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Re: [PATCH 2/3] xfs: truncate delalloc extents when IO fails in writebac

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: [PATCH 2/3] xfs: truncate delalloc extents when IO fails in writeback
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Wed, 10 Mar 2010 04:12:37 -0500
Cc: xfs@xxxxxxxxxxx
In-reply-to: <1267667185-7736-3-git-send-email-david@xxxxxxxxxxxxx>
References: <1267667185-7736-1-git-send-email-david@xxxxxxxxxxxxx> <1267667185-7736-3-git-send-email-david@xxxxxxxxxxxxx>
User-agent: Mutt/1.5.19 (2009-01-05)
Btw, I can trigger the new warnings from this patch in xfsqa after
a few full XFSQA runs:

[39829.737139] Filesystem "vdb6": page discard on page c21d7480, inode
0x3f8, offset 0.
[39829.739488] Filesystem "vdb6": page discard failed delalloc mapping
lookup.
[39829.744005] Filesystem "vdb6": page discard on page c206ba80, inode
0x3f9, offset 0.
[39829.746496] Filesystem "vdb6": page discard failed delalloc mapping
lookup.
[39829.748655] Filesystem "vdb6": page discard on page c20e02a0, inode
0x3fa, offset 0.
[39829.751000] Filesystem "vdb6": page discard failed delalloc mapping
lookup.


going on for a few pages of kernel messages.

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