tree c0c738e7c27e4ac6185f02acd76de64986218906
parent 0b485143d835c019cddc45f46e4b3873dcc9aa4e
author Liu Bo <liubo2009@cn.fujitsu.com> 1327608072 -0500
committer Chris Mason <chris.mason@oracle.com> 1327608072 -0500

Btrfs: do not defrag a file partially

xfstests 218 complains that btrfs defrags a file partially:
 After: 1
 Write backwards sync, but contiguous - should defrag to 1 extent
 Before: 10
-After: 1
+After: 2

To fix this, we need to set max_to_defrag count properly.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>