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authorLinus Torvalds <torvalds@linux-foundation.org>2014-12-11 18:48:45 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-11 18:48:45 -0800
commit0a27044c83fe8f52fd8fd1964d17fa7538ea0771 (patch)
treecd6df6ca2154c03249a6f64b62bca09fed1de686 /drivers/scsi/mvsas
parenteedb3d3304b59c64c811522f4ebaaf83124deeac (diff)
parent008847f66c38712f2819cd956969519006ebc11d (diff)
Merge branch 'for-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue update from Tejun Heo: "Work items which may be involved in memory reclaim path may be executed by the rescuer under memory pressure. When a rescuer gets activated, it processes whatever are on the pending list and then goes back to sleep until the manager kicks it again which involves 100ms delay. This is problematic for self-requeueing work items or the ones running on ordered workqueues as there always is only one work item on the pending list when the rescuer kicks in. The execution of that work item produces more to execute but the rescuer won't see them until after the said 100ms has passed, so such workqueues would only execute one work item every 100ms under prolonged memory pressure, which BTW may be being prolonged due to the slow execution. Neil wrote up a patch which fixes this issue by keeping the rescuer working as long as the target workqueue is busy but doesn't have enough workers" * 'for-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: allow rescuer thread to do more work. workqueue: invert the order between pool->lock and wq_mayday_lock workqueue: cosmetic update in rescuer_thread()
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