From: Christoph Hellwig <hch@infradead.org>
Date: Mon, 19 Oct 2009 04:00:03 +0000 (+0000)
Subject: xfs: I/O completion handlers must use NOFS allocations
X-Git-Tag: v2.6.33-rc1~312^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=80641dc66a2d6dfb22af4413227a92b8ab84c7bb;p=pandora-kernel.git

xfs: I/O completion handlers must use NOFS allocations

When completing I/O requests we must not allow the memory allocator to
recurse into the filesystem, as we might deadlock on waiting for the
I/O completion otherwise.  The only thing currently allocating normal
GFP_KERNEL memory is the allocation of the transaction structure for
the unwritten extent conversion.  Add a memflags argument to
_xfs_trans_alloc to allow controlling the allocator behaviour.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Thomas Neumann <tneumann@users.sourceforge.net>
Tested-by: Thomas Neumann <tneumann@users.sourceforge.net>
Reviewed-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
---

Reading git-diff-tree failed