From: David Chinner <dgc@sgi.com>
Date: Mon, 14 May 2007 08:24:09 +0000 (+1000)
Subject: [XFS] Sleeping with the ilock waiting for I/O completion is Bad.
X-Git-Tag: v2.6.23-rc1~1056^2~34
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=40095b64f5da601a8ab61fbe4b40feb46830052e;p=pandora-kernel.git

[XFS] Sleeping with the ilock waiting for I/O completion is Bad.

Recent fixes to the filesystem freezing code introduced a vn_iowait call
in the middle of the sync code. Unfortunately, at the point where this
call was added we are holding the ilock. The ilock is needed by I/O
completion for unwritten extent conversion and now updating the file size.
Hence I/o cannot complete if we hold the ilock while waiting for I/O
completion.

Fix up the bug and clean the code up around it.

SGI-PV: 963674
SGI-Modid: xfs-linux-melb:xfs-kern:28566a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
---

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