From 49eb7e46d47ea72a9bd2a5f8cedb04f5159cc277 Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Thu, 11 Sep 2008 15:53:12 -0400
Subject: [PATCH] Btrfs: Dir fsync optimizations

Drop i_mutex during the commit

Don't bother doing the fsync at all unless the dir is marked as dirtied
and needing fsync in this transaction.  For directories, this means
that someone has unlinked a file from the dir without fsyncing the
file.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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