tree fc6a1ea604e0bd5c3d22da891669e0516d776916
parent f2a09da9d0cba17ad4041e7e54f1ca840b12d0be
author Miao Xie <miaox@cn.fujitsu.com> 1374751354 +0800
committer Chris Mason <chris.mason@fusionio.com> 1378037073 -0400

Btrfs: don't cache the csum value into the extent state tree

Before applying this patch, we cached the csum value into the extent state
tree when reading some data from the disk, this operation increased the lock
contention of the state tree.

Now, we just store the csum value into the bio structure or other unshared
structure, so we can reduce the lock contention.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>