Linux kernel documentation tree maintained by Jonathan Corbet http://mirrors.hust.edu.cn/git/lwn.git/atom?h=v2.6.34 2010-04-30T05:24:51+00:00 2010-04-30T05:24:51+00:00 Oleg Nesterov oleg@redhat.com 2010-04-30T05:23:51+00:00 urn:sha1:47dd5be2d6a82b8153e059a1d09eb3879d485bfd flush_delayed_work() always uses keventd_wq for re-queueing, but it should use the workqueue this dwork was queued on. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> 2009-12-10T17:35:44+00:00 Linus Torvalds torvalds@linux-foundation.org 2009-12-10T17:35:44+00:00 urn:sha1:d71cb81af3817193bc605de061da0499934263a6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: Add debugobjects support 2009-11-18T01:40:33+00:00 Tejun Heo tj@kernel.org 2009-11-17T22:06:20+00:00 urn:sha1:9398180097e359646d46083c3e079a54e20bee82 Commit 65a64464349883891e21e74af16c05d6e1eeb4e9 ("HWPOISON: Allow schedule_on_each_cpu() from keventd") which allows schedule_on_each_cpu() to be called from keventd added a race condition. schedule_on_each_cpu() may race with cpu hotplug and end up executing the function twice on a cpu. Fix it by moving direct execution into the section protected with get/put_online_cpus(). While at it, update code such that direct execution is done after works have been scheduled for all other cpus and drop unnecessary cpu != orig test from flush loop. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2009-11-15T16:09:48+00:00 Thomas Gleixner tglx@linutronix.de 2009-11-15T16:09:48+00:00 urn:sha1:dc186ad741c12ae9ecac8b89e317ef706fdaf8f6 Add debugobject support to track the life time of work_structs. While at it, remove duplicate definition of INIT_DELAYED_WORK_ON_STACK(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Tejun Heo <tj@kernel.org> 2009-10-29T15:20:00+00:00 Linus Torvalds torvalds@linux-foundation.org 2009-10-29T15:20:00+00:00 urn:sha1:3242f9804ba992c867360e2b57efc268b8e4e175 * 'hwpoison-2.6.32' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: HWPOISON: fix invalid page count in printk output HWPOISON: Allow schedule_on_each_cpu() from keventd HWPOISON: fix/proc/meminfo alignment HWPOISON: fix oops on ksm pages HWPOISON: Fix page count leak in hwpoison late kill in do_swap_page HWPOISON: return early on non-LRU pages HWPOISON: Add brief hwpoison description to Documentation HWPOISON: Clean up PR_MCE_KILL interface 2009-10-19T05:29:22+00:00 Andi Kleen ak@linux.intel.com 2009-10-14T04:22:47+00:00 urn:sha1:65a64464349883891e21e74af16c05d6e1eeb4e9 Right now when calling schedule_on_each_cpu() from keventd there is a deadlock because it tries to schedule a work item on the current CPU too. This happens via lru_add_drain_all() in hwpoison. Just call the function for the current CPU in this case. This is actually faster too. Debugging with Fengguang Wu & Max Asbock Signed-off-by: Andi Kleen <ak@linux.intel.com> 2009-10-14T22:11:35+00:00 Linus Torvalds torvalds@linux-foundation.org 2009-10-14T16:16:42+00:00 urn:sha1:8c53e46314562fe814b0afef6cfcbd2f562b017c It basically turns a delayed work into an immediate work, and then waits for it to finish, thus allowing you to force (and wait for) an immediate flush of a delayed work. We'll want to use this in the tty layer to clean up tty_flush_to_ldisc(). Acked-by: Oleg Nesterov <oleg@redhat.com> [ Fixed to use 'del_timer_sync()' as noted by Oleg ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2009-09-11T20:23:18+00:00 Linus Torvalds torvalds@linux-foundation.org 2009-09-11T20:23:18+00:00 urn:sha1:774a694f8cd08115d130a290d73c6d8563f26b1b * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (64 commits) sched: Fix sched::sched_stat_wait tracepoint field sched: Disable NEW_FAIR_SLEEPERS for now sched: Keep kthreads at default priority sched: Re-tune the scheduler latency defaults to decrease worst-case latencies sched: Turn off child_runs_first sched: Ensure that a child can't gain time over it's parent after fork() sched: enable SD_WAKE_IDLE sched: Deal with low-load in wake_affine() sched: Remove short cut from select_task_rq_fair() sched: Turn on SD_BALANCE_NEWIDLE sched: Clean up topology.h sched: Fix dynamic power-balancing crash sched: Remove reciprocal for cpu_power sched: Try to deal with low capacity, fix update_sd_power_savings_stats() sched: Try to deal with low capacity sched: Scale down cpu_power due to RT tasks sched: Implement dynamic cpu_power sched: Add smt_gain sched: Update the cpu_power sum during load-balance sched: Add SD_PREFER_SIBLING ... 2009-09-09T15:30:06+00:00 Mike Galbraith efault@gmx.de 2009-09-09T13:41:37+00:00 urn:sha1:61cbe54d9479ad98283b2dda686deae4c34b2d59 Removes kthread/workqueue priority boost, they increase worst-case desktop latencies. Signed-off-by: Mike Galbraith <efault@gmx.de> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1252486344.28645.18.camel@marge.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu> 2009-08-04T13:21:16+00:00 Bart Van Assche bart.vanassche@gmail.com 2009-07-30T17:00:53+00:00 urn:sha1:5b0f437df0a3e374d26ad533eb78fe64744f55a8 Two important aspects of the schedule_work() function are not yet documented: - that it is allowed to pass a struct work_struct * to this function that is already on the kernel-global workqueue; - the meaning of its return value. The patch below documents both aspects. Signed-off-by: Bart Van Assche <bart.vanassche@gmail.com> Cc: "Greg Kroah-Hartman" <gregkh@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <200907301900.54202.bart.vanassche@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>