From: Yan, Zheng <zheng.yan@oracle.com>
Date: Sun, 16 May 2010 14:49:59 +0000 (-0400)
Subject: Btrfs: Metadata ENOSPC handling for balance
X-Git-Tag: v2.6.35-rc1~36^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3fd0a5585eb98e074fb9934549c8d85c49756c0d;p=pandora-kernel.git

Btrfs: Metadata ENOSPC handling for balance

This patch adds metadata ENOSPC handling for the balance code.
It is consisted by following major changes:

1. Avoid COW tree leave in the phrase of merging tree.

2. Handle interaction with snapshot creation.

3. make the backref cache can live across transactions.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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