tree f08e790405975124483bd49edcdcba6a0c4d8d8d
parent f0e615c3cb72b42191b558c130409335812621d8
author Chris Mason <chris.mason@oracle.com> 1303258360 -0400
committer Chris Mason <chris.mason@oracle.com> 1303258360 -0400

Btrfs: do some plugging in the submit_bio threads

The Btrfs submit bio threads have a small number of
threads responsible for pushing down bios we've collected
for a large number of devices.

Since we do all the bios for a single device at once,
we want to make sure we unplug and send down the bios
for each device as we're done processing them.

The new plugging API removed the btrfs code to
unplug while processing bios, this adds it back with
the new API.

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