The patch titled workqueue: remove redundant function invocation has been added to the -mm tree. Its filename is workqueue-remove-redundant-function-invocation.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: workqueue: remove redundant function invocation From: Andrew Liu <shengping.liu@xxxxxxxxxxxxx> timer_stats_timer_set_start_info is invoked twice, additionally, the invocation of this function can be moved to where it is only called when a delay is really required. Signed-off-by: Andrew Liu <shengping.liu@xxxxxxxxxxxxx> Cc: Pavel Machek <pavel@xxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Oleg Nesterov <oleg@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- kernel/workqueue.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff -puN kernel/workqueue.c~workqueue-remove-redundant-function-invocation kernel/workqueue.c --- a/kernel/workqueue.c~workqueue-remove-redundant-function-invocation +++ a/kernel/workqueue.c @@ -195,7 +195,6 @@ static void delayed_work_timer_fn(unsign int queue_delayed_work(struct workqueue_struct *wq, struct delayed_work *dwork, unsigned long delay) { - timer_stats_timer_set_start_info(&dwork->timer); if (delay == 0) return queue_work(wq, &dwork->work); @@ -219,11 +218,12 @@ int queue_delayed_work_on(int cpu, struc struct timer_list *timer = &dwork->timer; struct work_struct *work = &dwork->work; - timer_stats_timer_set_start_info(&dwork->timer); if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) { BUG_ON(timer_pending(timer)); BUG_ON(!list_empty(&work->entry)); + timer_stats_timer_set_start_info(&dwork->timer); + /* This stores cwq for the moment, for the timer_fn */ set_wq_data(work, wq_per_cpu(wq, raw_smp_processor_id())); timer->expires = jiffies + delay; @@ -564,7 +564,6 @@ EXPORT_SYMBOL(schedule_work); int schedule_delayed_work(struct delayed_work *dwork, unsigned long delay) { - timer_stats_timer_set_start_info(&dwork->timer); return queue_delayed_work(keventd_wq, dwork, delay); } EXPORT_SYMBOL(schedule_delayed_work); @@ -581,7 +580,6 @@ EXPORT_SYMBOL(schedule_delayed_work); int schedule_delayed_work_on(int cpu, struct delayed_work *dwork, unsigned long delay) { - timer_stats_timer_set_start_info(&dwork->timer); return queue_delayed_work_on(cpu, keventd_wq, dwork, delay); } EXPORT_SYMBOL(schedule_delayed_work_on); _ Patches currently in -mm which might be from shengping.liu@xxxxxxxxxxxxx are workqueue-remove-redundant-function-invocation.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html