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From: Alex Elder <aelder@sgi.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 6/8] xfs: limit extsize to size of AGs and/or MAXEXTLEN
Date: Wed, 26 Jan 2011 15:23:02 -0600	[thread overview]
Message-ID: <1296076982.1980.943.camel@doink> (raw)
In-Reply-To: <1295945444-29488-7-git-send-email-david@fromorbit.com>

On Tue, 2011-01-25 at 19:50 +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner@redhat.com>
> 
> The extent size hint can be set to larger than an AG. This means
> that the alignment process can push the range to be allocated
> outside the bounds of the AG, resulting in assert failures or
> corrupted bmbt records. Similarly, if the extsize is larger than the
> maximum extent size supported, the alignment process will produce
> extents that are too large to fit into the bmbt records, resulting
> in a different type of assert/corruption failure.
> 
> Fix this by limiting extsize at the time іt is set firstly to be
> less than MAXEXTLEN, then to be a maximum of half the size of the
> AGs in the filesystem for non-realtime inodes. Realtime inodes do
> not allocate out of AGs, so don't have to be restricted by the size
> of AGs.

Looks good.

Reviewed-by: Alex Elder <aelder@sgi.com>

> Signed-off-by: Dave Chinner <dchinner@redhat.com>
> Reviewed-by: Christoph Hellwig <hch@lst.de>


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  reply	other threads:[~2011-01-26 21:20 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-25  8:50 [PATCH 0/8] xfs: 2.6.38-rc candidate fixes V2 Dave Chinner
2011-01-25  8:50 ` [PATCH 1/8] xfs: fix log ticket leak on forced shutdown Dave Chinner
2011-01-26 21:22   ` Alex Elder
2011-01-25  8:50 ` [PATCH 2/8] xfs: fix efi item " Dave Chinner
2011-01-25 23:53   ` Christoph Hellwig
2011-01-27  0:35     ` Dave Chinner
2011-01-26 21:22   ` Alex Elder
2011-01-25  8:50 ` [PATCH 3/8] xfs: speculative delayed allocation uses rounddown_power_of_2 badly Dave Chinner
2011-01-26 21:22   ` Alex Elder
2011-01-25  8:50 ` [PATCH 4/8] xfs: limit extent length for allocation to AG size Dave Chinner
2011-01-26 21:22   ` Alex Elder
2011-01-27  0:38     ` Dave Chinner
2011-01-25  8:50 ` [PATCH 5/8] xfs: prevent extsize alignment from exceeding maximum extent size Dave Chinner
2011-01-25  9:49   ` Christoph Hellwig
2011-01-26 21:22   ` Alex Elder
2011-01-27  0:50     ` Dave Chinner
2011-01-25  8:50 ` [PATCH 6/8] xfs: limit extsize to size of AGs and/or MAXEXTLEN Dave Chinner
2011-01-26 21:23   ` Alex Elder [this message]
2011-01-25  8:50 ` [PATCH 7/8] xfs: handle CIl transaction commit failures correctly Dave Chinner
2011-01-25  9:53   ` Christoph Hellwig
2011-01-26 21:23   ` Alex Elder
2011-01-25  8:50 ` [PATCH 8/8] xfs: fix dquot shaker deadlock Dave Chinner
2011-01-25  9:52   ` Christoph Hellwig
2011-01-27  1:54     ` Dave Chinner
2011-01-27  2:24       ` Dave Chinner
2011-01-26 21:23   ` Alex Elder
2011-01-25  9:20 ` [PATCH 0/8] xfs: 2.6.38-rc candidate fixes V2 Christoph Hellwig
2011-01-26 21:23 ` Alex Elder
2011-01-27  3:53 [PATCH 0/8] xfs: candidate 2.6.38-rc fixes V3 Dave Chinner
2011-01-27  3:53 ` [PATCH 6/8] xfs: limit extsize to size of AGs and/or MAXEXTLEN Dave Chinner

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