From: Chris Mason Date: Fri, 5 Sep 2008 20:13:11 +0000 (-0400) Subject: Btrfs: Add a write ahead tree log to optimize synchronous operations X-Git-Tag: v2.6.29-rc1~27^2~9^2~55^2~56^2~30^2~24 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e02119d5a7b4396c5a872582fddc8bd6d305a70a;p=pandora-kernel.git Btrfs: Add a write ahead tree log to optimize synchronous operations File syncs and directory syncs are optimized by copying their items into a special (copy-on-write) log tree. There is one log tree per subvolume and the btrfs super block points to a tree of log tree roots. After a crash, items are copied out of the log tree and back into the subvolume. See tree-log.c for all the details. Signed-off-by: Chris Mason --- Reading git-diff-tree failed