\nSuggested-by: Frédéric Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "603a148f434742fff08273207ffa44176cad13a1", "tree": "e0c051efd07a7b51390e13169f4c78a29c676fc1", "parents": [ "af432eb1cc3178ec7109aca2283aafb1c12ccac1" ], "author": { "name": "Mandeep Singh Baines", "email": "msb@google.com", "time": "Sat Jan 17 10:31:48 2009 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Jan 18 19:20:17 2009 +0100" }, "message": "softlockup: fix potential race in hung_task when resetting timeout\n\nImpact: fix potential false panic\n\nA potential race exists if sysctl_hung_task_timeout_secs is reset to 0\nwhile inside check_hung_uniterruptible_tasks(). If check_task() is\nentered, a comparison with 0 will result in a false hung_task being\ndetected.\n\nIf sysctl_hung_task_panic is set, the system will panic.\n\nSigned-off-by: Mandeep Singh Baines \u003cmsb@google.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "e162b39a368f0401e41b558f430c354d12a85b37", "tree": "3fb7e4d48f398d62e5074e7e3dd183cc54f59820", "parents": [ "c903ff837909ccada51243307d4239f86af40179" ], "author": { "name": "Mandeep Singh Baines", "email": "msb@google.com", "time": "Thu Jan 15 11:08:40 2009 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jan 16 14:06:04 2009 +0100" }, "message": "softlockup: decouple hung tasks check from softlockup detection\n\nDecoupling allows:\n\n* hung tasks check to happen at very low priority\n\n* hung tasks check and softlockup to be enabled/disabled independently\n at compile and/or run-time\n\n* individual panic settings to be enabled disabled independently\n at compile and/or run-time\n\n* softlockup threshold to be reduced without increasing hung tasks\n poll frequency (hung task check is expensive relative to softlock watchdog)\n\n* hung task check to be zero over-head when disabled at run-time\n\nSigned-off-by: Mandeep Singh Baines \u003cmsb@google.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" } ] }