git.kernel.dk Git - linux-2.6-block.git/commit

author	Miao Xie <miaox@cn.fujitsu.com>
	Fri, 12 Sep 2014 10:43:54 +0000 (18:43 +0800)
committer	Chris Mason <clm@fb.com>
	Wed, 17 Sep 2014 20:38:50 +0000 (13:38 -0700)
commit	23ea8e5a07673127d05cb5cf6f9914d7a53e0847
tree	58199f4b68c72a1a6c4d0be4cf6ab917ecdcb070	tree \| snapshot
parent	c3929c3624e1764855e5a452728aec201b18b42a	commit \| diff

Btrfs: load checksum data once when submitting a direct read io

The current code would load checksum data for several times when we split
a whole direct read io because of the limit of the raid stripe, it would
make us search the csum tree for several times. In fact, it just wasted time,
and made the contention of the csum tree root be more serious. This patch
improves this problem by loading the data at once.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>

fs/btrfs/btrfs_inode.h		diff \| blob \| blame \| history
fs/btrfs/ctree.h		diff \| blob \| blame \| history
fs/btrfs/extent_io.c		diff \| blob \| blame \| history
fs/btrfs/file-item.c		diff \| blob \| blame \| history
fs/btrfs/inode.c		diff \| blob \| blame \| history