From: Linus Torvalds Date: Wed, 3 Jul 2013 02:53:30 +0000 (-0700) Subject: Merge branch 'for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq X-Git-Tag: v3.12-rc1~526 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f317ff9eed763e99bd226a447f93d42509434f43;p=kernel%2Fkernel-generic.git Merge branch 'for-3.11' of git://git./linux/kernel/git/tj/wq Pull workqueue changes from Tejun Heo: "Surprisingly, Lai and I didn't break too many things implementing custom pools and stuff last time around and there aren't any follow-up changes necessary at this point. The only change in this pull request is Viresh's patches to make some per-cpu workqueues to behave as unbound workqueues dependent on a boot param whose default can be configured via a config option. This leads to higher processing overhead / lower bandwidth as more work items are bounced across CPUs; however, it can lead to noticeable powersave in certain configurations - ~10% w/ idlish constant workload on a big.LITTLE configuration according to Viresh. This is because per-cpu workqueues interfere with how the scheduler perceives whether or not each CPU is idle by forcing pinned tasks on them, which makes the scheduler's power-aware scheduling decisions less effective. Its effectiveness is likely less pronounced on homogenous configurations and this type of optimization can probably be made automatic; however, the changes are pretty minimal and the affected workqueues are clearly marked, so it's an easy gain for some configurations for the time being with pretty unintrusive changes." * 'for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: fbcon: queue work on power efficient wq block: queue work on power efficient wq PHYLIB: queue work on system_power_efficient_wq workqueue: Add system wide power_efficient workqueues workqueues: Introduce new flag WQ_POWER_EFFICIENT for power oriented workqueues --- f317ff9eed763e99bd226a447f93d42509434f43