From: Dave Chinner <david@fromorbit.com>
To: Eric Sandeen <sandeen@redhat.com>
Cc: xfs-oss <xfs@oss.sgi.com>
Subject: Re: [PATCH] xfs_mdrestore: initialize sb prior to xfs_sb_from_disk()
Date: Fri, 6 Jun 2014 11:42:56 +1000 [thread overview]
Message-ID: <20140606014256.GD4453@dastard> (raw)
In-Reply-To: <53910482.1030909@redhat.com>
On Thu, Jun 05, 2014 at 07:00:02PM -0500, Eric Sandeen wrote:
> On 6/5/14, 6:56 PM, Dave Chinner wrote:
> > On Thu, Jun 05, 2014 at 06:09:16PM -0500, Eric Sandeen wrote:
>
> ...
>
> >> But ... should we maybe just do this once and for all in
> >> xfs_sb_from_disk? I'm not sure leaving it up to every
> >> caller is a good idea, unless somebody ahs a reason to
> >> pre-populate some fields - I can't imagine why that would
> >> be, though...
> >
> > We don't ever read in the CRC field into the in-memory structures
> > because it has no meaning in memory. Simiarly, we don't ever write
> > the CRC field from the in-core structure because we always
> > re-calculate it in the IO path if CRCs are configured. That is
> > consistent behaviour across the entire code-base.
>
> <snip stuff>
>
> > Perhaps we should move the memset() to within xfs_sb_from_disk()
> > to make this explicit?
>
> Yes, that's what I meant by "this" in "do this once and for all" -
> sorry, that wasn't clear. memset(0) in xfs_sb_from_disk().
I didn't read it clearly. my fault.
> Yeah, the more I think about it, the more I think that's probably
> the obviously correct thing to do.
*nod*
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2014-06-06 1:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-05 23:09 [PATCH] xfs_mdrestore: initialize sb prior to xfs_sb_from_disk() Eric Sandeen
2014-06-05 23:56 ` Dave Chinner
2014-06-06 0:00 ` Eric Sandeen
2014-06-06 1:42 ` Dave Chinner [this message]
2014-06-06 2:53 ` Eric Sandeen
2014-06-09 20:58 ` Eric Sandeen
2014-06-09 21:30 ` [PATCH V2] xfs: fix crc field handling in xfs_sb_to/from_disk Eric Sandeen
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