)]}' { "log": [ { "commit": "d9f1bb6ad7fc53c406706f47858dd5ff030b14a3", "tree": "4af519d68b396e372e6a5afbb5e968de3bacd123", "parents": [ "056ba4a9bea5f32781a36b797c562fb731e5eaa6" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Feb 25 14:06:47 2010 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Feb 26 08:20:46 2010 +0100" }, "message": "rcu: Make rcu_read_lock_sched_held() take boot time into account\n\nBefore the scheduler starts, all tasks are non-preemptible by\ndefinition. So, during that time, rcu_read_lock_sched_held()\nneeds to always return \"true\". This patch makes that be so.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: mathieu.desnoyers@polymtl.ca\nCc: josh@joshtriplett.org\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nCc: Valdis.Kletnieks@vt.edu\nCc: dhowells@redhat.com\nLKML-Reference: \u003c1267135607-7056-2-git-send-email-paulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "bf66f18e79e34c421bbd8f6511e2c556b779df2f", "tree": "2348e3bc8392addf7959fbe94003f7e0da2a1c8b", "parents": [ "46a1e34eda805501a8b32f26394faa435149f6d1" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon Jan 04 15:09:10 2010 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jan 13 09:06:05 2010 +0100" }, "message": "rcu: Add force_quiescent_state() testing to rcutorture\n\nAdd force_quiescent_state() testing to rcutorture, with a\nseparate thread that repeatedly invokes force_quiescent_state()\nin bursts. This can greatly increase the probability of\nencountering certain types of race conditions.\n\nSuggested-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: mathieu.desnoyers@polymtl.ca\nCc: josh@joshtriplett.org\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nCc: Valdis.Kletnieks@vt.edu\nCc: dhowells@redhat.com\nLKML-Reference: \u003c1262646551116-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "234da7bcdc7aaa935846534c3b726dbc79a9cdd5", "tree": "a391afd465d6493a9f1bb274c225bab4d303aad0", "parents": [ "416eb39556a03d1c7e52b0791e9052ccd71db241" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Wed Dec 16 20:21:05 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Dec 17 09:46:44 2009 +0100" }, "message": "sched: Teach might_sleep() about preemptible RCU\n\nIn practice, it is harmless to voluntarily sleep in a\nrcu_read_lock() section if we are running under preempt rcu, but\nit is illegal if we build a kernel running non-preemptable rcu.\n\nCurrently, might_sleep() doesn\u0027t notice sleepable operations\nunder rcu_read_lock() sections if we are running under\npreemptable rcu because preempt_count() is left untouched after\nrcu_read_lock() in this case. But we want developers who test\ntheir changes under such config to notice the \"sleeping while\natomic\" issues.\n\nSo we add rcu_read_lock_nesting to prempt_count() in\nmight_sleep() checks.\n\n[ v2: Handle rcu-tiny ]\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nReviewed-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLKML-Reference: \u003c1260991265-8451-1-git-send-regression-fweisbec@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "6ebb237bece23275d1da149b61a342f0d4d06a08", "tree": "5f3d99f6ce2e1e98736e5708eecb5bf217f78fde", "parents": [ "9f680ab41485edfdc96331b70afa7513aa0a7720" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Nov 22 08:53:50 2009 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Nov 22 18:58:16 2009 +0100" }, "message": "rcu: Re-arrange code to reduce #ifdef pain\n\nRemove #ifdefs from kernel/rcupdate.c and\ninclude/linux/rcupdate.h by moving code to\ninclude/linux/rcutiny.h, include/linux/rcutree.h, and\nkernel/rcutree.c.\n\nAlso remove some definitions that are no longer used.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: mathieu.desnoyers@polymtl.ca\nCc: josh@joshtriplett.org\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nCc: Valdis.Kletnieks@vt.edu\nCc: dhowells@redhat.com\nLKML-Reference: \u003c1258908830885-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "9f680ab41485edfdc96331b70afa7513aa0a7720", "tree": "620b34f8129c0ea4ddee033c9875a9f60bfba2ae", "parents": [ "b668c9cf3e58739dac54a1d6f42f2b4bdd980b3e" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Nov 22 08:53:49 2009 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Nov 22 18:58:16 2009 +0100" }, "message": "rcu: Eliminate unneeded function wrapping\n\nThe functions rcu_init() is a wrapper for __rcu_init(), and also\nsets up the CPU-hotplug notifier for rcu_barrier_cpu_hotplug().\nBut TINY_RCU doesn\u0027t need CPU-hotplug notification, and the\nrcu_barrier_cpu_hotplug() is a simple wrapper for\nrcu_cpu_notify().\n\nSo push rcu_init() out to kernel/rcutree.c and kernel/rcutiny.c\nand get rid of the wrapper function rcu_barrier_cpu_hotplug().\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: mathieu.desnoyers@polymtl.ca\nCc: josh@joshtriplett.org\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nCc: Valdis.Kletnieks@vt.edu\nCc: dhowells@redhat.com\nLKML-Reference: \u003c12589088302320-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "4ce5b90340879ce93d169b7b523c2cbbe7c45843", "tree": "1372672a37f331a49c3825876a4c3e71ad2df3a0", "parents": [ "cf886c44ec418a01b2c52493465accb81acbf930" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Oct 26 07:55:55 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Oct 26 09:40:40 2009 +0100" }, "message": "rcu: Do tiny cleanups in rcutiny\n\nNo change in functionality - just straighten out a few small\nstylistic details.\n\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc: Josh Triplett \u003cjosh@joshtriplett.org\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: mathieu.desnoyers@polymtl.ca\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nCc: Valdis.Kletnieks@vt.edu\nCc: avi@redhat.com\nCc: mtosatti@redhat.com\nLKML-Reference: \u003c12565226351355-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "9b1d82fa1611706fa7ee1505f290160a18caf95d", "tree": "7b2eed068360465d0b028d345eb318b1a8217305", "parents": [ "0edf1a683e499191b27a067956ae9f5fa6e046c6" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Oct 25 19:03:50 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Oct 26 09:40:29 2009 +0100" }, "message": "rcu: \"Tiny RCU\", The Bloatwatch Edition\n\nThis patch is a version of RCU designed for !SMP provided for a\nsmall-footprint RCU implementation. In particular, the\nimplementation of synchronize_rcu() is extremely lightweight and\nhigh performance. It passes rcutorture testing in each of the\nfour relevant configurations (combinations of NO_HZ and PREEMPT)\non x86. This saves about 1K bytes compared to old Classic RCU\n(which is no longer in mainline), and more than three kilobytes\ncompared to Hierarchical RCU (updated to 2.6.30):\n\n\tCONFIG_TREE_RCU:\n\n\t text\t data\t bss\t dec\t filename\n\t 183 4 0 187 kernel/rcupdate.o\n\t 2783 520 36 3339 kernel/rcutree.o\n\t\t\t\t 3526 Total (vs 4565 for v7)\n\n\tCONFIG_TREE_PREEMPT_RCU:\n\n\t text\t data\t bss\t dec\t filename\n\t 263 4 0 267 kernel/rcupdate.o\n\t 4594 776 52 5422 kernel/rcutree.o\n\t \t\t\t 5689 Total (6155 for v7)\n\n\tCONFIG_TINY_RCU:\n\n\t text\t data\t bss\t dec\t filename\n\t 96 4 0 100 kernel/rcupdate.o\n\t 734 24 0 758 kernel/rcutiny.o\n\t \t\t\t 858 Total (vs 848 for v7)\n\nThe above is for x86. Your mileage may vary on other platforms.\nFurther compression is possible, but is being procrastinated.\n\nChanges from v7 (http://lkml.org/lkml/2009/10/9/388)\n\no\tApply Lai Jiangshan\u0027s review comments (aside from\nmight_sleep() \tin synchronize_sched(), which is covered by SMP builds).\n\no\tFix up expedited primitives.\n\nChanges from v6 (http://lkml.org/lkml/2009/9/23/293).\n\no\tForward ported to put it into the 2.6.33 stream.\n\no\tAdded lockdep support.\n\no\tMake lightweight rcu_barrier.\n\nChanges from v5 (http://lkml.org/lkml/2009/6/23/12).\n\no\tPorted to latest pre-2.6.32 merge window kernel.\n\n\t- Renamed rcu_qsctr_inc() to rcu_sched_qs().\n\t- Renamed rcu_bh_qsctr_inc() to rcu_bh_qs().\n\t- Provided trivial rcu_cpu_notify().\n\t- Provided trivial exit_rcu().\n\t- Provided trivial rcu_needs_cpu().\n\t- Fixed up the rcu_*_enter/exit() functions in linux/hardirq.h.\n\no\tRemoved the dependence on EMBEDDED, with a view to making\n\tTINY_RCU default for !SMP at some time in the future.\n\no\tAdded (trivial) support for expedited grace periods.\n\nChanges from v4 (http://lkml.org/lkml/2009/5/2/91) include:\n\no\tSqueeze the size down a bit further by removing the\n\t-\u003ecompleted field from struct rcu_ctrlblk.\n\no\tThis permits synchronize_rcu() to become the empty function.\n\tPrevious concerns about rcutorture were unfounded, as\n\trcutorture correctly handles a constant value from\n\trcu_batches_completed() and rcu_batches_completed_bh().\n\nChanges from v3 (http://lkml.org/lkml/2009/3/29/221) include:\n\no\tChanged rcu_batches_completed(), rcu_batches_completed_bh()\n\trcu_enter_nohz(), rcu_exit_nohz(), rcu_nmi_enter(), and\n\trcu_nmi_exit(), to be static inlines, as suggested by David\n\tHowells. Doing this saves about 100 bytes from rcutiny.o.\n\t(The numbers between v3 and this v4 of the patch are not directly\n\tcomparable, since they are against different versions of Linux.)\n\nChanges from v2 (http://lkml.org/lkml/2009/2/3/333) include:\n\no\tFix whitespace issues.\n\no\tChange short-circuit \"||\" operator to instead be \"+\" in order\nto \tfix performance bug noted by \"kraai\" on LWN.\n\n\t\t(http://lwn.net/Articles/324348/)\n\nChanges from v1 (http://lkml.org/lkml/2009/1/13/440) include:\n\no\tThis version depends on EMBEDDED as well as !SMP, as suggested\n\tby Ingo.\n\no\tUpdated rcu_needs_cpu() to unconditionally return zero,\n\tpermitting the CPU to enter dynticks-idle mode at any time.\n\tThis works because callbacks can be invoked upon entry to\n\tdynticks-idle mode.\n\no\tPaul is now OK with this being included, based on a poll at\nthe \tKernel Miniconf at linux.conf.au, where about ten people said\n\tthat they cared about saving 900 bytes on single-CPU systems.\n\no\tApplies to both mainline and tip/core/rcu.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\nReviewed-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: dipankar@in.ibm.com\nCc: mathieu.desnoyers@polymtl.ca\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nCc: Valdis.Kletnieks@vt.edu\nCc: avi@redhat.com\nCc: mtosatti@redhat.com\nLKML-Reference: \u003c12565226351355-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" } ] }