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authorMike Snitzer <snitzer@redhat.com>2015-02-24 11:03:22 -0500
committerMike Snitzer <snitzer@redhat.com>2015-04-15 12:10:12 -0400
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dm: only run the queue on completion if congested or no requests pending
On really fast storage it can be beneficial to delay running the request_queue to allow the elevator more opportunity to merge requests. Otherwise, it has been observed that requests are being sent to q->request_fn much quicker than is ideal on IOPS-bound backends. Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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