Btrfs: run the backing dev more often in the submit_bio helper
authorChris Mason <chris.mason@oracle.com>
Wed, 10 Mar 2010 20:33:32 +0000 (15:33 -0500)
committerChris Mason <chris.mason@oracle.com>
Mon, 15 Mar 2010 15:00:09 +0000 (11:00 -0400)
The submit_bio helper thread can decide to loop back around to
service more bios.  This commit forces it to unplug first, which helps
reduce the latency seen by submitters.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

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