tree ae5cb912cdc3a36a0aa7d43a554658821e0a6161
parent f4ac904c411b55e58bb240f332f93db2455f0010
author Miao Xie <miaox@cn.fujitsu.com> 1312536755 +0000
committer Chris Mason <chris.mason@oracle.com> 1313543371 -0400

Btrfs: fix wrong free space information

Btrfs subtracted the size of the allocated space twice when it allocated
the space from the bitmap in the cluster, it broke the free space information
and led to oops finally.

And this patch also fixes the bug that ctl->free_space was subtracted
without lock.

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