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authorTejun Heo <tj@kernel.org>2011-04-05 18:01:44 +0200
committerTejun Heo <tj@kernel.org>2011-05-20 13:54:46 +0200
commit9c5a2ba70251ecaab18c7a83e38b3c620223476c (patch)
treeece2c035b761af1332ea027f32443a6d05b16bc9 /Documentation
parent2543a87108d2af7d48a43b3d6685c2b1ea279e36 (diff)
workqueue: separate out drain_workqueue() from destroy_workqueue()
There are users which want to drain workqueues without destroying it. Separate out drain functionality from destroy_workqueue() into drain_workqueue() and make it accessible to workqueue users. To guarantee forward-progress, only chain queueing is allowed while drain is in progress. If a new work item which isn't chained from the running or pending work items is queued while draining is in progress, WARN_ON_ONCE() is triggered. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
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