From: Yan Zheng <zheng.yan@oracle.com>
Date: Fri, 7 Aug 2009 17:51:33 +0000 (-0400)
Subject: Btrfs: fix balancing oops when invalidate_inode_pages2 returns EBUSY
X-Git-Tag: v2.6.31-rc6~38^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ceab36edd3d3ad3ffd01d41d6d1e05ac1ff8357e;p=pandora-kernel.git

Btrfs: fix balancing oops when invalidate_inode_pages2 returns EBUSY

invalidate_inode_pages2_range may return -EBUSY occasionally
which results Oops. This patch fixes the issue by moving
invalidate_inode_pages2_range into a loop and keeping calling
it until the return value is not -EBUSY.

The EBUSY return is temporary, and can happen when the btrfs release page
function is unable to release a page because the EXTENT_LOCK
bit is set.

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

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