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authorTejun Heo <htejun@gmail.com>2006-01-12 15:39:26 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-12 09:05:39 -0800
commit1bc691d357c646700b9523d2aeca02847d3fb3f4 (patch)
tree430e13982f894c44e4a33dee188b3c718ec989ed /Documentation/powerpc
parent593195f9b2309693f27b402f34573f7920b82c3e (diff)
[PATCH] fix queue stalling while barrier sequencing
If ordered tag isn't supported, request ordering for barrier sequencing is performed by queue draining, which basically hangs the request queue until elv_completed_request() reports completion of all previous fs requests. The condition check in elv_completed_request() was only performed for fs requests. If a special request is queued between the last to-be-drained request and the barrier sequence, draining is never completed and the queue is stalled forever. This patch moves the end-of-draining condition check such that it's performed for all requests. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/powerpc')
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