)]}' { "log": [ { "commit": "e6b80a3b0994ea6c3d876d72464f2debbfcfeb05", "tree": "207337c207fecf2e05e52ffb3003831d240529fd", "parents": [ "a0f8eefb127f5be07628954f310a7fc8c82b2fc3" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Oct 07 16:25:18 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Dec 11 10:31:30 2011 -0800" }, "message": "rcu: Detect illegal rcu dereference in extended quiescent state\n\nReport that none of the rcu read lock maps are held while in an RCU\nextended quiescent state (the section between rcu_idle_enter()\nand rcu_idle_exit()). This helps detect any use of rcu_dereference()\nand friends from within the section in idle where RCU is not allowed.\n\nThis way we can guarantee an extended quiescent window where the CPU\ncan be put in dyntick idle mode or can simply aoid to be part of any\nglobal grace period completion while in the idle loop.\n\nUses of RCU from such mode are totally ignored by RCU, hence the\nimportance of these checks.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\n" }, { "commit": "91afaf300269aa99a4d646969b3258b74294ac4d", "tree": "b4d7dd5f5c9933be7873b206624f7b55eb25d906", "parents": [ "a8eecf2248a45bf69f0625b23c003ad2ccd765ee" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Sun Oct 02 07:44:32 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Dec 11 10:31:26 2011 -0800" }, "message": "rcu: Add failure tracing to rcutorture\n\nTrace the rcutorture RCU accesses and dump the trace buffer when the\nfirst failure is detected.\n\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\n" }, { "commit": "9984de1a5a8a96275fcab818f7419af5a3c86e71", "tree": "1935d411752707a1621c5caf64f75dfe105beb3a", "parents": [ "7c77509c542927ee2a3c8812fad84957e51bf67d" ], "author": { "name": "Paul Gortmaker", "email": "paul.gortmaker@windriver.com", "time": "Mon May 23 14:51:41 2011 -0400" }, "committer": { "name": "Paul Gortmaker", "email": "paul.gortmaker@windriver.com", "time": "Mon Oct 31 09:20:12 2011 -0400" }, "message": "kernel: Map most files to use export.h instead of module.h\n\nThe changed files were only including linux/module.h for the\nEXPORT_SYMBOL infrastructure, and nothing else. Revector them\nonto the isolated export header for faster compile times.\n\nNothing to see here but a whole lot of instances of:\n\n -#include \u003clinux/module.h\u003e\n +#include \u003clinux/export.h\u003e\n\nThis commit is only changing the kernel dir; next targets\nwill probably be mm, fs, the arch dirs, etc.\n\nSigned-off-by: Paul Gortmaker \u003cpaul.gortmaker@windriver.com\u003e\n" }, { "commit": "29c00b4a1d9e277786120032aa8364631820d863", "tree": "23bf0c8cdb5268ef92ef9ed007639705e922b1b0", "parents": [ "9d68197c05201d8edc70d58bd1d5dad05d8455e8" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Fri Jun 17 15:53:19 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Sep 28 21:38:12 2011 -0700" }, "message": "rcu: Add event-tracing for RCU callback invocation\n\nThere was recently some controversy about the overhead of invoking RCU\ncallbacks. Add TRACE_EVENT()s to obtain fine-grained timings for the\nstart and stop of a batch of callbacks and also for each callback invoked.\n\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "2c42818e962e2858334bf45bfc56662b3752df34", "tree": "192364123c9aeeab282c53168e51eddece9d8be4", "parents": [ "f039d1f1884b2fe9c13d28f59d8330f0b0518fc4" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu May 26 22:14:36 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Sep 28 21:36:42 2011 -0700" }, "message": "rcu: Abstract common code for RCU grace-period-wait primitives\n\nPull the code that waits for an RCU grace period into a single function,\nwhich is then called by synchronize_rcu() and friends in the case of\nTREE_RCU and TREE_PREEMPT_RCU, and from rcu_barrier() and friends in\nthe case of TINY_RCU and TINY_PREEMPT_RCU.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "60063497a95e716c9a689af3be2687d261f115b4", "tree": "6ce0d68db76982c53df46aee5f29f944ebf2c320", "parents": [ "148817ba092f9f6edd35bad3c6c6b8e8f90fe2ed" ], "author": { "name": "Arun Sharma", "email": "asharma@fb.com", "time": "Tue Jul 26 16:09:06 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 26 16:49:47 2011 -0700" }, "message": "atomic: use \u003clinux/atomic.h\u003e\n\nThis allows us to move duplicated code in \u003casm/atomic.h\u003e\n(atomic_inc_not_zero() for now) to \u003clinux/atomic.h\u003e\n\nSigned-off-by: Arun Sharma \u003casharma@fb.com\u003e\nReviewed-by: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nAcked-by: Mike Frysinger \u003cvapier@gentoo.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "108aae22339f445c134aeb48eca25df1014ab08d", "tree": "34a5ecb48e93726932004d36edcd60275cd47ce6", "parents": [ "561190e3b3db372403fb6a327b0121b4cae1b87e" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Feb 23 09:56:00 2011 -0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu May 05 23:16:57 2011 -0700" }, "message": "rcu: Use WARN_ON_ONCE for DEBUG_OBJECTS_RCU_HEAD warnings\n\nAvoid additional multiple-warning confusion in memory-corruption scenarios.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\n" }, { "commit": "fc2ecf7ec76c5ee150b83dcefc863fa03fd365fb", "tree": "2fcdfaf97cf5b9d7a1cfce9e2c8c041c38ea7dfe", "parents": [ "5ece5bab3ed8594ce2c85c6c6e6b82109db36ca7" ], "author": { "name": "Mathieu Desnoyers", "email": "mathieu.desnoyers@polymtl.ca", "time": "Wed Feb 23 09:42:14 2011 -0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu May 05 23:16:57 2011 -0700" }, "message": "rcu: Enable DEBUG_OBJECTS_RCU_HEAD from !PREEMPT\n\nThe prohibition of DEBUG_OBJECTS_RCU_HEAD from !PREEMPT was due to the\nfixup actions. So just produce a warning from !PREEMPT.\n\nSigned-off-by: Mathieu Desnoyers \u003cmathieu.desnoyers@polymtl.ca\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\n" }, { "commit": "e611eecd6f9f91d74beda8cfbb3b5e02abdeb5a1", "tree": "e33c1874cf9cb737032a11985c537097625e28a1", "parents": [ "fe8e64071a4ff5925ced4f33cb32ba090a04649c" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Jan 30 23:56:46 2011 -0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Fri Mar 04 08:05:41 2011 -0800" }, "message": "rcu: add comment saying why DEBUG_OBJECTS_RCU_HEAD depends on PREEMPT.\n\nThe build will break if you change the Kconfig to allow\nDEBUG_OBJECTS_RCU_HEAD and !PREEMPT, so document the reasoning\nnear where the breakage would occur.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "fe8e64071a4ff5925ced4f33cb32ba090a04649c", "tree": "0dd376d34c757300b8dcd6ce277e846d966dc6bb", "parents": [ "fea651267e52a88e7b81e01b6717d968254b6ddb" ], "author": { "name": "Amerigo Wang", "email": "amwang@redhat.com", "time": "Sun Jan 30 18:23:08 2011 +0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Fri Mar 04 08:05:33 2011 -0800" }, "message": "rcupdate: remove dead code\n\nDEBUG_OBJECTS_RCU_HEAD depends on PREEMPT, so #ifndef CONFIG_PREEMPT\nis totally useless in kernel/rcupdate.c.\n\nSigned-off-by: WANG Cong \u003camwang@redhat.com\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "d4f8f217b8a5d5bd02af979650418dca4caec472", "tree": "af047bfa9729c975e24cb7624107574e884d3a57", "parents": [ "2dfbf4dfbe47a484bae20456c12b40763b9b6af7", "773e3f93577ffb493fb7c39b1a6ecf39b5748e87" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Oct 07 09:43:11 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Oct 07 09:43:11 2010 +0200" }, "message": "Merge branch \u0027rcu/urgent\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu into core/rcu\n" }, { "commit": "773e3f93577ffb493fb7c39b1a6ecf39b5748e87", "tree": "78340c40e26e3dbcbde66b013710b6c916ecc05b", "parents": [ "b3a084b9b684622b149e8dcf03855bf0d5fb588b" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Oct 05 14:03:02 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Oct 05 14:03:02 2010 -0700" }, "message": "rcu: move check from rcu_dereference_bh to rcu_read_lock_bh_held\n\nAs suggested by Linus, push the irqs_disabled() down to the\nrcu_read_lock_bh_held() level so that all callers get the benefit\nof the correct check.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "ca5ecddfa8fcbd948c95530e7e817cee9fb43a3d", "tree": "0ad1c320c2e6612a9a230a58d8588850701c048c", "parents": [ "d34a16661ed0fed433c9469d7cfa3ca4d30ca42e" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Apr 28 14:39:09 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Aug 19 17:17:59 2010 -0700" }, "message": "rcu: define __rcu address space modifier for sparse\n\nThis commit provides definitions for the __rcu annotation defined earlier.\nThis annotation permits sparse to check for correct use of RCU-protected\npointers. If a pointer that is annotated with __rcu is accessed\ndirectly (as opposed to via rcu_dereference(), rcu_assign_pointer(),\nor one of their variants), sparse can be made to complain. To enable\nsuch complaints, use the new default-disabled CONFIG_SPARSE_RCU_POINTER\nkernel configuration option. Please note that these sparse complaints are\nintended to be a debugging aid, -not- a code-style-enforcement mechanism.\n\nThere are special rcu_dereference_protected() and rcu_access_pointer()\naccessors for use when RCU read-side protection is not required, for\nexample, when no other CPU has access to the data structure in question\nor while the current CPU hold the update-side lock.\n\nThis patch also updates a number of docbook comments that were showing\ntheir age.\n\nSigned-off-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Christopher Li \u003csparse@chrisli.org\u003e\nReviewed-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\n" }, { "commit": "551d55a944b143ef26fbd482d1c463199d6f65cf", "tree": "6911d3f8e8719ba5ca43c83acdf87cbc8276d7d1", "parents": [ "875352c94224c88f5aa28cb77206f993bd31b7a2" ], "author": { "name": "Mathieu Desnoyers", "email": "mathieu.desnoyers@efficios.com", "time": "Sat Apr 17 08:48:42 2010 -0400" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon Jun 14 16:37:26 2010 -0700" }, "message": "tree/tiny rcu: Add debug RCU head objects\n\nHelps finding racy users of call_rcu(), which results in hangs because list\nentries are overwritten and/or skipped.\n\nChangelog since v4:\n- Bissectability is now OK\n- Now generate a WARN_ON_ONCE() for non-initialized rcu_head passed to\n call_rcu(). Statically initialized objects are detected with\n object_is_static().\n- Rename rcu_head_init_on_stack to init_rcu_head_on_stack.\n- Remove init_rcu_head() completely.\n\nChangelog since v3:\n- Include comments from Lai Jiangshan\n\nThis new patch version is based on the debugobjects with the newly introduced\n\"active state\" tracker.\n\nNon-initialized entries are all considered as \"statically initialized\". An\nactivation fixup (triggered by call_rcu()) takes care of performing the debug\nobject initialization without issuing any warning. Since we cannot increase the\nsize of struct rcu_head, I don\u0027t see much room to put an identifier for\nstatically initialized rcu_head structures. So for now, we have to live without\n\"activation without explicit init\" detection. But the main purpose of this debug\noption is to detect double-activations (double call_rcu() use of a rcu_head\nbefore the callback is executed), which is correctly addressed here.\n\nThis also detects potential internal RCU callback corruption, which would cause\nthe callbacks to be executed twice.\n\nSigned-off-by: Mathieu Desnoyers \u003cmathieu.desnoyers@efficios.com\u003e\nCC: David S. Miller \u003cdavem@davemloft.net\u003e\nCC: \"Paul E. McKenney\" \u003cpaulmck@linux.vnet.ibm.com\u003e\nCC: akpm@linux-foundation.org\nCC: mingo@elte.hu\nCC: laijs@cn.fujitsu.com\nCC: dipankar@in.ibm.com\nCC: josh@joshtriplett.org\nCC: dvhltc@us.ibm.com\nCC: niv@us.ibm.com\nCC: tglx@linutronix.de\nCC: peterz@infradead.org\nCC: rostedt@goodmis.org\nCC: Valdis.Kletnieks@vt.edu\nCC: dhowells@redhat.com\nCC: eric.dumazet@gmail.com\nCC: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\n" }, { "commit": "bbad937983147c017c25406860287cb94da9af7c", "tree": "57311598c360b92b189c7ec337146e4bc779c73d", "parents": [ "25502a6c13745f4650cc59322bd198194f55e796" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Fri Apr 02 16:17:17 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:34 2010 -0700" }, "message": "rcu: slim down rcutiny by removing rcu_scheduler_active and friends\n\nTINY_RCU does not need rcu_scheduler_active unless CONFIG_DEBUG_LOCK_ALLOC.\nSo conditionally compile rcu_scheduler_active in order to slim down\nrcutiny a bit more. Also gets rid of an EXPORT_SYMBOL_GPL, which is\nresponsible for most of the slimming.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "ee84b8243b07c33a5c8aed42b4b2da60cb16d1d2", "tree": "a5b3cad55179fe8340c6422deaf6e11120222ad1", "parents": [ "ad4ba375373937817404fd92239ef4cadbded23b" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu May 06 09:28:41 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu May 06 09:28:41 2010 -0700" }, "message": "rcu: create rcu_my_thread_group_empty() wrapper\n\nSome RCU-lockdep splat repairs need to know whether they are running\nin a single-threaded process. Unfortunately, the thread_group_empty()\nprimitive is defined in sched.h, and can induce #include hell. This\ncommit therefore introduces a rcu_my_thread_group_empty() wrapper that\nis defined in rcupdate.c, thus avoiding the need to include sched.h\neverywhere.\n\nSigned-off-by: \"Paul E. McKenney\" \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "bc293d62b26ec590afc90a9e0a31c45d355b7bd8", "tree": "4b61dee53e849f0ba1d5a7fef58522e224be836e", "parents": [ "50aec0024eccb1d5f540ab64a1958eebcdb9340c" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Apr 15 12:50:39 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Apr 19 08:37:19 2010 +0200" }, "message": "rcu: Make RCU lockdep check the lockdep_recursion variable\n\nThe lockdep facility temporarily disables lockdep checking by\nincrementing the current-\u003elockdep_recursion variable. Such\ndisabling happens in NMIs and in other situations where lockdep\nmight expect to recurse on itself.\n\nThis patch therefore checks current-\u003elockdep_recursion, disabling RCU\nlockdep splats when this variable is non-zero. In addition, this patch\nremoves the \"likely()\", as suggested by Lai Jiangshan.\n\nReported-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nReported-by: David Miller \u003cdavem@davemloft.net\u003e\nTested-by: Frederic Weisbecker \u003cfweisbec@gmail.com\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\nCc: eric.dumazet@gmail.com\nLKML-Reference: \u003c20100415195039.GA22623@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "e3818b8dce2a934cd1521dbc4827e5238d8f45d8", "tree": "871d73c67a9bfd84b7ed7c49e9d4027eac7e577f", "parents": [ "a3d3203e4bb40f253b1541e310dc0f9305be7c84" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon Mar 15 17:03:43 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 16 09:57:49 2010 +0100" }, "message": "rcu: Make rcu_read_lock_bh_held() allow for disabled BH\n\nDisabling BH can stand in for rcu_read_lock_bh(), and this patch\nupdates rcu_read_lock_bh_held() to allow for this. In order to\navoid include-file hell, this function is moved out of line to\nkernel/rcupdate.c.\n\nThis fixes a false positive RCU warning.\n\nReported-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nReported-by: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nAcked-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\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: \u003c20100316000343.GA25857@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "f5f654096487c6d526c47bb66308f9de81f091cf", "tree": "89d9abb7b783592cc5fee858116cf4f83f274cb8", "parents": [ "d9f1bb6ad7fc53c406706f47858dd5ff030b14a3" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Feb 25 19:02:30 2010 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Feb 26 08:20:46 2010 +0100" }, "message": "rcu: Export rcu_scheduler_active\n\nKernel modules using rcu_read_lock_sched_held() must now have\naccess to rcu_scheduler_active, so it must be exported.\n\nThis should fix the fix for the boot-time RCU-lockdep splat.\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: \u003c20100226030230.GA7743@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "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": "632ee200130899252508c478ad0e808222573fbc", "tree": "e3f44ca9daf2a2da2186419f703bc9cec8faa058", "parents": [ "996de8c6fe95c5a9fc524241cc8f142ef0605d3d" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon Feb 22 17:04:45 2010 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Feb 25 09:40:59 2010 +0100" }, "message": "rcu: Introduce lockdep-based checking to RCU read-side primitives\n\nInspection is proving insufficient to catch all RCU misuses,\nwhich is understandable given that rcu_dereference() might be\nprotected by any of four different flavors of RCU (RCU, RCU-bh,\nRCU-sched, and SRCU), and might also/instead be protected by any\nof a number of locking primitives. It is therefore time to\nenlist the aid of lockdep.\n\nThis set of patches is inspired by earlier work by Peter\nZijlstra and Thomas Gleixner, and takes the following approach:\n\no\tSet up separate lockdep classes for RCU, RCU-bh, and RCU-sched.\n\no\tSet up separate lockdep classes for each instance of SRCU.\n\no\tCreate primitives that check for being in an RCU read-side\n\tcritical section. These return exact answers if lockdep is\n\tfully enabled, but if unsure, report being in an RCU read-side\n\tcritical section. (We want to avoid false positives!)\n\tThe primitives are:\n\n\tFor RCU: rcu_read_lock_held(void)\n\n\tFor RCU-bh: rcu_read_lock_bh_held(void)\n\n\tFor RCU-sched: rcu_read_lock_sched_held(void)\n\n\tFor SRCU: srcu_read_lock_held(struct srcu_struct *sp)\n\no\tAdd rcu_dereference_check(), which takes a second argument\n\tin which one places a boolean expression based on the above\n\tprimitives and/or lockdep_is_held().\n\no\tA new kernel configuration parameter, CONFIG_PROVE_RCU, enables\n\trcu_dereference_check(). This depends on CONFIG_PROVE_LOCKING,\n\tand should be quite helpful during the transition period while\n\tCONFIG_PROVE_RCU-unaware patches are in flight.\n\nThe existing rcu_dereference() primitive does no checking, but\nupcoming patches will change that.\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: \u003c1266887105-1528-1-git-send-email-paulmck@linux.vnet.ibm.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": "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" }, { "commit": "d0ec774cb2599c858be9d923bb873cf6697520d8", "tree": "0897fd843622033a6db6ab43167e47c3236aa22d", "parents": [ "322a2c100a8998158445599ea437fb556aa95b11" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Oct 06 21:48:16 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Oct 07 08:11:20 2009 +0200" }, "message": "rcu: Move rcu_barrier() to rcutree\n\nMove the existing rcu_barrier() implementation to rcutree.c,\nconsistent with the fact that the rcu_barrier() implementation is\ntied quite tightly to the RCU implementation.\n\nThis opens the way to simplify and fix rcutree.c\u0027s rcu_barrier()\nimplementation in a later patch.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: akpm@linux-foundation.org\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: \u003c12548908982563-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "135c8aea557cf53abe6c8847e286d01442124193", "tree": "82d8ca15e13548749c7770e9a1a7bc6800ebefbb", "parents": [ "a0b6c9a78c41dc36732d6e1e90f0f2f57b29816f" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon Sep 28 21:50:21 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Oct 05 21:02:05 2009 +0200" }, "message": "rcu: Replace the rcu_barrier enum with pointer to call_rcu*() function\n\nThe rcu_barrier enum causes several problems:\n\n (1) you have to define the enum somewhere, and there is no\n convenient place,\n\n (2) the difference between TREE_RCU and TREE_PREEMPT_RCU causes\n problems when you need to map from rcu_barrier enum to struct\n rcu_state,\n\n (3) the switch statement are large, and\n\n (4) TINY_RCU really needs a different rcu_barrier() than do the\n treercu implementations.\n\nSo replace it with a functionally equivalent but cleaner function\npointer abstraction.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nAcked-by: Mathieu Desnoyers \u003cmathieu.desnoyers@polymtl.ca\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: akpm@linux-foundation.org\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: \u003c12541998232366-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "162cc2794df37662beb7f97ddd1dd5bffaf85e9a", "tree": "88619bce8fce70c4f19c1a5809448d7b624bbb9e", "parents": [ "9b2619aff0332e95ea5eb7a0d75b0208818d871c" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Sep 23 16:18:13 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Oct 05 21:01:28 2009 +0200" }, "message": "rcu: Fix rcu_lock_map build failure on CONFIG_PROVE_LOCKING\u003dy\n\nMove the rcu_lock_map definition from rcutree.c to rcupdate.c so that\nTINY_RCU can use lockdep.\n\nReported-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "9b2619aff0332e95ea5eb7a0d75b0208818d871c", "tree": "a1aed182c4f1ec511352c0e3cb3eba0e20535263", "parents": [ "1eba8f84380bede3c602bd7758dea96925cead01" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Sep 23 09:50:43 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 23 19:46:30 2009 +0200" }, "message": "rcu: Clean up code to address Ingo\u0027s checkpatch feedback\n\nMove declarations and update storage classes to make checkpatch happy.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: akpm@linux-foundation.org\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: \u003c12537246441701-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "a71fca58b7f4abca551ae2256ac08dd9123a03f9", "tree": "55bef0550ff2558a117d768426474e15b081ff4b", "parents": [ "49e291266d0920264471d9d64268fb030e33a99a" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Fri Sep 18 10:28:19 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Sep 19 08:53:22 2009 +0200" }, "message": "rcu: Fix whitespace inconsistencies\n\nFix a number of whitespace ^Ierrors in the include/linux/rcu*\nand the kernel/rcu* files.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: akpm@linux-foundation.org\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\nLKML-Reference: \u003c20090918172819.GA24405@linux.vnet.ibm.com\u003e\n[ did more checkpatch fixlets ]\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "16e3081191837a6a04733de5cd5d1d1b303140d4", "tree": "6b64a4613b9ac57da30518626a259b6aeeef4944", "parents": [ "c3422bea5f09b0e85704f51f2b01271630b8940b" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Sep 13 09:15:11 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Sep 18 00:06:53 2009 +0200" }, "message": "rcu: Fix synchronize_rcu() for TREE_PREEMPT_RCU\n\nThe redirection of synchronize_sched() to synchronize_rcu() was\nappropriate for TREE_RCU, but not for TREE_PREEMPT_RCU.\n\nFix this by creating an underlying synchronize_sched(). TREE_RCU\nthen redirects synchronize_rcu() to synchronize_sched(), while\nTREE_PREEMPT_RCU has its own version of synchronize_rcu().\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: akpm@linux-foundation.org\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\nLKML-Reference: \u003c12528585111916-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "1423cc033df017c762a9155eec470da77a460141", "tree": "5f44bf17e3df58eeccdd33de8d9d43466d3518e8", "parents": [ "684ca5cc9a772532bc893cdc994bd89bf0773719" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Aug 18 23:06:14 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Aug 19 13:58:54 2009 +0200" }, "message": "rcu: Delay rcu_barrier() wait until beginning of next CPU-hotunplug operation.\n\nIngo Molnar reported this lockup:\n\n [ 200.380003] Hangcheck: hangcheck value past margin!\n [ 248.192003] INFO: task S99local:2974 blocked for more than 120 seconds.\n [ 248.194532] \"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n [ 248.202330] S99local D 0000000c 6256 2974 2687 0x00000000\n [ 248.208929] 9c7ebe90 00000086 6b67ef8b 0000000c 9f25a610 81a69869 00000001 820b6990\n [ 248.216123] 820b6990 820b6990 9c6e4c20 9c6e4eb4 82c78990 00000000 6b993559 0000000c\n [ 248.220616] 9c7ebe90 8105f22a 9c6e4eb4 9c6e4c20 00000001 9c7ebe98 9c7ebeb4 81a65cb3\n [ 248.229990] Call Trace:\n [ 248.234049] [\u003c81a69869\u003e] ? _spin_unlock_irqrestore+0x22/0x37\n [ 248.239769] [\u003c8105f22a\u003e] ? prepare_to_wait+0x48/0x4e\n [ 248.244796] [\u003c81a65cb3\u003e] rcu_barrier_cpu_hotplug+0xaa/0xc9\n [ 248.250343] [\u003c8105f029\u003e] ? autoremove_wake_function+0x0/0x38\n [ 248.256063] [\u003c81062cf2\u003e] notifier_call_chain+0x49/0x71\n [ 248.261263] [\u003c81062da0\u003e] raw_notifier_call_chain+0x11/0x13\n [ 248.266809] [\u003c81a0b475\u003e] _cpu_down+0x272/0x288\n [ 248.271316] [\u003c81a0b4d5\u003e] cpu_down+0x4a/0xa2\n [ 248.275563] [\u003c81a0c48a\u003e] store_online+0x2a/0x5e\n [ 248.280156] [\u003c81a0c460\u003e] ? store_online+0x0/0x5e\n [ 248.284836] [\u003c814ddc35\u003e] sysdev_store+0x20/0x28\n [ 248.289429] [\u003c8112e403\u003e] sysfs_write_file+0xb8/0xe3\n [ 248.294369] [\u003c8112e34b\u003e] ? sysfs_write_file+0x0/0xe3\n [ 248.299396] [\u003c810e4c8f\u003e] vfs_write+0x91/0x120\n [ 248.303817] [\u003c810e4dc1\u003e] sys_write+0x40/0x65\n [ 248.308150] [\u003c81002d73\u003e] sysenter_do_call+0x12/0x28\n\nThis change moves an RCU grace period delay off of the\ncritical path for CPU-hotunplug operations.\n\nSince RCU callback migration is only performed on\nCPU-hotunplug operations, and since the rcu_barrier() race is\nprovoked only by consecutive CPU-hotunplug operations, it is\nnot necessary to delay the end of a given CPU-hotunplug\noperation.\n\nWe can instead choose to delay the beginning of the next\nCPU-hotunplug operation.\n\nReported-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Josh Triplett \u003cjosht@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: akpm@linux-foundation.org\nCc: mathieu.desnoyers@polymtl.ca\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nCc: hugh.dickins@tiscali.co.uk\nCc: benh@kernel.crashing.org\nLKML-Reference: \u003c20090819060614.GA14383@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "2e597558086dec36d5c33521a36e0f6b1bc3f3a7", "tree": "ce8c6ced1c8a3b6bf6170a5894e1d7102e6ee9d4", "parents": [ "799e64f05f4bfaad2bb3165cab95c8c992a1c296" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sat Aug 15 09:53:48 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Aug 15 19:02:08 2009 +0200" }, "message": "rcu: Simplify RCU CPU-hotplug notification\n\nUse the new cpu_notifier() API to simplify RCU\u0027s CPU-hotplug\nnotifiers, collapsing down to a single such notifier.\n\nThis makes it trivial to provide the notifier-ordering\nguarantee that rcu_barrier() depends on.\n\nAlso remove redundant open_softirq() calls from Hierarchical\nRCU notifier.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: laijs@cn.fujitsu.com\nCc: dipankar@in.ibm.com\nCc: josht@linux.vnet.ibm.com\nCc: akpm@linux-foundation.org\nCc: mathieu.desnoyers@polymtl.ca\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nCc: hugh.dickins@tiscali.co.uk\nCc: benh@kernel.crashing.org\nLKML-Reference: \u003c12503552312510-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "03b042bf1dc14a268a3d65d38b4ec2a4261e8477", "tree": "10e422a1396087d14cec164d8f4962d7ce8bcf2d", "parents": [ "c17ef45342cc033fdf7bdd5b28615e0090f8d2e7" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Jun 25 09:08:16 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jul 03 10:02:28 2009 +0200" }, "message": "rcu: Add synchronize_sched_expedited() primitive\n\nThis adds the synchronize_sched_expedited() primitive that\nimplements the \"big hammer\" expedited RCU grace periods.\n\nThis primitive is placed in kernel/sched.c rather than\nkernel/rcupdate.c due to its need to interact closely with the\nmigration_thread() kthread.\n\nThe idea is to wake up this kthread with req-\u003etask set to NULL,\nin response to which the kthread reports the quiescent state\nresulting from the kthread having been scheduled.\n\nBecause this patch needs to fallback to the slow versions of\nthe primitives in response to some races with CPU onlining and\nofflining, a new synchronize_rcu_bh() primitive is added as\nwell.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: akpm@linux-foundation.org\nCc: torvalds@linux-foundation.org\nCc: davem@davemloft.net\nCc: dada1@cosmosbay.com\nCc: zbr@ioremap.net\nCc: jeff.chua.linux@gmail.com\nCc: paulus@samba.org\nCc: laijs@cn.fujitsu.com\nCc: jengelh@medozas.de\nCc: r000n@r000n.net\nCc: benh@kernel.crashing.org\nCc: mathieu.desnoyers@polymtl.ca\nLKML-Reference: \u003c12459460982947-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "5b1d07ed0e5b2707f786957c7a40eb2f399c84a8", "tree": "3cfb5d2004dd9858ef9d4d08f6cdc42b886354fb", "parents": [ "da60682c116855cf342926b4f3427079400ee7e6" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Wed Apr 15 19:35:01 2009 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 15 13:55:14 2009 -0700" }, "message": "RCU: Don\u0027t try and predeclare inline funcs as it upsets some versions of gcc\n\nDon\u0027t try and predeclare inline funcs like this:\n\n\tstatic inline void wait_migrated_callbacks(void)\n\t...\n\tstatic void _rcu_barrier(enum rcu_barrier type)\n\t{\n\t\t...\n\t\twait_migrated_callbacks();\n\t}\n\t...\n\tstatic inline void wait_migrated_callbacks(void)\n\t{\n\t\twait_event(rcu_migrate_wq, !atomic_read(\u0026rcu_migrate_type_count));\n\t}\n\nas it upsets some versions of gcc under some circumstances:\n\n\tkernel/rcupdate.c: In function `_rcu_barrier\u0027:\n\tkernel/rcupdate.c:125: sorry, unimplemented: inlining failed in call to \u0027wait_migrated_callbacks\u0027: function body not available\n\tkernel/rcupdate.c:152: sorry, unimplemented: called from here\n\nThis can be dealt with by simply putting the static variables (rcu_migrate_*)\nat the top, and moving the implementation of the function up so that it\nreplaces its forward declaration.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nCc: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f69b17d7e745d8edd7c0d90390cbaa77e63c5ea3", "tree": "d903954135e29cd882220180d39cef1df30795b8", "parents": [ "dfbbe89e197a77f2c8046a51c74e33e35f878080" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Fri Mar 20 17:40:06 2009 +0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 31 00:09:37 2009 +0200" }, "message": "rcu: rcu_barrier VS cpu_hotplug: Ensure callbacks in dead cpu are migrated to online cpu\n\ncpu hotplug may happen asynchronously, some rcu callbacks are maybe\nstill on dead cpu, rcu_barrier() also needs to wait for these rcu\ncallbacks to complete, so we must ensure callbacks in dead cpu are\nmigrated to online cpu.\n\nPaul E. McKenney\u0027s review:\n\n Good stuff, Lai!!! Simpler than any of the approaches that I was\n considering, and, better yet, independent of the underlying RCU\n implementation!!!\n\n I was initially worried that wake_up() might wake only one of two\n possible wait_event()s, namely rcu_barrier() and the CPU_POST_DEAD code,\n but the fact that wait_event() clears WQ_FLAG_EXCLUSIVE avoids that issue.\n I was also worried about the fact that different RCU implementations have\n different mappings of call_rcu(), call_rcu_bh(), and call_rcu_sched(), but\n this is OK as well because we just get an extra (harmless) callback in the\n case that they map together (for example, Classic RCU has call_rcu_sched()\n mapping to call_rcu()).\n\n Overlap of CPU-hotplug operations is prevented by cpu_add_remove_lock,\n and any stray callbacks that arrive (for example, from irq handlers\n running on the dying CPU) either are ahead of the CPU_DYING callbacks on\n the one hand (and thus accounted for), or happened after the rcu_barrier()\n started on the other (and thus don\u0027t need to be accounted for).\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nReviewed-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLKML-Reference: \u003c49C36476.1010400@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "a682604838763981613e42015cd0e39f2989d6bb", "tree": "29eae425e484edc494807702696c240ce09ba3f5", "parents": [ "694593e3374a67d95ece6a275a1f181644c2c4d8" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Feb 25 18:03:42 2009 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Feb 26 04:08:14 2009 +0100" }, "message": "rcu: Teach RCU that idle task is not quiscent state at boot\n\nThis patch fixes a bug located by Vegard Nossum with the aid of\nkmemcheck, updated based on review comments from Nick Piggin,\nIngo Molnar, and Andrew Morton. And cleans up the variable-name\nand function-name language. ;-)\n\nThe boot CPU runs in the context of its idle thread during boot-up.\nDuring this time, idle_cpu(0) will always return nonzero, which will\nfool Classic and Hierarchical RCU into deciding that a large chunk of\nthe boot-up sequence is a big long quiescent state. This in turn causes\nRCU to prematurely end grace periods during this time.\n\nThis patch changes the rcutree.c and rcuclassic.c rcu_check_callbacks()\nfunction to ignore the idle task as a quiescent state until the\nsystem has started up the scheduler in rest_init(), introducing a\nnew non-API function rcu_idle_now_means_idle() to inform RCU of this\ntransition. RCU maintains an internal rcu_idle_cpu_truthful variable\nto track this state, which is then used by rcu_check_callback() to\ndetermine if it should believe idle_cpu().\n\nBecause this patch has the effect of disallowing RCU grace periods\nduring long stretches of the boot-up sequence, this patch also introduces\nJosh Triplett\u0027s UP-only optimization that makes synchronize_rcu() be a\nno-op if num_online_cpus() returns 1. This allows boot-time code that\ncalls synchronize_rcu() to proceed normally. Note, however, that RCU\ncallbacks registered by call_rcu() will likely queue up until later in\nthe boot sequence. Although rcuclassic and rcutree can also use this\nsame optimization after boot completes, rcupreempt must restrict its\nuse of this optimization to the portion of the boot sequence before the\nscheduler starts up, given that an rcupreempt RCU read-side critical\nsection may be preeempted.\n\nIn addition, this patch takes Nick Piggin\u0027s suggestion to make the\nsystem_state global variable be __read_mostly.\n\nChanges since v4:\n\no\tChanges the name of the introduced function and variable to\n\tbe less emotional. ;-)\n\nChanges since v3:\n\no\tWARN_ON(nr_context_switches() \u003e 0) to verify that RCU\n\tswitches out of boot-time mode before the first context\n\tswitch, as suggested by Nick Piggin.\n\nChanges since v2:\n\no\tCreated rcu_blocking_is_gp() internal-to-RCU API that\n\tdetermines whether a call to synchronize_rcu() is itself\n\ta grace period.\n\no\tThe definition of rcu_blocking_is_gp() for rcuclassic and\n\trcutree checks to see if but a single CPU is online.\n\no\tThe definition of rcu_blocking_is_gp() for rcupreempt\n\tchecks to see both if but a single CPU is online and if\n\tthe system is still in early boot.\n\n\tThis allows rcupreempt to again work correctly if running\n\ton a single CPU after booting is complete.\n\no\tAdded check to rcupreempt\u0027s synchronize_sched() for there\n\tbeing but one online CPU.\n\nTested all three variants both SMP and !SMP, booted fine, passed a short\nrcutorture test on both x86 and Power.\n\nLocated-by: Vegard Nossum \u003cvegard.nossum@gmail.com\u003e\nTested-by: Vegard Nossum \u003cvegard.nossum@gmail.com\u003e\nTested-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "ea7d3fef4222cd98556a0b386598268d4dbf6670", "tree": "b16f3cbe0f5e13c9bf6472fa9e1c461da0cea5b4", "parents": [ "90a4d2c0106bb690f0b6af3d506febc35c658aa7" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Jan 04 13:03:02 2009 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jan 05 10:18:08 2009 +0100" }, "message": "rcu: eliminate synchronize_rcu_xxx macro\n\nImpact: cleanup\n\nExpand macro into two files.\n\nThe synchronize_rcu_xxx macro is quite ugly and it\u0027s only used by two\ncallers, so expand it instead. This makes this code easier to change.\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "5f86515158ca86182c1dbecd546f1848121ba135", "tree": "056f064fd80d3393f2d94dbdc790a798dbbab9cc", "parents": [ "8cf7d362c0dc2cfda2146d184eedc32a530c8020" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Fri Oct 17 14:40:30 2008 +0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Oct 21 15:59:53 2008 +0200" }, "message": "rcupdate: fix bug of rcu_barrier*()\n\ncurrent rcu_barrier_bh() is like this:\n\nvoid rcu_barrier_bh(void)\n{\n\tBUG_ON(in_interrupt());\n\t/* Take cpucontrol mutex to protect against CPU hotplug */\n\tmutex_lock(\u0026rcu_barrier_mutex);\n\tinit_completion(\u0026rcu_barrier_completion);\n\tatomic_set(\u0026rcu_barrier_cpu_count, 0);\n\t/*\n\t * The queueing of callbacks in all CPUs must be atomic with\n\t * respect to RCU, otherwise one CPU may queue a callback,\n\t * wait for a grace period, decrement barrier count and call\n\t * complete(), while other CPUs have not yet queued anything.\n\t * So, we need to make sure that grace periods cannot complete\n\t * until all the callbacks are queued.\n\t */\n\trcu_read_lock();\n\ton_each_cpu(rcu_barrier_func, (void *)RCU_BARRIER_BH, 1);\n\trcu_read_unlock();\n\twait_for_completion(\u0026rcu_barrier_completion);\n\tmutex_unlock(\u0026rcu_barrier_mutex);\n}\n\nThe inconsistency of the code and the comments show a bug here.\nrcu_read_lock() cannot make sure that \"grace periods for RCU_BH\ncannot complete until all the callbacks are queued\".\nit only make sure that race periods for RCU cannot complete\nuntil all the callbacks are queued.\n\nso we must use rcu_read_lock_bh() for rcu_barrier_bh().\nlike this:\n\nvoid rcu_barrier_bh(void)\n{\n\t......\n\trcu_read_lock_bh();\n\ton_each_cpu(rcu_barrier_func, (void *)RCU_BARRIER_BH, 1);\n\trcu_read_unlock_bh();\n\t......\n}\n\nand also rcu_barrier() rcu_barrier_sched() are implemented like this.\nit will bring a lot of duplicate code. My patch uses another way to\nfix this bug, please see the comment of my patch.\nThank Paul E. McKenney for he rewrote the comment.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nReviewed-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "01dcb0443ed89eccf26c2b43f1ea13b368ae740d", "tree": "30b6c33a6074dd28b15f0441cc96df716360fa68", "parents": [ "6a55617ed5d1aa62b850de2cf66f5ede2eef4825" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Wed Aug 20 16:35:19 2008 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Aug 21 09:31:44 2008 +0200" }, "message": "rcu: fix synchronize_rcu() so that kernel-doc works\n\nFix RCU\u0027s synchronize_rcu() so that it looks like a C function, enabling\nit to be recognized as a function with kernel-doc annotation.\n\nWarning(linux-2.6.26-git11//kernel/rcupdate.c:81): No description found for parameter \u0027synchronize_rcu\u0027\nWarning(linux-2.6.26-git11//kernel/rcupdate.c:81): No description found for parameter \u0027call_rcu\u0027\n\n[akpm@linux-foundation.org: fix comment]\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "59190f4213462f191fc0d22d39b1cf18ea39ca39", "tree": "8f30fa62ae7d8948e7974dfecede3d6a41ae3ec3", "parents": [ "64fd52a52077d3cd5a778ca031c0aaecf885eaa6", "f6f88e9bfb6ced9871ed65ebe85c371de3c9e4be" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 15 14:02:33 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 15 14:12:03 2008 -0700" }, "message": "Merge branch \u0027generic-ipi-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027generic-ipi-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (22 commits)\n generic-ipi: more merge fallout\n generic-ipi: merge fix\n x86, visws: use mach-default/entry_arch.h\n x86, visws: fix generic-ipi build\n generic-ipi: fixlet\n generic-ipi: fix s390 build bug\n generic-ipi: fix linux-next tree build failure\n fix: \"smp_call_function: get rid of the unused nonatomic/retry argument\"\n fix: \"smp_call_function: get rid of the unused nonatomic/retry argument\"\n fix \"smp_call_function: get rid of the unused nonatomic/retry argument\"\n on_each_cpu(): kill unused \u0027retry\u0027 parameter\n smp_call_function: get rid of the unused nonatomic/retry argument\n sh: convert to generic helpers for IPI function calls\n parisc: convert to generic helpers for IPI function calls\n mips: convert to generic helpers for IPI function calls\n m32r: convert to generic helpers for IPI function calls\n arm: convert to generic helpers for IPI function calls\n alpha: convert to generic helpers for IPI function calls\n ia64: convert to generic helpers for IPI function calls\n powerpc: convert to generic helpers for IPI function calls\n ...\n\nFix trivial conflicts due to rcu updates in kernel/rcupdate.c manually\n" }, { "commit": "15c8b6c1aaaf1c4edd67e2f02e4d8e1bd1a51c0d", "tree": "3658f893c2f89ea0be4c6cc08aa11fa54476d0f4", "parents": [ "8691e5a8f691cc2a4fda0651e8d307aaba0e7d68" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri May 09 09:39:44 2008 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Thu Jun 26 11:24:38 2008 +0200" }, "message": "on_each_cpu(): kill unused \u0027retry\u0027 parameter\n\nIt\u0027s not even passed on to smp_call_function() anymore, since that\nwas removed. So kill it.\n\nAcked-by: Jeremy Fitzhardinge \u003cjeremy.fitzhardinge@citrix.com\u003e\nReviewed-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "70f12f848d3e981479b4f6f751e73c14f7c13e5b", "tree": "f964e121463ab2f6b697f043bf487017bc85d635", "parents": [ "8db559b83009bed92e1b5dd13a651ff273d9ff62" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 12 21:21:05 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon May 19 10:01:36 2008 +0200" }, "message": "rcu: add rcu_barrier_sched() and rcu_barrier_bh()\n\nAdd rcu_barrier_sched() and rcu_barrier_bh(). With these in place,\nrcutorture no longer gives the occasional oops when repeatedly starting\nand stopping torturing rcu_bh. Also adds the API needed to flush out\npre-existing call_rcu_sched() callbacks.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Mathieu Desnoyers \u003cmathieu.desnoyers@polymtl.ca\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "4446a36ff8c74ac3b32feb009b651048e129c6af", "tree": "4ae726073e02281c2de51ed394ba2a812fd55c9b", "parents": [ "8b09dee67f484e9b42114b1a1f068e080fd7aa56" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 12 21:21:05 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon May 19 10:01:36 2008 +0200" }, "message": "rcu: add call_rcu_sched()\n\nFourth cut of patch to provide the call_rcu_sched(). This is again to\nsynchronize_sched() as call_rcu() is to synchronize_rcu().\n\nShould be fine for experimental and -rt use, but not ready for inclusion.\nWith some luck, I will be able to tell Andrew to come out of hiding on\nthe next round.\n\nPasses multi-day rcutorture sessions with concurrent CPU hotplugging.\n\nFixes since the first version include a bug that could result in\nindefinite blocking (spotted by Gautham Shenoy), better resiliency\nagainst CPU-hotplug operations, and other minor fixes.\n\nFixes since the second version include reworking grace-period detection\nto avoid deadlocks that could happen when running concurrently with\nCPU hotplug, adding Mathieu\u0027s fix to avoid the softlockup messages,\nas well as Mathieu\u0027s fix to allow use earlier in boot.\n\nFixes since the third version include a wrong-CPU bug spotted by\nAndrew, getting rid of the obsolete synchronize_kernel API that somehow\nsnuck back in, merging spin_unlock() and local_irq_restore() in a\nfew places, commenting the code that checks for quiescent states based\non interrupting from user-mode execution or the idle loop, removing\nsome inline attributes, and some code-style changes.\n\nKnown/suspected shortcomings:\n\no\tI still do not entirely trust the sleep/wakeup logic. Next step\n\twill be to use a private snapshot of the CPU online mask in\n\trcu_sched_grace_period() -- if the CPU wasn\u0027t there at the start\n\tof the grace period, we don\u0027t need to hear from it. And the\n\tbit about accounting for changes in online CPUs inside of\n\trcu_sched_grace_period() is ugly anyway.\n\no\tIt might be good for rcu_sched_grace_period() to invoke\n\tresched_cpu() when a given CPU wasn\u0027t responding quickly,\n\tbut resched_cpu() is declared static...\n\nThis patch also fixes a long-standing bug in the earlier preemptable-RCU\nimplementation of synchronize_rcu() that could result in loss of\nconcurrent external changes to a task\u0027s CPU affinity mask. I still cannot\nremember who reported this...\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Mathieu Desnoyers \u003cmathieu.desnoyers@polymtl.ca\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "fbf6bfca76d50abef478ba902b8597ecbadfd390", "tree": "e18c2d44937ad35f9478fa8520fbeb7508e8e4b9", "parents": [ "b3c97528689619fc66569b30bf83d09d9929521a" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Feb 13 15:03:15 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Feb 13 16:21:18 2008 -0800" }, "message": "rcupdate: fix comment\n\nThis comment caused some consternation during fastcall removal. Make it\ntruthful.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: 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": "e0ecfa7917cafe72f4a75f87e8bb5d8d51dc534f", "tree": "92106dbd88530d3884bc6c4d1c088cba1ad8630e", "parents": [ "01c1c660f4b8086cad7a62345fd04290f3d82c8f" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Fri Jan 25 21:08:24 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jan 25 21:08:24 2008 +0100" }, "message": "Preempt-RCU: fix rcu_barrier for preemptive environment.\n\nFix rcu_barrier() to work properly in preemptive kernel environment.\nAlso, the ordering of callback must be preserved while moving\ncallbacks to another CPU during CPU hotplug.\n\nSigned-off-by: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nSigned-off-by: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "01c1c660f4b8086cad7a62345fd04290f3d82c8f", "tree": "bd09ab1fc3f9e267b1ea78f1a41b121175e1585a", "parents": [ "c2d727aa2ff17a1c8e5ed1e5e231bb8579b27e82" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Fri Jan 25 21:08:24 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jan 25 21:08:24 2008 +0100" }, "message": "Preempt-RCU: reorganize RCU code into rcuclassic.c and rcupdate.c\n\nThis patch re-organizes the RCU code to enable multiple implementations\nof RCU. Users of RCU continues to include rcupdate.h and the\nRCU interfaces remain the same. This is in preparation for\nsubsequently merging the preemptible RCU implementation.\n\nSigned-off-by: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nSigned-off-by: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "c2d727aa2ff17a1c8e5ed1e5e231bb8579b27e82", "tree": "76b570288a72c1337920c5e60682316c554f00ee", "parents": [ "c49443c538c1bbf50eda27e4a3711e9fc15176b0" ], "author": { "name": "Dipankar Sarma", "email": "dipankar@in.ibm.com", "time": "Fri Jan 25 21:08:23 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jan 25 21:08:23 2008 +0100" }, "message": "Preempt-RCU: Use softirq instead of tasklets for\n\nThis patch makes RCU use softirq instead of tasklets.\n\nIt also adds a memory barrier after raising the softirq\ninorder to ensure that the cpu sees the most recently updated\nvalue of rcu-\u003ecur while processing callbacks.\nThe discussion of the related theoretical race pointed out\nby James Huang can be found here --\u003e http://lkml.org/lkml/2007/11/20/603\n\nSigned-off-by: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nReviewed-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "00e10776ff908a767b3d36a53d330db8fdc53a56", "tree": "fe30e9286df2ecb66842f0e74b3c06a1651737e4", "parents": [ "80c002ddd2e732062e4371314d40515d0b5d8415" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Tue Jan 22 03:31:39 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jan 22 09:17:48 2008 -0800" }, "message": "rcu: fix section mismatch\n\nrcu_online_cpu() should be __cpuinit instead of __devinit.\n\nWARNING: vmlinux.o(.text+0x4b6d5): Section mismatch: reference to .init.text: (between \u0027rcu_cpu_notify\u0027 and \u0027wakeme_after_rcu\u0027)\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nCc: Sam Ravnborg \u003csam@ravnborg.org\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a9022e9cb9e919e31d5bc15fcef5c7186740645e", "tree": "48aea98aec8d9822155b2054bc60f9142f478769", "parents": [ "ea0b7d5da0024df1c6f2c2139dbeb4fd260baac6" ], "author": { "name": "Jesper Juhl", "email": "jesper.juhl@gmail.com", "time": "Tue Oct 16 23:26:23 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:48 2007 -0700" }, "message": "Clean up duplicate includes in kernel/\n\nThis patch cleans up duplicate includes in\n\tkernel/\n\nSigned-off-by: Jesper Juhl \u003cjesper.juhl@gmail.com\u003e\nAcked-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Satyam Sharma \u003cssatyam@cse.iitk.ac.in\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "851a67b825540a8e00c0be3ee25e4627ba8b133b", "tree": "07afd72ad74a392cb30cefcd01acdfd9b01282d3", "parents": [ "34a3d1e83708702ac6cb872215e68cd07dae298b" ], "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: annotate rcu_read_{,un}lock{,_bh}\n\nlockdep annotate rcu_read_{,un}lock{,_bh} in order to catch imbalanced\nusage.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d", "tree": "f4e305edaedbde05774bb1e4acd89a9475661d2e", "parents": [ "f37bc2712b54ec641e0c0c8634f1a4b61d9956c0" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed May 09 02:35:10 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed May 09 12:30:56 2007 -0700" }, "message": "Add suspend-related notifications for CPU hotplug\n\nSince nonboot CPUs are now disabled after tasks and devices have been\nfrozen and the CPU hotplug infrastructure is used for this purpose, we need\nspecial CPU hotplug notifications that will help the CPU-hotplug-aware\nsubsystems distinguish normal CPU hotplug events from CPU hotplug events\nrelated to a system-wide suspend or resume operation in progress. This\npatch introduces such notifications and causes them to be used during\nsuspend and resume transitions. It also changes all of the\nCPU-hotplug-aware subsystems to take these notifications into consideration\n(for now they are handled in the same way as the corresponding \"normal\"\nones).\n\n[oleg@tv-sign.ru: cleanups]\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nCc: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1c69d921ed9cc6593ad4f60c0f9951cb0d62b0b4", "tree": "669149c112fd917d68a301b2bcceae681af17a1c", "parents": [ "9a0efbb8795e8c5acb279d984b53d6af6ecdd00f" ], "author": { "name": "Eric Dumazet", "email": "dada1@cosmosbay.com", "time": "Wed Dec 06 20:38:44 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:40 2006 -0800" }, "message": "[PATCH] rcu: add a prefetch() in rcu_do_batch()\n\nOn some workloads, (for example when lot of close() syscalls are done), RCU\nqlen can be quite large, and RCU heads are no longer in cpu cache when\nrcu_do_batch() is called.\n\nThis patch adds a prefetch() in rcu_do_batch() to give CPU a hint to bring\nback cache lines containing \u0027struct rcu_head\u0027s.\n\nMost list manipulations macros include prefetch(), but not open coded ones\n(at least with current C compilers :) )\n\nI got a nice speedup on a trivial benchmark (3.48 us per iteration instead\nof 3.95 us on a 1.6 GHz Pentium-M)\n\nwhile (1) { pipe(p); close(fd[0]); close(fd[1]);}\n\nSigned-off-by: Eric Dumazet \u003cdada1@cosmosbay.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "20e9751bd9dd6b832fd84ada27840360f7e877f1", "tree": "c598ff9cb9e540da7f8595f2c130f3674065e018", "parents": [ "4b6c2cca6eef9cc4a15350bf1c61839e12e08b84" ], "author": { "name": "Oleg Nesterov", "email": "oleg@tv-sign.ru", "time": "Wed Oct 04 02:17:17 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Oct 04 07:55:31 2006 -0700" }, "message": "[PATCH] rcu: simplify/improve batch tuning\n\nKill a hard-to-calculate \u0027rsinterval\u0027 boot parameter and per-cpu\nrcu_data.last_rs_qlen. Instead, it adds adds a flag rcu_ctrlblk.signaled,\nwhich records the fact that one of CPUs has sent a resched IPI since the\nlast rcu_start_batch().\n\nRoughly speaking, we need two rcu_start_batch()s in order to move callbacks\nfrom -\u003enxtlist to -\u003edonelist. This means that when -\u003eqlen exceeds qhimark\nand continues to grow, we should send a resched IPI, and then do it again\nafter we gone through a quiescent state.\n\nOn the other hand, if it was already sent, we don\u0027t need to do it again\nwhen another CPU detects overflow of the queue.\n\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nAcked-by: Paul E. McKenney \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "dd9daa221e77f642954849a795fa7c59533a9b2f", "tree": "6b207a5296063e1a773f36fb724402ea7cbab7eb", "parents": [ "7fbb36451a91de6e8f9ece4f1f1ee9bd8ebf838a" ], "author": { "name": "Oleg Nesterov", "email": "oleg@tv-sign.ru", "time": "Tue Sep 12 20:35:55 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Sep 13 07:32:14 2006 -0700" }, "message": "[PATCH] rcu_do_batch: make -\u003eqlen decrement irq safe\n\nrcu_do_batch() decrements rdp-\u003eqlen with irqs enabled. This is not good,\nit can also be modified by call_rcu() from interrupt.\n\nDecrement -\u003eqlen once with irqs disabled, after a main loop.\n\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "8c78f3075dab4be279e283f901f00e33ce44890a", "tree": "034d667a713b24d39608b09bd2aafb7983fb6ba5", "parents": [ "cea6a4ba8acfba6f59cc9ed71e0d05cb770b9d9c" ], "author": { "name": "Chandra Seetharaman", "email": "sekharan@us.ibm.com", "time": "Sun Jul 30 03:03:35 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jul 31 13:28:39 2006 -0700" }, "message": "[PATCH] cpu hotplug: replace __devinit* with __cpuinit* for cpu notifications\n\nFew of the callback functions and notifier blocks that are associated with cpu\nnotifications incorrectly have __devinit and __devinitdata. They should be\n__cpuinit and __cpuinitdata instead.\n\nIt makes no functional difference but wastes text area when CONFIG_HOTPLUG is\nenabled and CONFIG_HOTPLUG_CPU is not.\n\nThis patch fixes all those instances.\n\nSigned-off-by: Chandra Seetharaman \u003csekharan@us.ibm.com\u003e\nCc: Ashok Raj \u003cashok.raj@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "e4d919188554a77c798a267e098059bc9aa39726", "tree": "bb5e47e09f5d107db44358ad668988f5ae768ade", "parents": [ "9cebb5526833059f327d237a032422c762378b2a" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jul 03 00:24:34 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jul 03 15:27:02 2006 -0700" }, "message": "[PATCH] lockdep: locking init debugging improvement\n\nLocking init improvement:\n\n - introduce and use __SPIN_LOCK_UNLOCKED for array initializations,\n to pass in the name string of locks, used by debugging\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": "054cc8a2d808822dadf488a61729e3e550f114c4", "tree": "da7e5ecce06d1898263da9b47714b0b0fa972397", "parents": [ "9c7b216d23e820e0e148d5be01bbb5bd2d8378fe" ], "author": { "name": "Chandra Seetharaman", "email": "sekharan@us.ibm.com", "time": "Tue Jun 27 02:54:07 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Jun 27 17:32:41 2006 -0700" }, "message": "[PATCH] cpu hotplug: revert initdata patch submitted for 2.6.17\n\nThis patch reverts notifier_block changes made in 2.6.17\n\nSigned-off-by: Chandra Seetharaman \u003csekharan@us.ibm.com\u003e\nCc: Ashok Raj \u003cashok.raj@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "9c7b216d23e820e0e148d5be01bbb5bd2d8378fe", "tree": "53e6c1e4870db49b4999b4053862d3f63375773f", "parents": [ "6ac12dfe9c2027cd3c5ed603f11d1bb4f04906fe" ], "author": { "name": "Chandra Seetharaman", "email": "sekharan@us.ibm.com", "time": "Tue Jun 27 02:54:07 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Jun 27 17:32:40 2006 -0700" }, "message": "[PATCH] cpu hotplug: revert init patch submitted for 2.6.17\n\nIn 2.6.17, there was a problem with cpu_notifiers and XFS. I provided a\nband-aid solution to solve that problem. In the process, i undid all the\nchanges you both were making to ensure that these notifiers were available\nonly at init time (unless CONFIG_HOTPLUG_CPU is defined).\n\nWe deferred the real fix to 2.6.18. Here is a set of patches that fixes the\nXFS problem cleanly and makes the cpu notifiers available only at init time\n(unless CONFIG_HOTPLUG_CPU is defined).\n\nIf CONFIG_HOTPLUG_CPU is defined then cpu notifiers are available at run\ntime.\n\nThis patch reverts the notifier_call changes made in 2.6.17\n\nSigned-off-by: Chandra Seetharaman \u003csekharan@us.ibm.com\u003e\nCc: Ashok Raj \u003cashok.raj@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "c32e066057fe0914da262c94e52cefb142f965b4", "tree": "c429649e39af7925a443c72f180349a451c7acbe", "parents": [ "72e9bb549280b354311af30640c9433474f3a32c" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@us.ibm.com", "time": "Tue Jun 27 02:54:04 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Jun 27 17:32:40 2006 -0700" }, "message": "[PATCH] rcutorture: add call_rcu_bh() operations\n\nAdd operations for the call_rcu_bh() variant of RCU. Also add an\nrcu_batches_completed_bh() function, which is needed by rcutorture.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "d83015b8f62ee3fcd338f6f009051ed57f77a531", "tree": "11e30548e6b07045f8a17aa4661e1cde6f374b18", "parents": [ "55f4e8d156d23709739029afb108932ef94cac94" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@us.ibm.com", "time": "Fri Jun 23 02:05:51 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jun 23 07:43:07 2006 -0700" }, "message": "[PATCH] Make RCU API inaccessible to non-GPL Linux kernel modules\n\nRemove synchronize_kernel() (deprecated 2-APR-2005 in\nhttp://lkml.org/lkml/2005/4/3/11) and makes the RCU API inaccessible to\nnon-GPL Linux kernel modules (as was announced more than one year ago in\nhttp://lkml.org/lkml/2005/4/3/8). Tested on x86 and ppc64.\n\nSigned-off-by: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "986733e01d258c26107f1da9d8d47c718349ad2f", "tree": "5e0f04a707b8c341f79927ba6fffd0ad55d85c29", "parents": [ "3b7c8108273bed41a2fc04533cc9f2026ff38c8e" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Mon May 15 09:43:58 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon May 15 11:20:55 2006 -0700" }, "message": "[PATCH] RCU: introduce rcu_needs_cpu() interface\n\nWith \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\n\nIntroduce rcu_needs_cpu() interface. This can be used to tell if there\nwill be a new rcu batch on a cpu soon by looking at the curlist pointer.\nThis can be used to avoid to enter a tickless idle state where the cpu\nwould miss that a new batch is ready when rcu_start_batch would be called\non a different cpu.\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "83d722f7e198b034699b1500d98729beff930efd", "tree": "7d790a2fd62165373ec7bacde704837288e0bec3", "parents": [ "649bbaa484bcdce94f40a1b97a6a2ded0549e8a2" ], "author": { "name": "Chandra Seetharaman", "email": "sekharan@us.ibm.com", "time": "Mon Apr 24 19:35:21 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Apr 26 08:30:03 2006 -0700" }, "message": "[PATCH] Remove __devinit and __cpuinit from notifier_call definitions\n\nFew of the notifier_chain_register() callers use __init in the definition\nof notifier_call. It is incorrect as the function definition should be\navailable after the initializations (they do not unregister them during\ninitializations).\n\nThis patch fixes all such usages to _not_ have the notifier_call __init\nsection.\n\nSigned-off-by: Chandra Seetharaman \u003csekharan@us.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "649bbaa484bcdce94f40a1b97a6a2ded0549e8a2", "tree": "f24f05bf95ae9c4164266da87f36fed61c5c2206", "parents": [ "e7edf9cdeddc0cff125e8e658216efb2ff2b2219" ], "author": { "name": "Chandra Seetharaman", "email": "sekharan@us.ibm.com", "time": "Mon Apr 24 19:35:15 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Apr 26 08:27:50 2006 -0700" }, "message": "[PATCH] Remove __devinitdata from notifier block definitions\n\nFew of the notifier_chain_register() callers use __devinitdata in the\ndefinition of notifier_block data structure. It is incorrect as the\ndata structure should be available after the initializations (they do\nnot unregister them during initializations).\n\nThis was leading to an oops when notifier_chain_register() call is\ninvoked for those callback chains after initialization.\n\nThis patch fixes all such usages to _not_ have the notifier_block data\nstructure in the init data section.\n\nSigned-off-by: Chandra Seetharaman \u003csekharan@us.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "caa9ee771de3195ae85ac6f8cb550f53e9ecdd82", "tree": "8aa692f337e071718e698baefc631b58b446beff", "parents": [ "cba9f33d13a8ca3125b2a30abe2425ce562d8a83" ], "author": { "name": "Oleg Nesterov", "email": "oleg@tv-sign.ru", "time": "Fri Mar 24 03:15:50 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Mar 24 07:33:20 2006 -0800" }, "message": "[PATCH] rcu_process_callbacks: don\u0027t cli() while testing -\u003enxtlist\n\n__rcu_process_callbacks() disables interrupts to protect itself from\ncall_rcu() which adds new entries to -\u003enxtlist.\n\nHowever we can check \"-\u003enxtlist !\u003d NULL\" with interrupts enabled, we can\u0027t\nget \"false positives\" because call_rcu() can only change this condition\nfrom 0 to 1.\n\nTested with rcutorture.ko.\n\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nAcked-by: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "2178426d26661ed6e18a8d6ea0bc05c98d73600d", "tree": "4c9635610e9ca52a06b169ac55c77abe1d4449d2", "parents": [ "7a673c6b8fff4b2888ef1d47462e4be79936ac5a" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Thu Mar 23 03:01:00 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Mar 23 07:38:17 2006 -0800" }, "message": "[PATCH] kernel/rcupdate.c: make two structs static\n\nThis patch makes two needlessly global structs static.\n\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "9331b3157c835353dd28efcd80d23563ad226aee", "tree": "dc198c77bdf8ba9aabf51841aad59934e922ba06", "parents": [ "3d3f26a7baaa921a0e790b4c72d20f0de91a5d65" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Mar 23 03:00:19 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Mar 23 07:38:10 2006 -0800" }, "message": "[PATCH] convert kernel/rcupdate.c:rcu_barrier_sema to mutex\n\nConvert kernel/rcupdate\u0027s rcu_barrier_sema to mutex.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nAcked-by: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "01ca70dca5c64cb774a8ac2f50bddff21d60169f", "tree": "7bb09a9f7b0ce1263af943c2beeb10e64a3b9ebe", "parents": [ "9f28bb7e1d0188a993403ab39b774785892805e1" ], "author": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Mon Mar 20 13:17:13 2006 -0800" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Mon Mar 20 13:42:58 2006 -0800" }, "message": "[PATCH] add EXPORT_SYMBOL_GPL_FUTURE() to RCU subsystem\n\nAs the RCU symbols are going to be changed to GPL in the near future,\nlets warn users that this is going to happen.\n\nCc: Paul McKenney \u003cpaulmck@us.ibm.com\u003e\nAcked-by: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n" }, { "commit": "21a1ea9eb40411d4ee29448c53b9e4c0654d6ceb", "tree": "86e4b681858ac562c953bd3ea3c038defd8ec4f4", "parents": [ "e2bab3d92486fb781f4d06f56339264ed1492392" ], "author": { "name": "Dipankar Sarma", "email": "dipankar@in.ibm.com", "time": "Tue Mar 07 21:55:33 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Mar 08 14:14:01 2006 -0800" }, "message": "[PATCH] rcu batch tuning\n\nThis patch adds new tunables for RCU queue and finished batches. There are\ntwo types of controls - number of completed RCU updates invoked in a batch\n(blimit) and monitoring for high rate of incoming RCUs on a cpu (qhimark,\nqlowmark).\n\nBy default, the per-cpu batch limit is set to a small value. If the input\nRCU rate exceeds the high watermark, we do two things - force quiescent\nstate on all cpus and set the batch limit of the CPU to INTMAX. Setting\nbatch limit to INTMAX forces all finished RCUs to be processed in one shot.\n If we have more than INTMAX RCUs queued up, then we have bigger problems\nanyway. Once the incoming queued RCUs fall below the low watermark, the\nbatch limit is set to the default.\n\nSigned-off-by: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a9c828155ae8d1a1576f9648cc4d9677aea53f89", "tree": "7b087188579ff897332a767af1ff695ab5bc116f", "parents": [ "69a0b3157983925f14fe0bdc49622d5389538d8d" ], "author": { "name": "Oleg Nesterov", "email": "oleg@tv-sign.ru", "time": "Tue Jan 10 17:24:53 2006 +0300" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Jan 10 08:49:47 2006 -0800" }, "message": "[PATCH] rcu: fix hotplug-cpu -\u003edonelist leak\n\nPointed out by Srivatsa Vaddagiri \u003cvatsa@in.ibm.com\u003e.\n\nrcu_do_batch() stops after processing maxbatch callbacks\non -\u003edonelist leaving rcu_tasklet in TASKLET_STATE_SCHED\nstate.\n\nIf CPU_DEAD event happens remaining -\u003edonelist entries are\nlost, rcu_offline_cpu() kills this tasklet.\n\nWith this patch -\u003edonelist migrates along with -\u003ecurlist\nand -\u003enxtlist to the current cpu.\n\nCompile tested.\n\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nAcked-by: Paul E. McKenney \u003cpaulmck@us.ibm.com\u003e\nCc: Srivatsa Vaddagiri \u003cvatsa@in.ibm.com\u003e\nCc: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "69a0b3157983925f14fe0bdc49622d5389538d8d", "tree": "d77b406001d01b0a200c9f713d8287a2ec42ae58", "parents": [ "c0400dc507a4345357fc25f13e8ac929287688a8" ], "author": { "name": "Oleg Nesterov", "email": "oleg@tv-sign.ru", "time": "Tue Jan 10 16:48:02 2006 +0300" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Jan 10 08:42:50 2006 -0800" }, "message": "[PATCH] rcu: join rcu_ctrlblk and rcu_state\n\nThis patch moves rcu_state into the rcu_ctrlblk. I think there\nare no reasons why we should have 2 different variables to control\nrcu state. Every user of rcu_state has also \"rcu_ctrlblk *rcp\" in\nthe parameter list.\n\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nAcked-by: Paul E. McKenney \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "dbc1651f0c5b7d13acc59d3b805a7224332fb1fb", "tree": "1e380afb42aa091d2acce50cd2cc10e368d1026a", "parents": [ "1fd5a46dd6bbca3a1275465120caf4748872c2a7" ], "author": { "name": "Oleg Nesterov", "email": "oleg@tv-sign.ru", "time": "Sun Jan 08 22:19:33 2006 +0300" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jan 09 17:01:39 2006 -0800" }, "message": "[PATCH] rcu: don\u0027t set -\u003enext_pending in rcu_start_batch()\n\nI think it is better to set -\u003enext_pending in the caller, when\nit is needed. This saves one parameter, and this coincides with\ncpu_quiet() beahaviour, which sets -\u003ecompleted \u003d -\u003ecur itself.\n\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nAcked-by: Paul E. McKenney \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "677517771b7b6efaf8617e70f655b16f3cafcc9b", "tree": "811f5df7b430cf865ac337f73c7aa2f67cb0bbac", "parents": [ "e2688f00dc0ceb9d9867434dffbd080411fc23b0" ], "author": { "name": "Oleg Nesterov", "email": "oleg@tv-sign.ru", "time": "Sun Jan 08 22:19:16 2006 +0300" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jan 09 09:35:44 2006 -0800" }, "message": "[PATCH] rcu: uninline __rcu_pending()\n\n__rcu_pending() is rather fat and called twice from rcu_pending().\n\nrcu_pending() has multiple callers, and not that small too.\n\nThis patch uninlines both of them.\n\nSigned-off-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nAcked-by: Paul E. McKenney \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "095975da26dba21698582e91e96be10f7417333f", "tree": "ce1ffac556d394ef56a18faa97d38f79b07f31e2", "parents": [ "a57004e1afb6ee03c509f1b1ec74a000682ab93b" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sun Jan 08 01:02:19 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Jan 08 20:13:48 2006 -0800" }, "message": "[PATCH] rcu file: use atomic primitives\n\nUse atomic_inc_not_zero for rcu files instead of special case rcuref.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "e56d090310d7625ecb43a1eeebd479f04affb48b", "tree": "2f479215dff4a2d8f3a9ed85200a5bc4f51534be", "parents": [ "4369ef3c3e9d3bd9b879580678778f558d481e90" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Jan 08 01:01:37 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Jan 08 20:13:40 2006 -0800" }, "message": "[PATCH] RCU signal handling\n\nRCU tasklist_lock and RCU signal handling: send signals RCU-read-locked\ninstead of tasklist_lock read-locked. This is a scalability improvement on\nSMP and a preemption-latency improvement under PREEMPT_RCU.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nAcked-by: William Irwin \u003cwli@holomorphy.com\u003e\nCc: Roland McGrath \u003croland@redhat.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "22fc6eccbf4ce4eb6265e6ada7b50a7b9cc57d05", "tree": "3887dc6f1eeb658d773be037971b98d6f5fb3dd7", "parents": [ "6d524aed1f50b2b1d5b4ad5a4e2fe3f38106d0a6" ], "author": { "name": "Ravikiran G Thirumalai", "email": "kiran@scalex86.org", "time": "Sun Jan 08 01:01:27 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Jan 08 20:13:38 2006 -0800" }, "message": "[PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros\n\n____cacheline_maxaligned_in_smp is currently used to align critical structures\nand avoid false sharing. It uses per-arch L1_CACHE_SHIFT_MAX and people find\nL1_CACHE_SHIFT_MAX useless.\n\nHowever, we have been using ____cacheline_maxaligned_in_smp to align\nstructures on the internode cacheline size. As per Andi\u0027s suggestion,\nfollowing patch kills ____cacheline_maxaligned_in_smp and introduces\nINTERNODE_CACHE_SHIFT, which defaults to L1_CACHE_SHIFT for all arches.\nArches needing L3/Internode cacheline alignment can define\nINTERNODE_CACHE_SHIFT in the arch asm/cache.h. Patch replaces\n____cacheline_maxaligned_in_smp with ____cacheline_internodealigned_in_smp\n\nWith this patch, L1_CACHE_SHIFT_MAX can be killed\n\nSigned-off-by: Ravikiran Thirumalai \u003ckiran@scalex86.org\u003e\nSigned-off-by: Shai Fultheim \u003cshai@scalex86.org\u003e\nSigned-off-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "c3f5902325d3053986e7359f706581d8f032e72f", "tree": "1d56b7626b83556982eafad69c597b180c2ef62b", "parents": [ "89d46b8778f65223f732d82c0166e0abba20fb1e" ], "author": { "name": "Srivatsa Vaddagiri", "email": "vatsa@in.ibm.com", "time": "Mon Dec 12 00:37:07 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Dec 12 08:57:42 2005 -0800" }, "message": "[PATCH] Fix RCU race in access of nohz_cpu_mask\n\nAccessing nohz_cpu_mask before incrementing rcp-\u003ecur is racy. It can cause\ntickless idle CPUs to be included in rsp-\u003ecpumask, which will extend\ngraceperiods unnecessarily.\n\nFix this race. It has been tested using extensions to RCU torture module\nthat forces various CPUs to become idle.\n\nSigned-off-by: Srivatsa Vaddagiri \u003cvatsa@in.ibm.com\u003e\nCc: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "ab4720ec76b756e1f8705e207a7b392b0453afd6", "tree": "1c4235ec8ac0e8e7f75a6f97ea6169e93647004f", "parents": [ "85b872424984e79519be904e7df02a91ba0a9486" ], "author": { "name": "Dipankar Sarma", "email": "dipankar@in.ibm.com", "time": "Mon Dec 12 00:37:05 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Dec 12 08:57:42 2005 -0800" }, "message": "[PATCH] add rcu_barrier() synchronization point\n\nThis introduces a new interface - rcu_barrier() which waits until all\nthe RCUs queued until this call have been completed.\n\nReiser4 needs this, because we do more than just freeing memory object\nin our RCU callback: we also remove it from the list hanging off\nsuper-block. This means, that before freeing reiser4-specific portion\nof super-block (during umount) we have to wait until all pending RCU\ncallbacks are executed.\n\nThe only change of reiser4 made to the original patch, is exporting of\nrcu_barrier().\n\nCc: Hans Reiser \u003creiser@namesys.com\u003e\nCc: Vladimir V. Saveliev \u003cvs@namesys.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a241ec65aeac3d69a08a7b153cccbdb7ea35063f", "tree": "e96585e8b1e699f31bad1fa61f34d2ec7c3a187c", "parents": [ "b3099b48da23686d8378133b0264ee00385ee5fa" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@us.ibm.com", "time": "Sun Oct 30 15:03:12 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Oct 30 17:37:27 2005 -0800" }, "message": "[PATCH] RCU torture-testing kernel module\n\nThis patch is a rewrite of the one submitted on October 1st, using modules\n(http://marc.theaimsgroup.com/?l\u003dlinux-kernel\u0026m\u003d112819093522998\u0026w\u003d2).\n\nThis rewrite adds a tristate CONFIG_RCU_TORTURE_TEST, which enables an\nintense torture test of the RCU infratructure. This is needed due to the\ncontinued changes to the RCU infrastructure to accommodate dynamic ticks,\nCPU hotplug, realtime, and so on. Most of the code is in a separate file\nthat is compiled only if the CONFIG variable is set. Documentation on how\nto run the test and interpret the output is also included.\n\nThis code has been tested on i386 and ppc64, and an earlier version of the\ncode has received extensive testing on a number of architectures as part of\nthe PREEMPT_RT patchset.\n\nSigned-off-by: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "5ee832dbc6770135ec8d63296af0a4374557bb79", "tree": "80ffdc157100df18f1c18d39f5036a9b798f2c06", "parents": [ "cc675230a9ca17010694bc8bd3c69ca9adf2efef" ], "author": { "name": "Eric Dumazet", "email": "dada1@cosmosbay.com", "time": "Mon Oct 17 20:01:21 2005 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Oct 17 15:27:58 2005 -0700" }, "message": "[PATCH] rcu: keep rcu callback event counter\n\nThis makes call_rcu() keep track of how many events there are on the RCU\nlist, and cause a reschedule event when the list gets too long.\n\nThis helps keep RCU event lists down.\n\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "2cc78eb52bc1ae89f0a4fa5a00eb998dffde4a9f", "tree": "27422cfcf8f403e5aa25e98148c225dbedb027c5", "parents": [ "de21eb63add932c61e018d20a760dcaed8c3e40c" ], "author": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Oct 17 09:10:15 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Oct 17 09:10:15 2005 -0700" }, "message": "Increase default RCU batching sharply\n\nDipankar made RCU limit the batch size to improve latency, but that\napproach is unworkable: it can cause the RCU queues to grow without\nbounds, since the batch limiter ended up limiting the callbacks.\n\nSo make the limit much higher, and start planning on instead limiting\nthe batch size by doing RCU callbacks more often if the queue looks like\nit might be growing too long.\n\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "c0dfb2905126e9e94edebbce8d3e05001301f52d", "tree": "db31f15f7e5dea0c812992c2ca87a1151507ed9c", "parents": [ "8b6490e5faafb3a16ea45654fb55f9ff086f1495" ], "author": { "name": "Dipankar Sarma", "email": "dipankar@in.ibm.com", "time": "Fri Sep 09 13:04:09 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Sep 09 13:57:54 2005 -0700" }, "message": "[PATCH] files: rcuref APIs\n\nAdds a set of primitives to do reference counting for objects that are looked\nup without locks using RCU.\n\nSigned-off-by: Ravikiran Thirumalai \u003ckiran_th@gmail.com\u003e\nSigned-off-by: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "9b06e818985d139fd9e82c28297f7744e1b484e1", "tree": "3cd2ba33b22fc2812f714f86ea52c68704f8e2c3", "parents": [ "512345be2549308b8ae8e85a3ff7f6d56a38e5f6" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@us.ibm.com", "time": "Sun May 01 08:59:04 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sun May 01 08:59:04 2005 -0700" }, "message": "[PATCH] Deprecate synchronize_kernel, GPL replacement\n\nThe synchronize_kernel() primitive is used for quite a few different purposes:\nwaiting for RCU readers, waiting for NMIs, waiting for interrupts, and so on.\nThis makes RCU code harder to read, since synchronize_kernel() might or might\nnot have matching rcu_read_lock()s. This patch creates a new\nsynchronize_rcu() that is to be used for RCU readers and a new\nsynchronize_sched() that is used for the rest. These two new primitives\ncurrently have the same implementation, but this is might well change with\nadditional real-time support. Both new primitives are GPL-only, the old\nprimitive is deprecated.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "66cf8f1443301a1d5bc9c21709e4264e6919a3e1", "tree": "2acfef65040c2fab1099b04f747921df600b4080", "parents": [ "f246315e1ab96c40978777d1e159820ecca45aa8" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@us.ibm.com", "time": "Sun May 01 08:59:03 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sun May 01 08:59:03 2005 -0700" }, "message": "[PATCH] kernel/rcupdate.c: make the exports EXPORT_SYMBOL_GPL\n\nThe gpl exports need to be put back. Moving them to GPL -- but in a\nmeasured manner, as I proposed on this list some months ago -- is fine.\nChanging these particular exports precipitously is most definitely -not-\nfine. Here is my earlier proposal:\n\n\thttp://marc.theaimsgroup.com/?l\u003dlinux-kernel\u0026m\u003d110520930301813\u0026w\u003d2\n\nSee below for a patch that puts the exports back, along with an updated\nversion of my earlier patch that starts the process of moving them to GPL.\nI will also be following this message with RFC patches that introduce two\n(EXPORT_SYMBOL_GPL) interfaces to replace synchronize_kernel(), which then\nbecomes deprecated.\n\nSigned-off-by: \u003cpaulmck@us.ibm.com\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" } ] }