From: Alex Elder <aelder@sgi.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 5/8] xfs: prevent extsize alignment from exceeding maximum extent size
Date: Wed, 26 Jan 2011 15:22:55 -0600 [thread overview]
Message-ID: <1296076975.1980.942.camel@doink> (raw)
In-Reply-To: <1295945444-29488-6-git-send-email-david@fromorbit.com>
On Tue, 2011-01-25 at 19:50 +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner@redhat.com>
>
> When doing delayed allocation, if the allocation size is for a
> maximally sized extent, extent size alignment can push it over this
> limit. This results in an assert failure in xfs_bmbt_set_allf() as
> the extent length is too large to find in the extent record.
>
> Fix this by ensuring that we allow for space that extent size
> alignment requires (up to 2 * (extsize -1) blocks as we have to
> handle both head and tail alignment) when limiting the maximum size
> of the extent.
I think this is OK, however...
It seems to me that the XFS_FILBLKS_MIN() call you're making is
sort of magical because it pre-supposes exactly what the following
xfs_bmap_extsize_align() actually does. And because of that, I
would rather see that logic built into xfs_bmap_extsize_align()
itself. I haven't looked at it closely, but I presume the other
two spots that call xfs_bmap_extsize_align() would be subject to
the same MAXEXTLEN limit.
OK with me if you disagree though.
Reviewed-by: Alex Elder <aelder@sgi.com>
> Signed-off-by: Dave Chinner <dchinner@redhat.com>
> ---
> fs/xfs/xfs_bmap.c | 10 ++++++++++
> 1 files changed, 10 insertions(+), 0 deletions(-)
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next prev parent 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 [this message]
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
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
-- strict thread matches above, loose matches on Subject: below --
2011-01-27 3:53 [PATCH 0/8] xfs: candidate 2.6.38-rc fixes V3 Dave Chinner
2011-01-27 3:53 ` [PATCH 5/8] xfs: prevent extsize alignment from exceeding maximum extent size Dave Chinner
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