Btrfs: optimize back reference update during btrfs_drop_snapshot
authorYan, Zheng <zheng.yan@oracle.com>
Fri, 9 Oct 2009 13:25:16 +0000 (09:25 -0400)
committerChris Mason <chris.mason@oracle.com>
Fri, 9 Oct 2009 13:25:16 +0000 (09:25 -0400)
commit94fcca9f8999e7828d5f4dc181daa39cad2af38a
tree68842517a4d10d080bc4f70abae19e480d2ac049
parentefefb1438be269897585934fc6c05deb4dfa01ce
Btrfs: optimize back reference update during btrfs_drop_snapshot

This patch reading level 0 tree blocks that already use full backrefs.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
fs/btrfs/extent-tree.c