)]}' { "log": [ { "commit": "9e506f7adce8e6165a104d3d78fddd8ff0cdccf8", "tree": "9ddfd67eec7e8a7dc73fb0ced97cc06e54a35c63", "parents": [ "94b3dd0f7bb393d93e84a173b1df9b8b64c83ac4" ], "author": { "name": "Akinobu Mita", "email": "akinobu.mita@gmail.com", "time": "Fri Jun 04 14:15:04 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jun 04 15:21:45 2010 -0700" }, "message": "kernel/: fix BUG_ON checks for cpu notifier callbacks direct call\n\nThe commit 80b5184cc537718122e036afe7e62d202b70d077 (\"kernel/: convert cpu\nnotifier to return encapsulate errno value\") changed the return value of\ncpu notifier callbacks.\n\nThose callbacks don\u0027t return NOTIFY_BAD on failures anymore. But there\nare a few callbacks which are called directly at init time and checking\nthe return value.\n\nI forgot to change BUG_ON checking by the direct callers in the commit.\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@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": "80b5184cc537718122e036afe7e62d202b70d077", "tree": "d4e2b400f0e951156d64d546fd563fa5a8ab02d3", "parents": [ "ad84bb5b98bf81deae97e3bcd814675d6b4e6f72" ], "author": { "name": "Akinobu Mita", "email": "akinobu.mita@gmail.com", "time": "Wed May 26 14:43:32 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 27 09:12:48 2010 -0700" }, "message": "kernel/: convert cpu notifier to return encapsulate errno value\n\nBy the previous modification, the cpu notifier can return encapsulate\nerrno value. This converts the cpu notifiers for kernel/*.c\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "25502a6c13745f4650cc59322bd198194f55e796", "tree": "d76cc659d3ea797c5da4630e219ac363d17c44a6", "parents": [ "99652b54de1ee094236f7171485214071af4ef31" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Apr 01 17:37:01 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 10 11:08:33 2010 -0700" }, "message": "rcu: refactor RCU\u0027s context-switch handling\n\nThe addition of preemptible RCU to treercu resulted in a bit of\nconfusion and inefficiency surrounding the handling of context switches\nfor RCU-sched and for RCU-preempt. For RCU-sched, a context switch\nis a quiescent state, pure and simple, just like it always has been.\nFor RCU-preempt, a context switch is in no way a quiescent state, but\nspecial handling is required when a task blocks in an RCU read-side\ncritical section.\n\nHowever, the callout from the scheduler and the outer loop in ksoftirqd\nstill calls something named rcu_sched_qs(), whose name is no longer\naccurate. Furthermore, when rcu_check_callbacks() notes an RCU-sched\nquiescent state, it ends up unnecessarily (though harmlessly, aside\nfrom the performance hit) enqueuing the current task if it happens to\nbe running in an RCU-preempt read-side critical section. This not only\nincreases the maximum latency of scheduler_tick(), it also needlessly\nincreases the overhead of the next outermost rcu_read_unlock() invocation.\n\nThis patch addresses this situation by separating the notion of RCU\u0027s\ncontext-switch handling from that of RCU-sched\u0027s quiescent states.\nThe context-switch handling is covered by rcu_note_context_switch() in\ngeneral and by rcu_preempt_note_context_switch() for preemptible RCU.\nThis permits rcu_sched_qs() to handle quiescent states and only quiescent\nstates. It also reduces the maximum latency of scheduler_tick(), though\nprobably by much less than a microsecond. Finally, it means that tasks\nwithin preemptible-RCU read-side critical sections avoid incurring the\noverhead of queuing unless there really is a context switch.\n\nSuggested-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nAcked-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\n" }, { "commit": "b9c3032277f756e73f6c673419dc414155e04e46", "tree": "1727289fff4ea4fdcd93658d07e20ab53b55af96", "parents": [ "c80d292f137275a1ed88e6ed515ecb457051f1a4" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Feb 03 18:08:52 2010 +0100" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Wed Feb 03 18:17:40 2010 +0100" }, "message": "hrtimer, softirq: Fix hrtimer-\u003esoftirq trampoline\n\nhrtimers callbacks are always done from hardirq context, either the\njiffy tick interrupt or the hrtimer device interrupt.\n\n[ there is currently one exception that can still call a hrtimer\n callback from softirq, but even in that case this will still\n work correctly. ]\n\nReported-by: Wei Yongjun \u003cyjwei@cn.fujitsu.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Yury Polyanskiy \u003cypolyans@princeton.edu\u003e\nTested-by: Wei Yongjun \u003cyjwei@cn.fujitsu.com\u003e\nAcked-by: David S. Miller \u003cdavem@davemloft.net\u003e\nLKML-Reference: \u003c1265120401.24455.306.camel@laptop\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "d0316554d3586cbea60592a41391b5def2553d6f", "tree": "5e7418f0bacbc68cec5dfd1541e03eb56870aa02", "parents": [ "fb0bbb92d42d5bd0ab224605444efdfed06d6934", "51e99be00ce2713cbb841cedc997cafa6e26c7f4" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Dec 14 09:58:24 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Dec 14 09:58:24 2009 -0800" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (34 commits)\n m68k: rename global variable vmalloc_end to m68k_vmalloc_end\n percpu: add missing per_cpu_ptr_to_phys() definition for UP\n percpu: Fix kdump failure if booted with percpu_alloc\u003dpage\n percpu: make misc percpu symbols unique\n percpu: make percpu symbols in ia64 unique\n percpu: make percpu symbols in powerpc unique\n percpu: make percpu symbols in x86 unique\n percpu: make percpu symbols in xen unique\n percpu: make percpu symbols in cpufreq unique\n percpu: make percpu symbols in oprofile unique\n percpu: make percpu symbols in tracer unique\n percpu: make percpu symbols under kernel/ and mm/ unique\n percpu: remove some sparse warnings\n percpu: make alloc_percpu() handle array types\n vmalloc: fix use of non-existent percpu variable in put_cpu_var()\n this_cpu: Use this_cpu_xx in trace_functions_graph.c\n this_cpu: Use this_cpu_xx for ftrace\n this_cpu: Use this_cpu_xx in nmi handling\n this_cpu: Use this_cpu operations in RCU\n this_cpu: Use this_cpu ops for VM statistics\n ...\n\nFix up trivial (famous last words) global per-cpu naming conflicts in\n\tarch/x86/kvm/svm.c\n\tmm/slab.c\n" }, { "commit": "c5e0cb3ddc5f14cedcfc50c0fb3b5fc6b56576da", "tree": "ab4d9ccc68fcdca681c2991fa3773d7483a7f26b", "parents": [ "2c28e2451dba2260e9f88811b29a7787db7e7616" ], "author": { "name": "Lai Jiangshan", "email": "laijs@cn.fujitsu.com", "time": "Wed Oct 28 08:14:48 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Nov 02 16:06:37 2009 +0100" }, "message": "rcu: Cleanup: balance rcu_irq_enter()/rcu_irq_exit() calls\n\nCurrently, rcu_irq_exit() is invoked only for CONFIG_NO_HZ,\nwhile rcu_irq_enter() is invoked unconditionally. This patch\nmoves rcu_irq_exit() out from under CONFIG_NO_HZ so that the\ncalls are balanced.\n\nThis patch has no effect on the behavior of the kernel because\nboth rcu_irq_enter() and rcu_irq_exit() are empty for\n!CONFIG_NO_HZ, but the code is easier to understand if the calls\nare obviously balanced in all cases.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.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: \u003c12567428891605-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "1871e52c76dd95895caeb772f845a1718dcbcd75", "tree": "49e8148326f65353e673204f427bd4545eb26c16", "parents": [ "0f5e4816dbf38ce9488e611ca2296925c1e90d5e" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Oct 29 22:34:13 2009 +0900" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Oct 29 22:34:13 2009 +0900" }, "message": "percpu: make percpu symbols under kernel/ and mm/ unique\n\nThis patch updates percpu related symbols under kernel/ and mm/ such\nthat percpu symbols are unique and don\u0027t clash with local symbols.\nThis serves two purposes of decreasing the possibility of global\npercpu symbol collision and allowing dropping per_cpu__ prefix from\npercpu symbols.\n\n* kernel/lockdep.c: s/lock_stats/cpu_lock_stats/\n\n* kernel/sched.c: s/init_rq_rt/init_rt_rq_var/\t(any better idea?)\n \t\t s/sched_group_cpus/sched_groups/\n\n* kernel/softirq.c: s/ksoftirqd/run_ksoftirqd/a\n\n* kernel/softlockup.c: s/(*)_timestamp/softlockup_\\1_ts/\n \t\t s/watchdog_task/softlockup_watchdog/\n\t\t s/timestamp/ts/ for local variables\n\n* kernel/time/timer_stats: s/lookup_lock/tstats_lookup_lock/\n\n* mm/slab.c: s/reap_work/slab_reap_work/\n \t s/reap_node/slab_reap_node/\n\n* mm/vmstat.c: local variable changed to avoid collision with vmstat_work\n\nPartly based on Rusty Russell\u0027s \"alloc_percpu: rename percpu vars\nwhich cause name clashes\" patch.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: (slab/vmstat) Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\n" }, { "commit": "5dd4de587fd9c25cb32a7a0fe9feec3647509b6f", "tree": "5c724508e4f9ae4f9f099e50551abf28c5d82e9f", "parents": [ "9a5963eb494c8a7be65199e15854551df7d2d939" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Thu Sep 17 17:38:32 2009 +0800" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Sep 17 15:53:44 2009 -0400" }, "message": "softirq: add BLOCK_IOPOLL to softirq_to_name\n\nWith BLOCK_IOPOLL_SOFTIRQ added, softirq_to_name[] and\nshow_softirq_name() needs to be updated.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nLKML-Reference: \u003c4AB20398.8070209@cn.fujitsu.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "d6714c22b43fbcbead7e7b706ff270e15f04a791", "tree": "1dc15e57d982351bed45b7b9768a118f86b88c19", "parents": [ "9f77da9f40045253e91f55c12d4481254b513d2d" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sat Aug 22 13:56:46 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Aug 23 10:32:37 2009 +0200" }, "message": "rcu: Renamings to increase RCU clarity\n\nMake RCU-sched, RCU-bh, and RCU-preempt be underlying\nimplementations, with \"RCU\" defined in terms of one of the\nthree. Update the outdated rcu_qsctr_inc() names, as these\nfunctions no longer increment anything.\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: josht@linux.vnet.ibm.com\nCc: dvhltc@us.ibm.com\nCc: niv@us.ibm.com\nCc: peterz@infradead.org\nCc: rostedt@goodmis.org\nLKML-Reference: \u003c12509746132696-git-send-email-\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "9ba5f005c994ad28e266a0cd14ef29354be382c9", "tree": "0a2ff570070afc18e7dad61a2955b94614ce9b51", "parents": [ "aea1f7964ae6cba5eb419a958956deb9016b3341" ], "author": { "name": "Peter Zijlstra", "email": "peterz@infradead.org", "time": "Wed Jul 22 14:18:35 2009 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Wed Jul 22 17:01:17 2009 +0200" }, "message": "softirq: introduce tasklet_hrtimer infrastructure\n\ncommit ca109491f (hrtimer: removing all ur callback modes) moved all\nhrtimer callbacks into hard interrupt context when high resolution\ntimers are active. That breaks code which relied on the assumption\nthat the callback happens in softirq context.\n\nProvide a generic infrastructure which combines tasklets and hrtimers\ntogether to provide an in-softirq hrtimer experience.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: torvalds@linux-foundation.org\nCc: kaber@trash.net\nCc: David Miller \u003cdavem@davemloft.net\u003e\nLKML-Reference: \u003c1248265724.27058.1366.camel@twins\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "aa0ce5bbc2dbb1853bd0c6d13f17716fcc38ac5a", "tree": "79efff8d1e52e3d1b968a5122447d25886ef29d7", "parents": [ "1d89b30cc9be41af87881682ec82e2c107849dbe" ], "author": { "name": "Keika Kobayashi", "email": "kobayashi.kk@ncos.nec.co.jp", "time": "Wed Jun 17 16:25:52 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jun 18 13:03:40 2009 -0700" }, "message": "softirq: introduce statistics for softirq\n\nStatistics for softirq doesn\u0027t exist.\nIt will be helpful like statistics for interrupts.\nThis patch introduces counting the number of softirq,\nwhich will be exported in /proc/softirqs.\n\nWhen softirq handler consumes much CPU time,\n/proc/stat is like the following.\n\n$ while :; do cat /proc/stat | head -n1 ; sleep 10 ; done\ncpu 88 0 408 739665 583 28 2 0 0\ncpu 450 0 1090 740970 594 28 1294 0 0\n ^^^^\n softirq\n\nIn such a situation,\n/proc/softirqs shows us which softirq handler is invoked.\nWe can see the increase rate of softirqs.\n\n\u003cbefore\u003e\n$ cat /proc/softirqs\n CPU0 CPU1 CPU2 CPU3\nHI 0 0 0 0\nTIMER 462850 462805 462782 462718\nNET_TX 0 0 0 365\nNET_RX 2472 2 2 40\nBLOCK 0 0 381 1164\nTASKLET 0 0 0 224\nSCHED 462654 462689 462698 462427\nRCU 3046 2423 3367 3173\n\n\u003cafter\u003e\n$ cat /proc/softirqs\n CPU0 CPU1 CPU2 CPU3\nHI 0 0 0 0\nTIMER 463361 465077 465056 464991\nNET_TX 53 0 1 365\nNET_RX 3757 2 2 40\nBLOCK 0 0 398 1170\nTASKLET 0 0 0 224\nSCHED 463074 464318 464612 463330\nRCU 3505 2948 3947 3673\n\nWhen CPU TIME of softirq is high,\nthe rates of increase is the following.\n TIMER : 220/sec : CPU1-3\n NET_TX : 5/sec : CPU0\n NET_RX : 120/sec : CPU0\n SCHED : 40-200/sec : all CPU\n RCU : 45-58/sec : all CPU\n\nThe rates of increase in an idle mode is the following.\n TIMER : 250/sec\n SCHED : 250/sec\n RCU : 2/sec\n\nIt seems many softirqs for receiving packets and rcu are invoked. This\ngives us help for checking system.\n\nSigned-off-by: Keika Kobayashi \u003ckobayashi.kk@ncos.nec.co.jp\u003e\nReviewed-by: Hiroshi Shimamoto \u003ch-shimamoto@ct.jp.nec.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Eric Dumazet \u003cdada1@cosmosbay.com\u003e\nCc: Alexey Dobriyan \u003cadobriyan@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": "7c692cbade8b8884f1c20500393bcc7cd6d24ef8", "tree": "2cf4353c684304dfdefb89e0a70bfbd7eeadf85b", "parents": [ "8eae985f08138758e06503588f5f1196269bc415" ], "author": { "name": "Vegard Nossum", "email": "vegard.nossum@gmail.com", "time": "Wed May 21 22:53:13 2008 +0200" }, "committer": { "name": "Vegard Nossum", "email": "vegard.nossum@gmail.com", "time": "Sat Jun 13 10:02:24 2009 +0200" }, "message": "tasklets: new tasklet scheduling function\n\nRationale: kmemcheck needs to be able to schedule a tasklet without\ntouching any dynamically allocated memory _at_ _all_ (since that would\nlead to a recursive page fault). This tasklet is used for writing the\nerror reports to the kernel log.\n\nThe new scheduling function avoids touching any other tasklets by\ninserting the new tasklist as the head of the \"tasklet_hi\" list instead\nof on the tail.\n\nAlso don\u0027t wake up the softirq thread lest the scheduler access some\ntracked memory and we go down with a recursive page fault.\n\nIn this case, we\u0027d better just wait for the maximum time of 1/HZ for the\nmessage to appear.\n\nSigned-off-by: Vegard Nossum \u003cvegard.nossum@gmail.com\u003e\n" }, { "commit": "862366118026a358882eefc70238dbcc3db37aac", "tree": "4eb62bc10327a5afac064a95a091ea05ecd2acc1", "parents": [ "57eee9ae7bbcfb692dc96c739a5184adb6349733", "511b01bdf64ad8a38414096eab283c7784aebfc4" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jun 10 19:53:40 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jun 10 19:53:40 2009 -0700" }, "message": "Merge branch \u0027tracing-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027tracing-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (244 commits)\n Revert \"x86, bts: reenable ptrace branch trace support\"\n tracing: do not translate event helper macros in print format\n ftrace/documentation: fix typo in function grapher name\n tracing/events: convert block trace points to TRACE_EVENT(), fix !CONFIG_BLOCK\n tracing: add protection around module events unload\n tracing: add trace_seq_vprint interface\n tracing: fix the block trace points print size\n tracing/events: convert block trace points to TRACE_EVENT()\n ring-buffer: fix ret in rb_add_time_stamp\n ring-buffer: pass in lockdep class key for reader_lock\n tracing: add annotation to what type of stack trace is recorded\n tracing: fix multiple use of __print_flags and __print_symbolic\n tracing/events: fix output format of user stack\n tracing/events: fix output format of kernel stack\n tracing/trace_stack: fix the number of entries in the header\n ring-buffer: discard timestamps that are at the start of the buffer\n ring-buffer: try to discard unneeded timestamps\n ring-buffer: fix bug in ring_buffer_discard_commit\n ftrace: do not profile functions when disabled\n tracing: make trace pipe recognize latency format flag\n ...\n" }, { "commit": "44347d947f628060b92449702071bfe1d31dfb75", "tree": "c6ed74610d5b3295df4296659f80f5feb94b28cc", "parents": [ "d94fc523f3c35bd8013f04827e94756cbc0212f4", "413f81eba35d6ede9289b0c8a920c013a84fac71" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu May 07 11:17:13 2009 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu May 07 11:17:34 2009 +0200" }, "message": "Merge branch \u0027linus\u0027 into tracing/core\n\nMerge reason: tracing/core was on a .30-rc1 base and was missing out on\n on a handful of tracing fixes present in .30-rc5-almost.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "a0e39ed378fb6ba916522764cd508fa7d42ad495", "tree": "e696fef3ec7daebb8861e002b3e7432a209baae4", "parents": [ "8b3725621074040d380664964ffbc40610aef8c6" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed Apr 29 13:51:39 2009 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Apr 29 14:06:21 2009 +0200" }, "message": "tracing: fix build failure on s390\n\n\"tracing: create automated trace defines\" causes this compile error on s390,\nas reported by Sachin Sant against linux-next:\n\n kernel/built-in.o: In function `__do_softirq\u0027:\n (.text+0x1c680): undefined reference to `__tracepoint_softirq_entry\u0027\n\nThis happens because the definitions of the softirq tracepoints were moved\nfrom kernel/softirq.c to kernel/irq/handle.c. Since s390 doesn\u0027t support\ngeneric hardirqs handle.c doesn\u0027t get compiled and the definitions are\nmissing.\n\nSo move the tracepoints to softirq.c again.\n\n[ Impact: fix build failure on s390 ]\n\nReported-by: Sachin Sant \u003csachinp@in.ibm.com\u003e\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: fweisbec@gmail.com\nLKML-Reference: \u003c20090429135139.5fac79b8@osiris.boeblingen.de.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "85ac16d033370caf6f48d743c8dc8103700f5cc5", "tree": "04a73af31c07a8ad29780b777b3f9d041fa236fa", "parents": [ "57b150cce8e004ddd36330490a68bfb59b7271e9" ], "author": { "name": "Yinghai Lu", "email": "yinghai@kernel.org", "time": "Mon Apr 27 18:00:38 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Apr 28 12:21:17 2009 +0200" }, "message": "x86/irq: change irq_desc_alloc() to take node instead of cpu\n\nThis simplifies the node awareness of the code. All our allocators\nonly deal with a NUMA node ID locality not with CPU ids anyway - so\nthere\u0027s no need to maintain (and transform) a CPU id all across the\nIRq layer.\n\nv2: keep move_irq_desc related\n\n[ Impact: cleanup, prepare IRQ code to be NUMA-aware ]\n\nSigned-off-by: Yinghai Lu \u003cyinghai@kernel.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Jeremy Fitzhardinge \u003cjeremy@goop.org\u003e\nLKML-Reference: \u003c49F65536.2020300@kernel.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "79d381c9f2354b594dcab9b04dfcc0debf7294fe", "tree": "e3b9264b52c443bfa7508850e1ca0c17271a1779", "parents": [ "ef631b0ca01655d24e9ca7e199262c4a46416a26" ], "author": { "name": "H Hartley Sweeten", "email": "hartleys@visionengravers.com", "time": "Thu Apr 16 19:30:18 2009 -0400" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Apr 17 01:57:54 2009 +0200" }, "message": "kernel/softirq.c: fix sparse warning\n\nFix sparse warning in kernel/softirq.c.\n\n warning: do-while statement is not a compound statement\n\nSigned-off-by: H Hartley Sweeten \u003chsweeten@visionengravers.com\u003e\nLKML-Reference: \u003cBD79186B4FD85F4B8E60E381CAEE1909015F9033@mi8nycmail19.Mi8.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "ad8d75fff811a6a230f7f43b05a6483099349533", "tree": "764f75c0785b29067b141719b6e8000f005da7fd", "parents": [ "ecda8ae02a08ef065ff387f5cb2a2d4999da2408" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Apr 14 19:39:12 2009 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Apr 14 22:05:43 2009 -0400" }, "message": "tracing/events: move trace point headers into include/trace/events\n\nImpact: clean up\n\nCreate a sub directory in include/trace called events to keep the\ntrace point headers in their own separate directory. Only headers that\ndeclare trace points should be defined in this directory.\n\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nCc: Zhao Lei \u003czhaolei@cn.fujitsu.com\u003e\nCc: Eduard - Gabriel Munteanu \u003ceduard.munteanu@linux360.ro\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "a8d154b009168337494fbf345671bab74d3e4b8b", "tree": "4097612e1a5cc8bf7658542f7d0f51b815113eaf", "parents": [ "ea20d9293ce423a39717ed4375393129a2e701f9" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri Apr 10 09:36:00 2009 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Apr 14 12:57:28 2009 -0400" }, "message": "tracing: create automated trace defines\n\nThis patch lowers the number of places a developer must modify to add\nnew tracepoints. The current method to add a new tracepoint\ninto an existing system is to write the trace point macro in the\ntrace header with one of the macros TRACE_EVENT, TRACE_FORMAT or\nDECLARE_TRACE, then they must add the same named item into the C file\nwith the macro DEFINE_TRACE(name) and then add the trace point.\n\nThis change cuts out the needing to add the DEFINE_TRACE(name).\nEvery file that uses the tracepoint must still include the trace/\u003ctype\u003e.h\nfile, but the one C file must also add a define before the including\nof that file.\n\n #define CREATE_TRACE_POINTS\n #include \u003ctrace/mytrace.h\u003e\n\nThis will cause the trace/mytrace.h file to also produce the C code\nnecessary to implement the trace point.\n\nNote, if more than one trace/\u003ctype\u003e.h is used to create the C code\nit is best to list them all together.\n\n #define CREATE_TRACE_POINTS\n #include \u003ctrace/foo.h\u003e\n #include \u003ctrace/bar.h\u003e\n #include \u003ctrace/fido.h\u003e\n\nThanks to Mathieu Desnoyers and Christoph Hellwig for coming up with\nthe cleaner solution of the define above the includes over my first\ndesign to have the C code include a \"special\" header.\n\nThis patch converts sched, irq and lockdep and skb to use this new\nmethod.\n\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nCc: Zhao Lei \u003czhaolei@cn.fujitsu.com\u003e\nCc: Eduard - Gabriel Munteanu \u003ceduard.munteanu@linux360.ro\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "609862be074cc20e007c640fd936ffe798b41abc", "tree": "2ebcacf036fce1b075fe267f608b6abe3f196c67", "parents": [ "12fe32e4f942ac5c71a4ab70b039fee65c0dc29d", "eedeeabdeeadb016b8c783e3620d06b98d0cb4e1" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 06 13:37:30 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 06 13:37:30 2009 -0700" }, "message": "Merge branch \u0027locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n lockdep: add stack dumps to asserts\n hrtimer: fix rq-\u003elock inversion (again)\n" }, { "commit": "714f83d5d9f7c785f622259dad1f4fad12d64664", "tree": "20563541ae438e11d686b4d629074eb002a481b7", "parents": [ "8901e7ffc2fa78ede7ce9826dbad68a3a25dc2dc", "645dae969c3b8651c5bc7c54a1835ec03820f85f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Apr 05 11:04:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Apr 05 11:04:19 2009 -0700" }, "message": "Merge branch \u0027tracing-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027tracing-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (413 commits)\n tracing, net: fix net tree and tracing tree merge interaction\n tracing, powerpc: fix powerpc tree and tracing tree interaction\n ring-buffer: do not remove reader page from list on ring buffer free\n function-graph: allow unregistering twice\n trace: make argument \u0027mem\u0027 of trace_seq_putmem() const\n tracing: add missing \u0027extern\u0027 keywords to trace_output.h\n tracing: provide trace_seq_reserve()\n blktrace: print out BLK_TN_MESSAGE properly\n blktrace: extract duplidate code\n blktrace: fix memory leak when freeing struct blk_io_trace\n blktrace: fix blk_probes_ref chaos\n blktrace: make classic output more classic\n blktrace: fix off-by-one bug\n blktrace: fix the original blktrace\n blktrace: fix a race when creating blk_tree_root in debugfs\n blktrace: fix timestamp in binary output\n tracing, Text Edit Lock: cleanup\n tracing: filter fix for TRACE_EVENT_FORMAT events\n ftrace: Using FTRACE_WARN_ON() to check \"freed record\" in ftrace_release()\n x86: kretprobe-booster interrupt emulation code fix\n ...\n\nFix up trivial conflicts in\n arch/parisc/include/asm/ftrace.h\n include/linux/memory.h\n kernel/extable.c\n kernel/module.c\n" }, { "commit": "b1dbb67911fecb290db3f566281bcd9ccc9dc6df", "tree": "f55add06f624f7fed8a68372d8c96b583ca578fe", "parents": [ "492f59f526d95e73028f57bff475b4bbe3c8cb72", "70f454408e68fdba2c2529ab7d6ec3c3525e59f2" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 17:33:30 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 17:33:30 2009 -0700" }, "message": "Merge branch \u0027ipi-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027ipi-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n s390: remove arch specific smp_send_stop()\n panic: clean up kernel/panic.c\n panic, smp: provide smp_send_stop() wrapper on UP too\n panic: decrease oops_in_progress only after having done the panic\n generic-ipi: eliminate WARN_ON()s during oops/panic\n generic-ipi: cleanups\n generic-ipi: remove CSD_FLAG_WAIT\n generic-ipi: remove kmalloc()\n generic IPI: simplify barriers and locking\n" }, { "commit": "7f1e2ca9f04b02794597f60e7b1d43f0a1317939", "tree": "dad1d80ab4232f3ca12d7ff9a58f0dc76133dab1", "parents": [ "7bee946358c3cb957d4aa648fc5ab3cad0b232d0" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Mar 13 12:21:27 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 31 14:52:52 2009 +0200" }, "message": "hrtimer: fix rq-\u003elock inversion (again)\n\nIt appears I inadvertly introduced rq-\u003elock recursion to the\nhrtimer_start() path when I delegated running already expired\ntimers to softirq context.\n\nThis patch fixes it by introducing a __hrtimer_start_range_ns()\nmethod that will not use raise_softirq_irqoff() but\n__raise_softirq_irqoff() which avoids the wakeup.\n\nIt then also changes schedule() to check for pending softirqs and\ndo the wakeup then, I\u0027m not quite sure I like this last bit, nor\nam I convinced its really needed.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus@samba.org\nLKML-Reference: \u003c20090313112301.096138802@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "7bee946358c3cb957d4aa648fc5ab3cad0b232d0", "tree": "693061ebde2abc35ecc846e5084630d7225aaaff", "parents": [ "d820ac4c2fa881079e6b689d2098adce337558ae", "15f7176eb1cccec0a332541285ee752b935c1c85" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 31 13:53:43 2009 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 31 13:53:43 2009 +0200" }, "message": "Merge branch \u0027linus\u0027 into locking-for-linus\n\nConflicts:\n\tlib/Kconfig.debug\n" }, { "commit": "6e15cf04860074ad032e88c306bea656bbdd0f22", "tree": "c346383bb7563e8d66b2f4a502f875b259c34870", "parents": [ "be0ea69674ed95e1e98cb3687a241badc756d228", "60db56422043aaa455ac7f858ce23c273220f9d9" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Mar 26 21:39:17 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 27 17:28:43 2009 +0100" }, "message": "Merge branch \u0027core/percpu\u0027 into percpu-cpumask-x86-for-linus-2\n\nConflicts:\n\tarch/parisc/kernel/irq.c\n\tarch/x86/include/asm/fixmap_64.h\n\tarch/x86/include/asm/setup.h\n\tkernel/irq/handle.c\n\nSemantic merge:\n arch/x86/include/asm/fixmap.h\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "cd80a8142efa3468c2cd9fb52845f334c3220d54", "tree": "919e88994bd3c09b34ce852d0a09bb0655d231d0", "parents": [ "641cd4cfcdc71ce01535b31cc4d57d59a1fae1fc", "a98fe7f3425c6b4e90de16f8da63b0429a8fed08" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 13 11:05:58 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 13 11:05:58 2009 +0100" }, "message": "Merge branch \u0027x86/core\u0027 into core/ipi\n" }, { "commit": "899039e8746bb9a09b6487ddb8ab2275ce9d0256", "tree": "4bc6365d81796fb675c4fe0fde243e11fd9cb361", "parents": [ "7f96f93f02b7637491a1637dee12dcdcd40b9802" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri Mar 13 00:43:33 2009 -0400" }, "committer": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri Mar 13 00:43:33 2009 -0400" }, "message": "softirq: no need to have SOFTIRQ in softirq name\n\nImpact: clean up\n\nIt is redundant to have \u0027SOFTIRQ\u0027 in the softirq names.\n\nReported-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n" }, { "commit": "39842323ceb368d2ea36ab7696aedbe296e13b61", "tree": "6050a0e282eaaf500f3809b1e53256b24b570d92", "parents": [ "5d592b44b29a1d73e13d5c9e3426eed843bdc359" ], "author": { "name": "Jason Baron", "email": "jbaron@redhat.com", "time": "Thu Mar 12 14:36:03 2009 -0400" }, "committer": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Mar 12 21:20:58 2009 -0400" }, "message": "tracing: tracepoints for softirq entry/exit - tracepoints\n\nIntroduce softirq entry/exit tracepoints. These are useful for\naugmenting existing tracers, and to figure out softirq frequencies and\ntimings.\n\n[\n s/irq_softirq_/softirq_/ for trace point names and\n Fixed printf format in TRACE_FORMAT macro\n - Steven Rostedt\n]\n\nLKML-Reference: \u003c20090312183603.GC3352@redhat.com\u003e\nSigned-off-by: Jason Baron \u003cjbaron@redhat.com\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n" }, { "commit": "5d592b44b29a1d73e13d5c9e3426eed843bdc359", "tree": "e26ec625e6fb5efdbbf41d0bba940a2dbac19f50", "parents": [ "e447e1df2e568cd43d1918963c9f09fae85aea57" ], "author": { "name": "Jason Baron", "email": "jbaron@redhat.com", "time": "Thu Mar 12 14:33:36 2009 -0400" }, "committer": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Mar 12 21:15:02 2009 -0400" }, "message": "tracing: tracepoints for softirq entry/exit - add softirq-to-name array\n\nCreate a \u0027softirq_to_name\u0027 array, which is indexed by softirq #, so\nthat we can easily convert between the softirq index # and its name, in\norder to get more meaningful output messages.\n\nLKML-Reference: \u003c20090312183336.GB3352@redhat.com\u003e\nSigned-off-by: Jason Baron \u003cjbaron@redhat.com\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n" }, { "commit": "25d500067d5a666d1336598d1b324793554e5496", "tree": "3402308c4c69a66d02ce55f5c165e242fad2a8a9", "parents": [ "0b13fda1e0936b3d64c4c407f183d33fa6bd2ad4", "9ead64974b05501bbac0d63a47c99fa786d064ba" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 13 02:14:25 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 13 02:14:25 2009 +0100" }, "message": "Merge branch \u0027linus\u0027 into core/ipi\n" }, { "commit": "480c93df5b99699390f93a7024c9f60d09da0e96", "tree": "b93b6c8c71c5f2e716dd05b126e01ef4e20ff0af", "parents": [ "aecfcde920da8d32949f6cbbc1fc051b4ef9e7be", "d820ac4c2fa881079e6b689d2098adce337558ae" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 13 01:33:21 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 13 01:33:21 2009 +0100" }, "message": "Merge branch \u0027core/locking\u0027 into tracing/ftrace\n" }, { "commit": "d820ac4c2fa881079e6b689d2098adce337558ae", "tree": "39e4e989d22271cd401f6974c9ae7accc571d500", "parents": [ "3c1f67d60e2b4f4455563928999fd41cc653645d" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 13 01:30:40 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 13 01:32:36 2009 +0100" }, "message": "locking: rename trace_softirq_[enter|exit] \u003d\u003e lockdep_softirq_[enter|exit]\n\nImpact: cleanup\n\nThe naming clashes with upcoming softirq tracepoints, so rename the\nAPIs to lockdep_*().\n\nRequested-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "12e87e36e0141c08dbc8b2177c93c75fb18ad7e5", "tree": "a82ac66b372ddc7ee97fe095222232875b6737d4", "parents": [ "42b40b3d55f5782b00b74d9105c3565fbfa5cb80", "c3ffc7a40b7e94b094efe1c8ab4e24370a782b65", "7bffc23e56e92c14b787bf4d95249a32085bfed5", "7a203f3b089be4410fe065dd9927027eade94557" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 10 09:56:25 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 10 09:56:25 2009 +0100" }, "message": "Merge branches \u0027tracing/doc\u0027, \u0027tracing/ftrace\u0027, \u0027tracing/printk\u0027 and \u0027linus\u0027 into tracing/core\n" }, { "commit": "467c88fee51e2ae862e9485245687da0730e29aa", "tree": "244aa2469e31cb53d7e04ec0768b506ccad71932", "parents": [ "1f442d70c84aa798e243e721eba728a98434cd86", "7ab152470e8416ef2a44c800fdc157e2192f2974", "8827247ffcc9e880cbe4705655065cf011265157", "d1a8e7792047f7dca7eb5759250e2c12800bf262", "0feca851c1b3cb4ebfa3149144b3d5de0879ebaa", "d0fc63f7bd07cb779a06dc1cdd0c5a14e7f5d562", "7a203f3b089be4410fe065dd9927027eade94557", "3a450de1365d20afde406f0d9b2931a5e4a4fd6a" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 10 09:26:38 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 10 09:26:38 2009 +0100" }, "message": "Merge branches \u0027x86/apic\u0027, \u0027x86/asm\u0027, \u0027x86/fixmap\u0027, \u0027x86/memtest\u0027, \u0027x86/mm\u0027, \u0027x86/urgent\u0027, \u0027linus\u0027 and \u0027core/percpu\u0027 into x86/core\n" }, { "commit": "f0ef03985130287c6c84ebe69416cf790e6cc00e", "tree": "3ecb04cc4d82e5fc3ae5f1747e6da172ae8cbcb7", "parents": [ "16097439703bcd38e9fe5608c12add6dacb825ea", "31bbed527e7039203920c51c9fb48c27aed0820c" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 06 16:44:14 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 06 16:45:01 2009 +0100" }, "message": "Merge branch \u0027x86/core\u0027 into tracing/textedit\n\nConflicts:\n\tarch/x86/Kconfig\n\tblock/blktrace.c\n\tkernel/irq/handle.c\n\nSemantic conflict:\n\tkernel/trace/blktrace.c\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "64ca5ab913f1594ef316556e65f5eae63ff50cee", "tree": "44cecee89609fbec9e4d7ed853b0eaf5c3782fc3", "parents": [ "559595a985e106d2fa9f0c79b7f5805453fed593" ], "author": { "name": "Eric Dumazet", "email": "dada1@cosmosbay.com", "time": "Wed Mar 04 12:11:56 2009 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Mar 04 22:08:45 2009 +0100" }, "message": "rcu: increment quiescent state counter in ksoftirqd()\n\nIf a machine is flooded by network frames, a cpu can loop\n100% of its time inside ksoftirqd() without calling schedule().\nThis can delay RCU grace period to insane values.\n\nAdding rcu_qsctr_inc() call in ksoftirqd() solves this problem.\n\nPaul: \"This regression was a result of the recent change from\n\"schedule()\" to \"cond_resched()\", which got rid of that quiescent\nstate in the common case where a reschedule is not needed\".\n\nSigned-off-by: Eric Dumazet \u003cdada1@cosmosbay.com\u003e\nReviewed-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "6e2756376c706e4da3454a272947983f92e80a7e", "tree": "3a54c5dd97921ae869bb6122a69af42d9161ee3e", "parents": [ "8969a5ede0f9e17da4b943712429aef2c9bcd82b" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Feb 25 13:59:48 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Feb 25 14:13:44 2009 +0100" }, "message": "generic-ipi: remove CSD_FLAG_WAIT\n\nOleg noticed that we don\u0027t strictly need CSD_FLAG_WAIT, rework\nthe code so that we can use CSD_FLAG_LOCK for both purposes.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "7e49fcce1bdadd723ae6a0b3b324c4daced61563", "tree": "a2bf1a143ed33ca01612dfab1fb7c993c467cdb0", "parents": [ "b06a830183b610c0a88c29a92feb7991a867ab46" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Jan 22 19:01:40 2009 -0500" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jan 23 11:10:57 2009 +0100" }, "message": "trace, lockdep: manual preempt count adding for local_bh_disable\n\nImpact: fix to preempt trace triggering lockdep check_flag failure\n\nIn local_bh_disable, the use of add_preempt_count causes the\npreempt tracer to start recording the time preemption is off.\nBut because it already modified the preempt_count to show\nsoftirqs disabled, and before it called the lockdep code to\nhandle this, it causes a state that lockdep can not handle.\n\nThe preempt tracer will reset the ring buffer on start of a trace,\nand the ring buffer reset code does a spin_lock_irqsave. This\ncalls into lockdep and lockdep will fail when it detects the\ninvalid state of having softirqs disabled but the internal\ncurrent-\u003esoftirqs_enabled is still set.\n\nThe fix is to manually add the SOFTIRQ_OFFSET to preempt count\nand call the preempt tracer code outside the lockdep critical\narea.\n\nThanks to Peter Zijlstra for suggesting this solution.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "4a046d1754ee6ebb6f399696805ed61ea0444d4c", "tree": "9b9e8e63d9490aea4c2f06263ad541cb8115eb63", "parents": [ "e65e49d0f3714f4a6a42f6f6a19926ba33fcda75" ], "author": { "name": "Yinghai Lu", "email": "yinghai@kernel.org", "time": "Mon Jan 12 17:39:24 2009 -0800" }, "committer": { "name": "Mike Travis", "email": "travis@sgi.com", "time": "Mon Jan 12 17:39:24 2009 -0800" }, "message": "x86: arch_probe_nr_irqs\n\nImpact: save RAM with large NR_CPUS, get smaller nr_irqs\n\nSigned-off-by: Yinghai Lu \u003cyinghai@kernel.org\u003e\nSigned-off-by: Mike Travis \u003ctravis@sgi.com\u003e\n" }, { "commit": "7d3b56ba37a95f1f370f50258ed3954c304c524b", "tree": "86102527b92f02450aa245f084ffb491c18d2e0a", "parents": [ "269b012321f2f1f8e4648c43a93bf432b42c6668", "ab14398abd195af91a744c320a52a1bce814dd1e" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jan 03 12:04:39 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jan 03 12:04:39 2009 -0800" }, "message": "Merge branch \u0027cpus4096-for-linus-3\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027cpus4096-for-linus-3\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (77 commits)\n x86: setup_per_cpu_areas() cleanup\n cpumask: fix compile error when CONFIG_NR_CPUS is not defined\n cpumask: use alloc_cpumask_var_node where appropriate\n cpumask: convert shared_cpu_map in acpi_processor* structs to cpumask_var_t\n x86: use cpumask_var_t in acpi/boot.c\n x86: cleanup some remaining usages of NR_CPUS where s/b nr_cpu_ids\n sched: put back some stack hog changes that were undone in kernel/sched.c\n x86: enable cpus display of kernel_max and offlined cpus\n ia64: cpumask fix for is_affinity_mask_valid()\n cpumask: convert RCU implementations, fix\n xtensa: define __fls\n mn10300: define __fls\n m32r: define __fls\n h8300: define __fls\n frv: define __fls\n cris: define __fls\n cpumask: CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS\n cpumask: zero extra bits in alloc_cpumask_var_node\n cpumask: replace for_each_cpu_mask_nr with for_each_cpu in kernel/time/\n cpumask: convert mm/\n ...\n" }, { "commit": "f1fc057c79cb2d27602fb3ad08a031f13459ef27", "tree": "1bfa272b43e76b1abc0bf27361ad088fc5a17ba1", "parents": [ "4462344ee9ea9224d026801b877887f2f39774a3" ], "author": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Thu Jan 01 10:12:23 2009 +1030" }, "committer": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Thu Jan 01 10:12:23 2009 +1030" }, "message": "cpumask: remove any_online_cpu() users: kernel/\n\nImpact: Remove obsolete API usage\n\nany_online_cpu() is a good name, but it takes a cpumask_t, not a\npointer.\n\nThere are several places where any_online_cpu() doesn\u0027t really want a\nmask arg at all. Replace all callers with cpumask_any() and\ncpumask_any_and().\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Mike Travis \u003ctravis@sgi.com\u003e\n" }, { "commit": "db200df0b3530f673d8e9f5bd535e9e10305842a", "tree": "9a94039b8813452c51a50fcb45e95c32a9f0e537", "parents": [ "ec270e59a74eee972006a87c8e12514a20588369", "43a256322ac1fc105c181b3cade3b9bfc0b63ca1" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Dec 31 09:00:59 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Dec 31 09:00:59 2008 -0800" }, "message": "Merge branch \u0027irq-fixes-for-linus-4\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027irq-fixes-for-linus-4\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n sparseirq: move __weak symbols into separate compilation unit\n sparseirq: work around __weak alias bug\n sparseirq: fix hang with !SPARSE_IRQ\n sparseirq: set lock_class for legacy irq when sparse_irq is selected\n sparseirq: work around compiler optimizing away __weak functions\n sparseirq: fix desc-\u003elock init\n sparseirq: do not printk when migrating IRQ descriptors\n sparseirq: remove duplicated arch_early_irq_init()\n irq: simplify for_each_irq_desc() usage\n proc: remove ifdef CONFIG_SPARSE_IRQ from stat.c\n irq: for_each_irq_desc() move to irqnr.h\n hrtimer: remove #include \u003clinux/irq.h\u003e\n" }, { "commit": "43a256322ac1fc105c181b3cade3b9bfc0b63ca1", "tree": "6f4b6fc286451598d20222af8b511fe0a3fcdcfc", "parents": [ "b2e2fe99628c4f944c3075258e536197b5a4f3f8" ], "author": { "name": "Yinghai Lu", "email": "yhlu.kernel@gmail.com", "time": "Sun Dec 28 16:01:13 2008 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Dec 29 12:15:49 2008 +0100" }, "message": "sparseirq: move __weak symbols into separate compilation unit\n\nGCC has a bug with __weak alias functions: if the functions are in\nthe same compilation unit as their call site, GCC can decide to\ninline them - and thus rob the linker of the opportunity to override\nthe weak alias with the real thing.\n\nSo move all the IRQ handling related __weak symbols to kernel/irq/chip.c.\n\nSigned-off-by: Yinghai Lu \u003cyinghai@kernel.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "6638101c1124c19c8a65b1645e4ecd09e0572f3e", "tree": "a1e47e8da2e5478846afdd91e8ebcf0914ed7373", "parents": [ "cc37d3d20604f3759d269247b022616f710aa52d", "3ae7020543db0b769538e64d1ce8d51fceff60ca", "a08636690d06b2e36cfb4c2b3ee133a81c47e1e0", "00ef9f7348dfd2fc223ec42aceb30836e86b367f", "26cc271db798cf211d35967cbfbb53e997126b84", "12d79bafb75639f406a9f71aab94808c414c836e", "3ac52669c7a24b93663acfcab606d1065ed1accd", "8b752e3ef6e3f5cde87afc649dd51d92b1e549c1", "9212ddb5eada64fec5a08b28207401f3cc3d0876" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Dec 25 14:06:29 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Dec 25 14:06:29 2008 +0100" }, "message": "Merge branches \u0027core/debugobjects\u0027, \u0027core/iommu\u0027, \u0027core/locking\u0027, \u0027core/printk\u0027, \u0027core/rcu\u0027, \u0027core/resources\u0027, \u0027core/softirq\u0027 and \u0027core/stacktrace\u0027 into core/core\n" }, { "commit": "64db4cfff99c04cd5f550357edcc8780f96b54a2", "tree": "4856e788d21f0e31ed78a22b70b4521f7237705e", "parents": [ "d110ec3a1e1f522e2e9dfceb9c36d6590c26d2d4" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Dec 18 21:55:32 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Dec 18 21:56:04 2008 +0100" }, "message": "\"Tree RCU\": scalable classic RCU implementation\n\nThis patch fixes a long-standing performance bug in classic RCU that\nresults in massive internal-to-RCU lock contention on systems with\nmore than a few hundred CPUs. Although this patch creates a separate\nflavor of RCU for ease of review and patch maintenance, it is intended\nto replace classic RCU.\n\nThis patch still handles stress better than does mainline, so I am still\ncalling it ready for inclusion. This patch is against the -tip tree.\nNevertheless, experience on an actual 1000+ CPU machine would still be\nmost welcome.\n\nMost of the changes noted below were found while creating an rcutiny\n(which should permit ejecting the current rcuclassic) and while doing\ndetailed line-by-line documentation.\n\nUpdates from v9 (http://lkml.org/lkml/2008/12/2/334):\n\no\tFixes from remainder of line-by-line code walkthrough,\n\tincluding comment spelling, initialization, undesirable\n\tnarrowing due to type conversion, removing redundant memory\n\tbarriers, removing redundant local-variable initialization,\n\tand removing redundant local variables.\n\n\tI do not believe that any of these fixes address the CPU-hotplug\n\tissues that Andi Kleen was seeing, but please do give it a whirl\n\tin case the machine is smarter than I am.\n\n\tA writeup from the walkthrough may be found at the following\n\tURL, in case you are suffering from terminal insomnia or\n\tmasochism:\n\n\thttp://www.kernel.org/pub/linux/kernel/people/paulmck/tmp/rcutree-walkthrough.2008.12.16a.pdf\n\no\tMade rcutree tracing use seq_file, as suggested some time\n\tago by Lai Jiangshan.\n\no\tAdded a .csv variant of the rcudata debugfs trace file, to allow\n\tpeople having thousands of CPUs to drop the data into\n\ta spreadsheet.\tTested with oocalc and gnumeric. Updated\n\tdocumentation to suit.\n\nUpdates from v8 (http://lkml.org/lkml/2008/11/15/139):\n\no\tFix a theoretical race between grace-period initialization and\n\tforce_quiescent_state() that could occur if more than three\n\tjiffies were required to carry out the grace-period\n\tinitialization. Which it might, if you had enough CPUs.\n\no\tApply Ingo\u0027s printk-standardization patch.\n\no\tSubstitute local variables for repeated accesses to global\n\tvariables.\n\no\tFix comment misspellings and redundant (but harmless) increments\n\tof -\u003en_rcu_pending (this latter after having explicitly added it).\n\no\tApply checkpatch fixes.\n\nUpdates from v7 (http://lkml.org/lkml/2008/10/10/291):\n\no\tFixed a number of problems noted by Gautham Shenoy, including\n\tthe cpu-stall-detection bug that he was having difficulty\n\tconvincing me was real. ;-)\n\no\tChanged cpu-stall detection to wait for ten seconds rather than\n\tthree in order to reduce false positive, as suggested by Ingo\n\tMolnar.\n\no\tProduced a design document (http://lwn.net/Articles/305782/).\n\tThe act of writing this document uncovered a number of both\n\ttheoretical and \"here and now\" bugs as noted below.\n\no\tFix dynticks_nesting accounting confusion, simplify WARN_ON()\n\tcondition, fix kerneldoc comments, and add memory barriers\n\tin dynticks interface functions.\n\no\tAdd more data to tracing.\n\no\tRemove unused \"rcu_barrier\" field from rcu_data structure.\n\no\tCount calls to rcu_pending() from scheduling-clock interrupt\n\tto use as a surrogate timebase should jiffies stop counting.\n\no\tFix a theoretical race between force_quiescent_state() and\n\tgrace-period initialization. Yes, initialization does have to\n\tgo on for some jiffies for this race to occur, but given enough\n\tCPUs...\n\nUpdates from v6 (http://lkml.org/lkml/2008/9/23/448):\n\no\tFix a number of checkpatch.pl complaints.\n\no\tApply review comments from Ingo Molnar and Lai Jiangshan\n\ton the stall-detection code.\n\no\tFix several bugs in !CONFIG_SMP builds.\n\no\tFix a misspelled config-parameter name so that RCU now announces\n\tat boot time if stall detection is configured.\n\no\tRun tests on numerous combinations of configurations parameters,\n\twhich after the fixes above, now build and run correctly.\n\nUpdates from v5 (http://lkml.org/lkml/2008/9/15/92, bad subject line):\n\no\tFix a compiler error in the !CONFIG_FANOUT_EXACT case (blew a\n\tchangeset some time ago, and finally got around to retesting\n\tthis option).\n\no\tFix some tracing bugs in rcupreempt that caused incorrect\n\ttotals to be printed.\n\no\tI now test with a more brutal random-selection online/offline\n\tscript (attached). Probably more brutal than it needs to be\n\ton the people reading it as well, but so it goes.\n\no\tA number of optimizations and usability improvements:\n\n\to\tMake rcu_pending() ignore the grace-period timeout when\n\t\tthere is no grace period in progress.\n\n\to\tMake force_quiescent_state() avoid going for a global\n\t\tlock in the case where there is no grace period in\n\t\tprogress.\n\n\to\tRearrange struct fields to improve struct layout.\n\n\to\tMake call_rcu() initiate a grace period if RCU was\n\t\tidle, rather than waiting for the next scheduling\n\t\tclock interrupt.\n\n\to\tInvoke rcu_irq_enter() and rcu_irq_exit() only when\n\t\tidle, as suggested by Andi Kleen. I still don\u0027t\n\t\tcompletely trust this change, and might back it out.\n\n\to\tMake CONFIG_RCU_TRACE be the single config variable\n\t\tmanipulated for all forms of RCU, instead of the prior\n\t\tconfusion.\n\n\to\tDocument tracing files and formats for both rcupreempt\n\t\tand rcutree.\n\nUpdates from v4 for those missing v5 given its bad subject line:\n\no\tSeparated dynticks interface so that NMIs and irqs call separate\n\tfunctions, greatly simplifying it. In particular, this code\n\tno longer requires a proof of correctness. ;-)\n\no\tSeparated dynticks state out into its own per-CPU structure,\n\tavoiding the duplicated accounting.\n\no\tThe case where a dynticks-idle CPU runs an irq handler that\n\tinvokes call_rcu() is now correctly handled, forcing that CPU\n\tout of dynticks-idle mode.\n\no\tReview comments have been applied (thank you all!!!).\n\tFor but one example, fixed the dynticks-ordering issue that\n\tManfred pointed out, saving me much debugging. ;-)\n\no\tAdjusted rcuclassic and rcupreempt to handle dynticks changes.\n\nAttached is an updated patch to Classic RCU that applies a hierarchy,\ngreatly reducing the contention on the top-level lock for large machines.\nThis passes 10-hour concurrent rcutorture and online-offline testing on\n128-CPU ppc64 without dynticks enabled, and exposes some timekeeping\nbugs in presence of dynticks (exciting working on a system where\n\"sleep 1\" hangs until interrupted...), which were fixed in the\n2.6.27 kernel. It is getting more reliable than mainline by some\nmeasures, so the next version will be against -tip for inclusion.\nSee also Manfred Spraul\u0027s recent patches (or his earlier work from\n2004 at http://marc.info/?l\u003dlinux-kernel\u0026m\u003d108546384711797\u0026w\u003d2).\nWe will converge onto a common patch in the fullness of time, but are\ncurrently exploring different regions of the design space. That said,\nI have already gratefully stolen quite a few of Manfred\u0027s ideas.\n\nThis patch provides CONFIG_RCU_FANOUT, which controls the bushiness\nof the RCU hierarchy. Defaults to 32 on 32-bit machines and 64 on\n64-bit machines. If CONFIG_NR_CPUS is less than CONFIG_RCU_FANOUT,\nthere is no hierarchy. By default, the RCU initialization code will\nadjust CONFIG_RCU_FANOUT to balance the hierarchy, so strongly NUMA\narchitectures may choose to set CONFIG_RCU_FANOUT_EXACT to disable\nthis balancing, allowing the hierarchy to be exactly aligned to the\nunderlying hardware. Up to two levels of hierarchy are permitted\n(in addition to the root node), allowing up to 16,384 CPUs on 32-bit\nsystems and up to 262,144 CPUs on 64-bit systems. I just know that I\nam going to regret saying this, but this seems more than sufficient\nfor the foreseeable future. (Some architectures might wish to set\nCONFIG_RCU_FANOUT\u003d4, which would limit such architectures to 64 CPUs.\nIf this becomes a real problem, additional levels can be added, but I\ndoubt that it will make a significant difference on real hardware.)\n\nIn the common case, a given CPU will manipulate its private rcu_data\nstructure and the rcu_node structure that it shares with its immediate\nneighbors. This can reduce both lock and memory contention by multiple\norders of magnitude, which should eliminate the need for the strange\nmanipulations that are reported to be required when running Linux on\nvery large systems.\n\nSome shortcomings:\n\no\tMore bugs will probably surface as a result of an ongoing\n\tline-by-line code inspection.\n\n\tPatches will be provided as required.\n\no\tThere are probably hangs, rcutorture failures, \u0026c. Seems\n\tquite stable on a 128-CPU machine, but that is kind of small\n\tcompared to 4096 CPUs. However, seems to do better than\n\tmainline.\n\n\tPatches will be provided as required.\n\no\tThe memory footprint of this version is several KB larger\n\tthan rcuclassic.\n\n\tA separate UP-only rcutiny patch will be provided, which will\n\treduce the memory footprint significantly, even compared\n\tto the old rcuclassic. One such patch passes light testing,\n\tand has a memory footprint smaller even than rcuclassic.\n\tInitial reaction from various embedded guys was \"it is not\n\tworth it\", so am putting it aside.\n\nCredits:\n\no\tManfred Spraul for ideas, review comments, and bugs spotted,\n\tas well as some good friendly competition. ;-)\n\no\tJosh Triplett, Ingo Molnar, Peter Zijlstra, Mathieu Desnoyers,\n\tLai Jiangshan, Andi Kleen, Andy Whitcroft, and Andrew Morton\n\tfor reviews and comments.\n\no\tThomas Gleixner for much-needed help with some timer issues\n\t(see patches below).\n\no\tJon M. Tollefson, Tim Pepper, Andrew Theurer, Jose R. Santos,\n\tAndy Whitcroft, Darrick Wong, Nishanth Aravamudan, Anton\n\tBlanchard, Dave Kleikamp, and Nathan Lynch for keeping machines\n\talive despite my heavy abuse^Wtesting.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8b752e3ef6e3f5cde87afc649dd51d92b1e549c1", "tree": "352c2790e31c595cb4c15e4fe751251c4596299f", "parents": [ "ed313489badef16d700f5a3be50e8fd8f8294bc8" ], "author": { "name": "Liming Wang", "email": "liming.wang@windriver.com", "time": "Fri Nov 28 09:52:40 2008 +0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Nov 28 12:38:38 2008 +0100" }, "message": "softirq: remove useless function __local_bh_enable\n\nImpact: remove unused code\n\n__local_bh_enable has been replaced with _local_bh_enable.\nAs comments says \"it always nests inside local_bh_enable() sections\"\nhas not been valid now. Also there is no reason to use __local_bh_enable\nanywhere, so we can remove this useless function.\n\nSigned-off-by: Liming Wang \u003climing.wang@windriver.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "ee5f80a993539490a07477ff2526bf62c503fbb4", "tree": "4c23450fb35f9dfdb491506a3864647aae7e8e78", "parents": [ "5ceb1a04187553e08c6ab60d30cee7c454ee139a" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Fri Nov 07 11:06:00 2008 +0100" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@apollo.(none)", "time": "Mon Nov 10 22:36:39 2008 +0100" }, "message": "irq: call __irq_enter() before calling the tick_idle_check\n\nImpact: avoid spurious ksoftirqd wakeups\n\nThe tick idle check which is called from irq_enter() was run before\nthe call to __irq_enter() which did not set the in_interrupt() bits in\npreempt_count. That way the raise of a softirq woke up softirqd for\nnothing as the softirq was handled on return from interrupt.\n\nCall __irq_enter() before calling into the tick idle check code.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "c465a76af658b443075d6efee1c3131257643020", "tree": "63c28c9fab02dedec7f03cee4a3ef7fe4dc1c072", "parents": [ "2d42244ae71d6c7b0884b5664cf2eda30fb2ae68", "1b02469088ac7a13d7e622b618b7410d0f1ce5ec", "fb02fbc14d17837b4b7b02dbb36142c16a7bf208", "d40e944c25fb4642adb2a4c580a48218a9f3f824", "1508487e7f16d992ad23cabd3712563ff912f413", "322acf6585f3c4e82ee32a246b0483ca0f6ad3f4" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Mon Oct 20 13:14:06 2008 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Mon Oct 20 13:14:06 2008 +0200" }, "message": "Merge branches \u0027timers/clocksource\u0027, \u0027timers/hrtimers\u0027, \u0027timers/nohz\u0027, \u0027timers/ntp\u0027, \u0027timers/posixtimers\u0027 and \u0027timers/debug\u0027 into v28-timers-for-linus\n" }, { "commit": "719254faa17ffedc87ba0fadb9b34e535c9758d5", "tree": "6afe1e9f2175aa5394cf6e0fc7c84afef0be3e9b", "parents": [ "2e532d68a2b3e2aa6b19731501222069735c741c" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Fri Oct 17 09:59:47 2008 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@apollo.(none)", "time": "Fri Oct 17 18:13:38 2008 +0200" }, "message": "NOHZ: unify the nohz function calls in irq_enter()\n\nWe have two separate nohz function calls in irq_enter() for no good\nreason. Just call a single NOHZ function from irq_enter() and call\nthe bits in the tick code.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "54514a70adefe356afe854e2d3912d46668068e6", "tree": "e2b08f2c10ff427447fdc40e96555fc2f22549e1", "parents": [ "2e532d68a2b3e2aa6b19731501222069735c741c" ], "author": { "name": "David S. Miller", "email": "davem@davemloft.net", "time": "Tue Sep 23 22:15:57 2008 -0700" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Oct 17 08:46:56 2008 +0200" }, "message": "softirq: Add support for triggering softirq work on softirqs.\n\nThis is basically a genericization of Jens Axboe\u0027s block layer\nremote softirq changes.\n\nSigned-off-by: David S. Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "1c95e1b69073cff5ff179e592fa1a1e182c78a17", "tree": "3fc9d1f665f66beb24d66b3ea65d2b5fdd7a1878", "parents": [ "e533b227055598b1f7dc8503a3b4f36b14b9da8a" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 16 15:32:46 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 16 15:32:46 2008 -0700" }, "message": "Fix kernel/softirq.c printk format warning properly\n\nThis fixes the broken 77af7e3403e7314c47b0c07fbc5e4ef21d939532\n(\"softirq, warning fix: correct a format to avoid a warning\") fix\ncorrectly.\n\nThe type of a pointer subtraction is not \"int\", nor is it \"long\". It\ncan be either (or something else). It\u0027s \"ptrdiff_t\", and the printk\nformat for it is \"%td\".\n\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "77af7e3403e7314c47b0c07fbc5e4ef21d939532", "tree": "76bc65173d4880fd2dfc5f31a520d1e9345fffcf", "parents": [ "8e85b4b553fc932e1c5141feb5fda389b7f5db01" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Oct 03 11:39:46 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Oct 03 11:41:41 2008 +0200" }, "message": "softirq, warning fix: correct a format to avoid a warning\n\nLast -tip gives this warning:\n\nkernel/softirq.c: Dans la fonction «__do_softirq» :\nkernel/softirq.c:216: attention : format «%ld» expects type «long int», but argument 2 has type «int»\n\nThis patch corrects the format type, and a small mistake in the \"softirq\" word.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8e85b4b553fc932e1c5141feb5fda389b7f5db01", "tree": "2e3f1894e36be800aadeac7ed86ebb4f9fb992a3", "parents": [ "978b0116cd225682a29e3d1d5010319bf2de32c2" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Thu Oct 02 10:50:53 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Oct 02 10:58:04 2008 +0200" }, "message": "softirqs, debug: preemption check\n\nif a preempt count leaks out of a softirq handler it can be very hard\nto figure it out. Add a debug check for this.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "978b0116cd225682a29e3d1d5010319bf2de32c2", "tree": "250cc9c7740e72407993f22358449b87d322cb32", "parents": [ "70bb08962ea9bd50797ae9f16b2493f5f7c65053" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Sat Sep 06 20:04:36 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Sep 06 20:04:36 2008 +0200" }, "message": "softirq: allocate less vectors\n\nWe don\u0027t need whole 32 of them, only NR_SOFTIRQS.\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "7babe8db99d305340cf4828ce1f5a1481d5622ef", "tree": "fdac7a084646bb6d125ebc62b0b75806e45d1025", "parents": [ "c2147a5092cfe13dbf3210e54e8a622015edeecc" ], "author": { "name": "Eduard - Gabriel Munteanu", "email": "eduard.munteanu@linux360.ro", "time": "Fri Jul 25 19:45:11 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jul 26 12:00:04 2008 -0700" }, "message": "Full conversion to early_initcall() interface, remove old interface\n\nA previous patch added the early_initcall(), to allow a cleaner hooking of\npre-SMP initcalls. Now we remove the older interface, converting all\nexisting users to the new one.\n\n[akpm@linux-foundation.org: cleanups]\n[akpm@linux-foundation.org: build fix]\n[kosaki.motohiro@jp.fujitsu.com: warning fix]\n[kosaki.motohiro@jp.fujitsu.com: warning fix]\nSigned-off-by: Eduard - Gabriel Munteanu \u003ceduard.munteanu@linux360.ro\u003e\nCc: Tom Zanussi \u003ctzanussi@gmail.com\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9b610fda0df5d0f0b0c64242e37441ad1b384aac", "tree": "0ea14b15f2e6546f37fe18d8ac3dc83077ec0e55", "parents": [ "b8f8c3cf0a4ac0632ec3f0e15e9dc0c29de917af", "5b664cb235e97afbf34db9c4d77f08ebd725335e" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jul 18 19:53:16 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jul 18 19:53:16 2008 +0200" }, "message": "Merge branch \u0027linus\u0027 into timers/nohz\n" }, { "commit": "b8f8c3cf0a4ac0632ec3f0e15e9dc0c29de917af", "tree": "183825db00f4e9252603a51a1be6f8874a963dbc", "parents": [ "857f3fd7a496ddf4329345af65a4a2b16dd25fe8" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Fri Jul 18 17:27:28 2008 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Fri Jul 18 18:10:28 2008 +0200" }, "message": "nohz: prevent tick stop outside of the idle loop\n\nJack Ren and Eric Miao tracked down the following long standing\nproblem in the NOHZ code:\n\n\tscheduler switch to idle task\n\tenable interrupts\n\nWindow starts here\n\n\t----\u003e interrupt happens (does not set NEED_RESCHED)\n\t \tirq_exit() stops the tick\n\n\t----\u003e interrupt happens (does set NEED_RESCHED)\n\n\treturn from schedule()\n\t\n\tcpu_idle(): preempt_disable();\n\nWindow ends here\n\nThe interrupts can happen at any point inside the race window. The\nfirst interrupt stops the tick, the second one causes the scheduler to\nrerun and switch away from idle again and we end up with the tick\ndisabled.\n\nThe fact that it needs two interrupts where the first one does not set\nNEED_RESCHED and the second one does made the bug obscure and extremly\nhard to reproduce and analyse. Kudos to Jack and Eric.\n\nSolution: Limit the NOHZ functionality to the idle loop to make sure\nthat we can not run into such a situation ever again.\n\ncpu_idle()\n{\n\tpreempt_disable();\n\n\twhile(1) {\n\t\t tick_nohz_stop_sched_tick(1); \u003c- tell NOHZ code that we\n\t\t \t\t\t are in the idle loop\n\n\t\t while (!need_resched())\n\t\t halt();\n\n\t\t tick_nohz_restart_sched_tick(); \u003c- disables NOHZ mode\n\t\t preempt_enable_no_resched();\n\t\t schedule();\n\t\t preempt_disable();\n\t}\n}\n\nIn hindsight we should have done this forever, but ... \n\n/me grabs a large brown paperbag.\n\nDebugged-by: Jack Ren \u003cjack.ren@marvell.com\u003e, \nDebugged-by: eric miao \u003ceric.y.miao@gmail.com\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n\n" }, { "commit": "1a781a777b2f6ac46523fe92396215762ced624d", "tree": "4f34bb4aade85c0eb364b53d664ec7f6ab959006", "parents": [ "b9d2252c1e44fa83a4e65fdc9eb93db6297c55af", "42a2f217a5e324ed5f2373ab1b7a0a15187c4d6c" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jul 15 21:55:59 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jul 15 21:55:59 2008 +0200" }, "message": "Merge branch \u0027generic-ipi\u0027 into generic-ipi-for-linus\n\nConflicts:\n\n\tarch/powerpc/Kconfig\n\tarch/s390/kernel/time.c\n\tarch/x86/kernel/apic_32.c\n\tarch/x86/kernel/cpu/perfctr-watchdog.c\n\tarch/x86/kernel/i8259_64.c\n\tarch/x86/kernel/ldt.c\n\tarch/x86/kernel/nmi_64.c\n\tarch/x86/kernel/smpboot.c\n\tarch/x86/xen/smp.c\n\tinclude/asm-x86/hw_irq_32.h\n\tinclude/asm-x86/hw_irq_64.h\n\tinclude/asm-x86/mach-default/irq_vectors.h\n\tinclude/asm-x86/mach-voyager/irq_vectors.h\n\tinclude/asm-x86/smp.h\n\tkernel/Makefile\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "666484f0250db2e016948d63b3ef33e202e3b8d0", "tree": "734f48c10aa364965e4f4642ee3de51669e62be2", "parents": [ "d18bb9a548e550f3ced57618e75085fb3f173133", "ace7f1b79670aa0c1d9f4b0442be82e565827333" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jul 14 15:28:42 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jul 14 15:28:42 2008 -0700" }, "message": "Merge branch \u0027core/softirq\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core/softirq\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n softirq: remove irqs_disabled warning from local_bh_enable\n softirq: remove initialization of static per-cpu variable\n Remove argument from open_softirq which is always NULL\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": "8691e5a8f691cc2a4fda0651e8d307aaba0e7d68", "tree": "6cb6767064d2d43441212566da2d83dcc9a0cd8e", "parents": [ "490f5de52a87063fcb40e3b22f61b0779603ff6d" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Jun 06 11:18:06 2008 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Thu Jun 26 11:24:35 2008 +0200" }, "message": "smp_call_function: get rid of the unused nonatomic/retry argument\n\nIt\u0027s never used and the comments refer to nonatomic and retry\ninterchangably. So get rid of it.\n\nAcked-by: Jeremy Fitzhardinge \u003cjeremy.fitzhardinge@citrix.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "961ccddd59d627b89bd3dc284b6517833bbdf25d", "tree": "4d755085845b8beeaa0bbc3d3ee66e1ccc4156a8", "parents": [ "481c5346d0981940ee63037eb53e4e37b0735c10" ], "author": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Mon Jun 23 13:55:38 2008 +1000" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jun 23 22:57:56 2008 +0200" }, "message": "sched: add new API sched_setscheduler_nocheck: add a flag to control access checks\n\nHidehiro Kawai noticed that sched_setscheduler() can fail in\nstop_machine: it calls sched_setscheduler() from insmod, which can\nhave CAP_SYS_MODULE without CAP_SYS_NICE.\n\nTwo cases could have failed, so are changed to sched_setscheduler_nocheck:\n kernel/softirq.c:cpu_callback()\n\t- CPU hotplug callback\n kernel/stop_machine.c:__stop_machine_run()\n\t- Called from various places, including modprobe()\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Jeremy Fitzhardinge \u003cjeremy@goop.org\u003e\nCc: Hidehiro Kawai \u003chidehiro.kawai.ez@hitachi.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: linux-mm@kvack.org\nCc: sugita \u003cyumiko.sugita.yf@hitachi.com\u003e\nCc: Satoshi OSHIMA \u003csatoshi.oshima.fk@hitachi.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "0f476b6d91a1395bda6464e653ce66ea9bea7167", "tree": "28a7f73ebc553dec0ee136395c99f641b0cbf6cc", "parents": [ "4620b49f76096fa5183eecad7d689faa898a4c82" ], "author": { "name": "Johannes Berg", "email": "johannes@sipsolutions.net", "time": "Wed Jun 18 09:29:37 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jun 20 15:45:29 2008 +0200" }, "message": "softirq: remove irqs_disabled warning from local_bh_enable\n\nThere\u0027s no need to use local_irq_save() over local_irq_disable() in the\nlocal_bh_enable code since it is a bug to call it with irqs disabled and\ndo_softirq will enable irqs if there is any pending work.\n\nConsolidate the code from local_bh_enable and ..._ip to avoid having a\ndisconnect between them in the warnings they trigger that is currently\nthere.\n\nAlso always trigger the warning on in_irq(), not just in the\ntrace-irqflags case.\n\nSigned-off-by: Johannes Berg \u003cjohannes@sipsolutions.net\u003e\nCc: Michael Buesch \u003cmb@bu3sch.de\u003e\nCc: David Ellingsworth \u003cdavid@identd.dyndns.org\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "4620b49f76096fa5183eecad7d689faa898a4c82", "tree": "872e0744a24a2c1c85920a425894bbb2dc1620a6", "parents": [ "9583f3d9c00974911daf227cbaa12d6c1caaabad" ], "author": { "name": "Vegard Nossum", "email": "vegard.nossum@gmail.com", "time": "Thu Jun 12 23:21:53 2008 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jun 18 14:30:43 2008 +0200" }, "message": "softirq: remove initialization of static per-cpu variable\n\nSigned-off-by: Vegard Nossum \u003cvegard.nossum@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "962cf36c5bf6d2840b8d66ee9a606fae2f540bbd", "tree": "263ead6b5224453e8c2a92f1ad9cd2091e003b68", "parents": [ "75d3bce2fc0a80f435fe12f2c9ed2632c8ac29e4" ], "author": { "name": "Carlos R. Mafra", "email": "crmafra2@gmail.com", "time": "Thu May 15 11:15:37 2008 -0300" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Sun May 25 07:43:15 2008 +0200" }, "message": "Remove argument from open_softirq which is always NULL\n\nAs git-grep shows, open_softirq() is always called with the last argument\nbeing NULL\n\nblock/blk-core.c: open_softirq(BLOCK_SOFTIRQ, blk_done_softirq, NULL);\nkernel/hrtimer.c: open_softirq(HRTIMER_SOFTIRQ, run_hrtimer_softirq, NULL);\nkernel/rcuclassic.c: open_softirq(RCU_SOFTIRQ, rcu_process_callbacks, NULL);\nkernel/rcupreempt.c: open_softirq(RCU_SOFTIRQ, rcu_process_callbacks, NULL);\nkernel/sched.c: open_softirq(SCHED_SOFTIRQ, run_rebalance_domains, NULL);\nkernel/softirq.c: open_softirq(TASKLET_SOFTIRQ, tasklet_action, NULL);\nkernel/softirq.c: open_softirq(HI_SOFTIRQ, tasklet_hi_action, NULL);\nkernel/timer.c: open_softirq(TIMER_SOFTIRQ, run_timer_softirq, NULL);\nnet/core/dev.c: open_softirq(NET_TX_SOFTIRQ, net_tx_action, NULL);\nnet/core/dev.c: open_softirq(NET_RX_SOFTIRQ, net_rx_action, NULL);\n\nThis observation has already been made by Matthew Wilcox in June 2002\n(http://www.cs.helsinki.fi/linux/linux-kernel/2002-25/0687.html)\n\n\"I notice that none of the current softirq routines use the data element\npassed to them.\"\n\nand the situation hasn\u0027t changed since them. So it appears we can safely\nremove that extra argument to save 128 (54) bytes of kernel data (text).\n\nSigned-off-by: Carlos R. Mafra \u003ccrmafra@ift.unesp.br\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "e5e417232e7c9ecc58a77902d2e8dd46792cd092", "tree": "d42798a6dafa81ff63784b2017ce647bd41a4f57", "parents": [ "6bffd7b57d747d74ec2962d7c822f4b86e9f64d4" ], "author": { "name": "Christian Borntraeger", "email": "borntraeger@de.ibm.com", "time": "Thu May 01 04:34:23 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 01 08:03:58 2008 -0700" }, "message": "Fix cpu hotplug problem in softirq code\n\ncurrently cpu hotplug (unplug) seems broken on s390 and likely others. On cpu\nunplug the system starts to behave very strange and hangs.\n\nI bisected the problem to the following commit:\n\ncommit 48f20a9a9488c432fc86df1ff4b7f4fa895d1183\nAuthor: Olof Johansson \u003colof@lixom.net\u003e\nDate: Tue Mar 4 15:23:25 2008 -0800\n\ttasklets: execute tasklets in the same order they were queued\n\nReverting this patch seems to fix the problem. I looked into takeover_tasklet\nand it seems that there is a way to corrupt the tail pointer of the current\ncpu. If the tasklet list of the frozen cpu is empty, the tail pointer of the\ncurrent cpu points to the address of the head pointer of the stopped cpu and\nnot to the next pointer of a tasklet_struct.\n\nThis patch avoids the list splice of the list is empty and cpu hotplug seems\nto work as the tail pointer is not corrupted. Olof, can you look into that\npatch and ACK/NACK it so Andrew can push this to Linus, if appropriate?\nPlease note that some lines are longer than 80 chars, but line-wrapping looked\nworse that this version.\n\nSigned-off-by: Christian Borntraeger \u003cborntraeger@de.ibm.com\u003e\nAcked-by: Olof Johansson \u003colof@lixom.net\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "48f20a9a9488c432fc86df1ff4b7f4fa895d1183", "tree": "987a41075c8a6640968b6b2054306644e10e4933", "parents": [ "ac086bc22997a2be24fc40fc8d46522fe7e03d11" ], "author": { "name": "Olof Johansson", "email": "olof@lixom.net", "time": "Tue Mar 04 15:23:25 2008 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Apr 19 19:44:58 2008 +0200" }, "message": "tasklets: execute tasklets in the same order they were queued\n\nI noticed this when looking at an openswan issue. Openswan (ab?)uses the\ntasklet API to defer processing of packets in some situations, with one\npacket per tasklet_action(). I started noticing sequences of\nbackwards-ordered sequence numbers coming over the wire, since new tasklets\nare always queued at the head of the list but processed sequentially.\n\nConvert it to instead append new entries to the tail of the list. As an\nextra bonus, the splicing code in takeover_tasklets() no longer has to\niterate over the list.\n\nSigned-off-by: Olof Johansson \u003colof@lixom.net\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "2232c2d8e0a6a31061dec311f3d1cf7624bc14f1", "tree": "1d90ec0b8bd4e3c154e386f005ef596ee25fa53f", "parents": [ "c0f4133b8f70769bc8dda977feb9a29109d6ccca" ], "author": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Feb 29 18:46:50 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Feb 29 18:46:50 2008 +0100" }, "message": "rcu: add support for dynamic ticks and preempt rcu\n\nThe PREEMPT-RCU can get stuck if a CPU goes idle and NO_HZ is set. The\nidle CPU will not progress the RCU through its grace period and a\nsynchronize_rcu my get stuck. Without this patch I have a box that will\nnot boot when PREEMPT_RCU and NO_HZ are set. That same box boots fine\nwith this patch.\n\nThis patch comes from the -rt kernel where it has been tested for\nseveral months.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.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": "7ad5b3a505e68cfdc342933d6e0fc0eaa5e0a4f7", "tree": "6715ffd8df509d3d53dea581bb97418a21bc7cbc", "parents": [ "fc9b52cd8f5f459b88adcf67c47668425ae31a78" ], "author": { "name": "Harvey Harrison", "email": "harvey.harrison@gmail.com", "time": "Fri Feb 08 04:19:53 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Feb 08 09:22:31 2008 -0800" }, "message": "kernel: remove fastcall in kernel/*\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Harvey Harrison \u003charvey.harrison@gmail.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6378ddb592158db4b42197f1bc8666228800e379", "tree": "f9b1e671dfd12fb221f6140dd231ccb14cd9f27e", "parents": [ "bbe4d18ac2e058c56adb0cd71f49d9ed3216a405" ], "author": { "name": "Venki Pallipadi", "email": "venkatesh.pallipadi@intel.com", "time": "Wed Jan 30 13:30:04 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jan 30 13:30:04 2008 +0100" }, "message": "time: track accurate idle time with tick_sched.idle_sleeptime\n\nCurrent idle time in kstat is based on jiffies and is coarse grained.\ntick_sched.idle_sleeptime is making some attempt to keep track of idle time\nin a fine grained manner. But, it is not handling the time spent in\ninterrupts fully.\n\nMake tick_sched.idle_sleeptime accurate with respect to time spent on\nhandling interrupts and also add tick_sched.idle_lastupdate, which keeps\ntrack of last time when idle_sleeptime was updated.\n\nThis statistics will be crucial for cpufreq-ondemand governor, which can\nshed some conservative gaurd band that is uses today while setting the\nfrequency. The ondemand changes that uses the exact idle time is coming\nsoon.\n\nSigned-off-by: Venkatesh Pallipadi \u003cvenkatesh.pallipadi@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "b10db7f0d2b589a7f88dc3026e150756cb437a28", "tree": "92942041770257c78f7271b79d9860eec10bd77c", "parents": [ "4c9dc6412247abf4972080c51cd16a58c4009c19" ], "author": { "name": "Pavel Machek", "email": "pavel@ucw.cz", "time": "Wed Jan 30 13:30:00 2008 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jan 30 13:30:00 2008 +0100" }, "message": "time: more timer related cleanups\n\nI was confused by FSEC \u003d 10^15 NSEC statement, plus small whitespace\nfixes. When there\u0027s copyright, there should be GPL.\n\nSigned-off-by: Pavel Machek \u003cpavel@suse.cz\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "464771fe4743afd00ebff65aee0983fa1aa1da4f", "tree": "abfa2c42df192c55d0aad81bf9140c1009a6a3dc", "parents": [ "a050c33f4a4d5babaf94a8ba6ae7a200135240b3" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Wed Sep 12 15:14:45 2007 +0200" }, "committer": { "name": "David S. Miller", "email": "davem@sunset.davemloft.net", "time": "Wed Oct 10 16:49:18 2007 -0700" }, "message": "[KERNEL]: Unexport raise_softirq_irqoff\n\nraise_softirq_irqoff no longer has any modular user.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: David S. Miller \u003cdavem@davemloft.net\u003e\n" }, { "commit": "c45248c70125cc374fdf264659643276c72801bf", "tree": "fdc05bcf5c5b766a95d531fef0687688d60bfe3c", "parents": [ "b163911f8abf89bafb9cc0ec02a9c43af450ea81" ], "author": { "name": "Robert Olsson", "email": "robert.olsson@its.uu.se", "time": "Mon Sep 17 11:47:12 2007 -0700" }, "committer": { "name": "David S. Miller", "email": "davem@sunset.davemloft.net", "time": "Wed Oct 10 16:48:36 2007 -0700" }, "message": "[SOFTIRQ]: Remove do_softirq() symbol export.\n\nAs noted by Christoph Hellwig, pktgen was the only user so\nit can now be removed.\n\n[ Add missing cases caught by Adrian Bunk. -DaveM ]\n\nSigned-off-by: Robert Olsson \u003crobert.olsson@its.uu.se\u003e\nSigned-off-by: David S. Miller \u003cdavem@davemloft.net\u003e\n" }, { "commit": "831441862956fffa17b9801db37e6ea1650b0f69", "tree": "b0334921341f8f1734bdd3243de76d676329d21c", "parents": [ "787d2214c19bcc9b6ac48af0ce098277a801eded" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Tue Jul 17 04:03:35 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jul 17 10:23:02 2007 -0700" }, "message": "Freezer: make kernel threads nonfreezable by default\n\nCurrently, the freezer treats all tasks as freezable, except for the kernel\nthreads that explicitly set the PF_NOFREEZE flag for themselves. This\napproach is problematic, since it requires every kernel thread to either\nset PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn\u0027t\ncare for the freezing of tasks at all.\n\nIt seems better to only require the kernel threads that want to or need to\nbe frozen to use some freezer-related code and to remove any\nfreezer-related code from the other (nonfreezable) kernel threads, which is\ndone in this patch.\n\nThe patch causes all kernel threads to be nonfreezable by default (ie. to\nhave PF_NOFREEZE set by default) and introduces the set_freezable()\nfunction that should be called by the freezable kernel threads in order to\nunset PF_NOFREEZE. It also makes all of the currently freezable kernel\nthreads call set_freezable(), so it shouldn\u0027t cause any (intentional)\nchange of behaviour to appear. Additionally, it updates documentation to\ndescribe the freezing of tasks more accurately.\n\n[akpm@linux-foundation.org: build fixes]\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Nigel Cunningham \u003cnigel@nigel.suspend2.net\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1c6b4aa94576eee6dec3b8011f60d7f666db90b0", "tree": "68d94f262f47d555e90c764b49bb0925e5e43fca", "parents": [ "85653af7d488702165eba72c6c1dd0250fae4e70" ], "author": { "name": "Satoru Takeuchi", "email": "takeuchi_satoru@jp.fujitsu.com", "time": "Sun Jul 15 23:39:48 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Jul 16 09:05:41 2007 -0700" }, "message": "cpu hotplug: fix ksoftirqd termination on cpu hotplug with naughty realtime process\n\nFix ksoftirqd termination on cpu hotplug with naughty real time process.\n\nAssuming the following case:\n\n - Try to hot remove CPU2 from CPU1.\n - There is a real time process on CPU2, and that process doesn\u0027t sleep at all.\n - That rt process and ksoftirqd/2 is migrated to the CPU0\n\nThen ksoftirqd/2 can\u0027t stop becasue that rt process runs everlastingly on\nCPU0, and CPU1 waiting the ksoftirqd/2\u0027s termination hangs up. To fix this\nproblem, set the priority of ksoftirqd/2 to max one before kthread_stop().\n\n[akpm@linux-foundation.org: fix warning]\nSigned-off-by: Satoru Takeuchi \u003ctakeuchi_satoru@jp.fujitsu.com\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: Ashok Raj \u003cashok.raj@intel.com\u003e\nCc: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "23bdd703a585a869f2eb32fb9f66749d0476d71e", "tree": "fee338306d86c62de986d64647342dc0d1115e87", "parents": [ "ff80a77f20f811c0cc5b251d0f657cbc6f788385" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jul 09 18:52:00 2007 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jul 09 18:52:00 2007 +0200" }, "message": "sched: do not set softirqs to nice +19\n\ndo not set softirqs to nice +19. _If_ for whatever reason\nwe missed to process some high-prio softirq and woke up\nksoftirqd, we should give it a fair chance to actually\nget some work done, even if the system is under load.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\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": "79bf2bb335b85db25d27421c798595a2fa2a0e82", "tree": "550ec2654ae1dd65b871de7fe9c890108c6e86d8", "parents": [ "f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Fri Feb 16 01:28:03 2007 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Feb 16 08:13:59 2007 -0800" }, "message": "[PATCH] tick-management: dyntick / highres functionality\n\nWith Ingo Molnar \u003cmingo@elte.hu\u003e\n\nAdd functions to provide dynamic ticks and high resolution timers. The code\nwhich keeps track of jiffies and handles the long idle periods is shared\nbetween tick based and high resolution timer based dynticks. The dyntick\nfunctionality can be disabled on the kernel commandline. Provide also the\ninfrastructure to support high resolution timers.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: john stultz \u003cjohnstul@us.ibm.com\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "dde4b2b5f4ed275250488dabdaf282d9c6e7e2b8", "tree": "c14b594c39cb5f64216c24440b4a54ef2db3baea", "parents": [ "07190a08eef3666a8687070226c8d403c1d548b7" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Feb 16 01:27:45 2007 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Feb 16 08:13:58 2007 -0800" }, "message": "[PATCH] uninline irq_enter()\n\nUninline irq_enter(). [dynticks adds more stuff to it]\n\nNo functional changes.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: john stultz \u003cjohnstul@us.ibm.com\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3908fd2ed920af818aa596672da68ba26173ff27", "tree": "e16355f141bfdf15f7b1c17d7fd73bfddf9fa1d2", "parents": [ "c949d4eb40ce021b1abc3b63af23aa535662cb17" ], "author": { "name": "Zachary Amsden", "email": "zach@vmware.com", "time": "Wed Dec 06 20:39:39 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:43 2006 -0800" }, "message": "[PATCH] softirq: remove BUG_ONs which can incorrectly trigger\n\nIt is possible to have tasklets get scheduled before softirqd has had a chance\nto spawn on all CPUs. This is totally harmless; after success during action\nCPU_UP_PREPARE, action CPU_ONLINE will be called, which immediately wakes\nsoftirqd on the appropriate CPU to process the already pending tasklets. So\nthere is no danger of having a missed wakeup for any tasklets that were\nalready pending.\n\nIn particular, i386 is affected by this during startup, and is visible when\nusing a very large initrd; during the time it takes for the initrd to be\ndecompressed, a timer IRQ can come in and schedule RCU callbacks. It is also\npossible that resending of a hardware IRQ via a softirq triggers the same bug.\n\nBecause of different timing conditions, this shows up in all emulators and\nvirtual machines tested, including Xen, VMware, Virtual PC, and Qemu. It is\nalso possible to trigger on native hardware with a large enough initrd,\nalthough I don\u0027t have a reliable case demonstrating that.\n\nSigned-off-by: Zachary Amsden \u003czach@vmware.com\u003e\nCc: \u003ccaglar@pardus.org.tr\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "07dccf3344010f9b9df7fe725da7e73bca2992df", "tree": "696730ef4e1bf85a24eac84713921746f74c7c10", "parents": [ "6c2d8b5dcad468cb0bdec3368b53383bde51e487" ], "author": { "name": "Akinobu Mita", "email": "mita@miraclelinux.com", "time": "Fri Sep 29 02:00:22 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Sep 29 09:18:14 2006 -0700" }, "message": "[PATCH] check return value of cpu_callback\n\nSpawing ksoftirqd, migration, or watchdog, and calling init_timers_cpu()\nmay fail with small memory. If it happens in initcalls, kernel NULL\npointer dereference happens later. This patch makes crash happen\nimmediately in such cases. It seems a bit better than getting kernel NULL\npointer dereference later.\n\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Akinobu Mita \u003cmita@miraclelinux.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "3c829c367a1a52550378584a657768217971e587", "tree": "78dfcbe28e6a0db56992ce5ad5891398a9743bf4", "parents": [ "953a7f20667a8b6217ea2ac49c0877e957a0130a" ], "author": { "name": "Tim Chen", "email": "tim.c.chen@linux.intel.com", "time": "Sun Jul 30 03:04:02 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jul 31 13:28:42 2006 -0700" }, "message": "[PATCH] Reducing local_bh_enable/disable overhead in irqtrace\n\nThe recent changes from irqtrace feature has added overheads to\nlocal_bh_disable and local_bh_enable that reduces UDP performance across\nx86_64 and IA64, even though IA64 does not support the irqtrace feature.\nPatch in question is\n\n[PATCH]lockdep: irqtrace subsystem, core\nhttp://www.kernel.org/git/?p\u003dlinux/kernel/git/torvalds/linux-2.6.git;a\u003dc\nommit;h\u003dde30a2b355ea85350ca2f58f3b9bf4e5bc007986\n\nPrior to this patch, local_bh_disable was a short macro. Now it is a\nfunction which calls __local_bh_disable with added irq flags save and\nrestore. The irq flags save and restore were also added to\nlocal_bh_enable, probably for injecting the trace irqs code.\n\nThis overhead is on the generic code path across all architectures. On a\nIA_64 test machine (Itanium-2 1.6 GHz) running a benchmark like netperf\u0027s\nUDP streaming test, the added overhead results in a drop of 3% in\nthroughput, as udp_sendmsg calls the local_bh_enable/disable several times.\n\nOther workloads that have heavy usages of local_bh_enable/disable could\nalso be affected. The patch ideally should not have affected IA-64\nperformance as it does not have IRQ tracing support. A significant portion\nof the overhead is in the added irq flags save and restore, which I think\nis not needed if IRQ tracing is unused. A suggested patch is attached\nbelow that recovers the lost performance. However, the \"ifdef\"s in the\npatch are a bit ugly.\n\nSigned-off-by: Tim Chen \u003ctim.c.chen@intel.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "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": "6bc02d8412b422388f86b09ae40d762c0bc05290", "tree": "7cc50e1c98febff068f31b138b2cae53a9966c9b", "parents": [ "cccedb1a4af9e96781f206acad638c05364e73ca" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Fri Jul 14 00:24:15 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jul 14 21:53:53 2006 -0700" }, "message": "[PATCH] unexport open_softirq\n\nChristoph Hellwig:\nopen_softirq just enables a softirq. The softirq array is statically\nallocated so to add a new one you would have to patch the kernel. So\nthere\u0027s no point to keep this export at all as any user would have to\npatch the enum in include/linux/interrupt.h anyway.\n\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "80d6679a62fe45f440d042099d997a42e4e8c59d", "tree": "64029c46a0607879567bbb2eb38fc22fa500ca2a", "parents": [ "69c3a5b8fd8cfa67be22f6d7ae5c681c6777d817" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Mon Jul 10 04:44:24 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jul 10 13:24:18 2006 -0700" }, "message": "[PATCH] kernel/softirq.c: EXPORT_UNUSED_SYMBOL\n\nThis patch marks an unused export as EXPORT_UNUSED_SYMBOL.\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": "829035fd709119d9def124a6d40b94d317573e6f", "tree": "09dfdf1a8cf02ccd88716b9b4701cb17b03fa06f", "parents": [ "8688cfcebf09b84385b5e2c461ae08fcde8a5d18" ], "author": { "name": "Paul Mackerras", "email": "paulus@samba.org", "time": "Mon Jul 03 00:25:40 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jul 03 15:27:10 2006 -0700" }, "message": "[PATCH] lockdep: irqtrace subsystem, move account_system_vtime() calls into kernel/softirq.c\n\nAt the moment, powerpc and s390 have their own versions of do_softirq which\ninclude local_bh_disable() and __local_bh_enable() calls. They end up\ncalling __do_softirq (in kernel/softirq.c) which also does\nlocal_bh_disable/enable.\n\nApparently the two levels of disable/enable trigger a warning from some\nvalidation code that Ingo is working on, and he would like to see the outer\nlevel removed. But to do that, we have to move the account_system_vtime\ncalls that are currently in the arch do_softirq() implementations for\npowerpc and s390 into the generic __do_softirq() (this is a no-op for other\narchs because account_system_vtime is defined to be an empty inline\nfunction on all other archs). This patch does that.\n\nSigned-off-by: Paul Mackerras \u003cpaulus@samba.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "de30a2b355ea85350ca2f58f3b9bf4e5bc007986", "tree": "0bef670aff65614b3c78ca13b20307355b8221d5", "parents": [ "5bdc9b447c0076f494a56fdcd93ee8c5e78a2afd" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jul 03 00:24:42 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jul 03 15:27:03 2006 -0700" }, "message": "[PATCH] lockdep: irqtrace subsystem, core\n\nAccurate hard-IRQ-flags and softirq-flags state tracing.\n\nThis allows us to attach extra functionality to IRQ flags on/off\nevents (such as trace-on/off).\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": "fc75cdfa5b43ac4d3232b490800cd35063adafd3", "tree": "0529ffd9633667457d5340a09b3cb352d09436d2", "parents": [ "04a3446c90137a473837288b04b517b19dc67a0d" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Sun Jun 25 05:49:10 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Jun 25 10:01:22 2006 -0700" }, "message": "[PATCH] cpu hotplug: fix CPU_UP_CANCEL handling\n\nIf a cpu hotplug callback fails on CPU_UP_PREPARE, all callbacks will be\ncalled with CPU_UP_CANCELED. A few of these callbacks assume that on\nCPU_UP_PREPARE a pointer to task has been stored in a percpu array. This\nassumption is not true if CPU_UP_PREPARE fails and the following calls to\nkthread_bind() in CPU_UP_CANCELED will cause an addressing exception\nbecause of passing a NULL pointer.\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.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": "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": "78eef01b0fae087c5fadbd85dd4fe2918c3a015f", "tree": "78057039596aa733ff904a36260cca3a51af6981", "parents": [ "ac2b898ca6fb06196a26869c23b66afe7944e52e" ], "author": { "name": "Andrew Morton", "email": "akpm@osdl.org", "time": "Wed Mar 22 00:08:16 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Mar 22 07:53:59 2006 -0800" }, "message": "[PATCH] on_each_cpu(): disable local interrupts\n\nWhen on_each_cpu() runs the callback on other CPUs, it runs with local\ninterrupts disabled. So we should run the function with local interrupts\ndisabled on this CPU, too.\n\nAnd do the same for UP, so the callback is run in the same environment on both\nUP and SMP. (strictly it should do preempt_disable() too, but I think\nlocal_irq_disable is sufficiently equivalent).\n\nAlso uninlines on_each_cpu(). softirq.c was the most appropriate file I could\nfind, but it doesn\u0027t seem to justify creating a new file.\n\nOh, and fix up that comment over (under?) x86\u0027s smp_call_function(). It\ndrives me nuts.\n\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a4c4af7c8dc1eccdfb8c57e1684f08179b4407e6", "tree": "210773f292da3ba85818402f1945ee7b14ba8c71", "parents": [ "cc658cfe3c66a6124b5a8db90cdcdd440201b1dc" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Mon Nov 07 00:58:38 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 07 07:53:29 2005 -0800" }, "message": "[PATCH] cpu hoptlug: avoid usage of smp_processor_id() in preemptible code\n\nReplace smp_processor_id() with any_online_cpu(cpu_online_map) in order to\navoid lots of \"BUG: using smp_processor_id() in preemptible [00000001]\ncode:...\" messages in case taking a cpu online fails.\n\nAll the traces start at the last notifier_call_chain(...) in kernel/cpu.c.\nSince we hold the cpu_control semaphore it shouldn\u0027t be any problem to access\ncpu_online_map.\n\nThe reason why cpu_up failed is simply that the cpu that was supposed to be\ntaken online wasn\u0027t even there. That is because on s390 we never know when a\nnew cpu comes and therefore cpu_possible_map consists of only ones and doesn\u0027t\nreflect reality.\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "3f74478b5fd7263e9311cdb320923d599c73a792", "tree": "d61962b55cc7bae06cf872f35d8ab3ae753c70c1", "parents": [ "459192c92cde49d1a2f721c90adf45d774c2dcf5" ], "author": { "name": "Andi Kleen", "email": "ak@suse.de", "time": "Mon Sep 12 18:49:24 2005 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Sep 12 10:49:58 2005 -0700" }, "message": "[PATCH] x86-64: Some cleanup and optimization to the processor data area.\n\n- Remove unused irqrsp field\n- Remove pda-\u003eme\n- Optimize set_softirq_pending slightly\n\nSigned-off-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "c70f5d6610c601ea2ae4ae4e49f66c80801e895f", "tree": "288ab7efcb1285474e7f7277002cba8de236bbf1", "parents": [ "6d1d07e41a1de478a0da3cc14b4a8054ef09931c" ], "author": { "name": "Andrew Morton", "email": "akpm@osdl.org", "time": "Sat Jul 30 10:22:49 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Jul 30 10:49:59 2005 -0700" }, "message": "[PATCH] revert bogus softirq changes\n\nThis snuck in with an x86_64 change. Thanks to Richard Purdie\n\u003crpurdie@rpsys.net\u003e for spotting it.\n\nCc: Andi Kleen \u003cak@muc.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "ed6b676ca8b50e0b538e61c283d52fd04f007abf", "tree": "753ea613ce334c41f835f6aac21074b137d24713", "parents": [ "3829ee6b1be03d5aa3005fe7d19f30088b539836" ], "author": { "name": "Andi Kleen", "email": "ak@suse.de", "time": "Thu Jul 28 21:15:49 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Jul 28 21:46:02 2005 -0700" }, "message": "[PATCH] x86_64: Switch to the interrupt stack when running a softirq in local_bh_enable()\n\nThis avoids some potential stack overflows with very deep softirq callchains.\ni386 does this too.\n\nTOADD CFI annotation\n\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": "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" } ] }