From: Christoph Hellwig <hch@infradead.org>
To: Lachlan McIlroy <lachlan@sgi.com>
Cc: xfs-dev <xfs-dev@sgi.com>, xfs-oss <xfs@oss.sgi.com>
Subject: Re: [PATCH V2] Don't do I/O beyond eof when unreserving space
Date: Wed, 3 Sep 2008 08:16:22 -0400 [thread overview]
Message-ID: <20080903121622.GA5980@infradead.org> (raw)
In-Reply-To: <48BE14BF.2010906@sgi.com>
On Wed, Sep 03, 2008 at 02:38:23PM +1000, Lachlan McIlroy wrote:
> When unreserving space with boundaries that are not block aligned we round
> up the start and round down the end boundaries and then use this function,
> xfs_zero_remaining_bytes(), to zero the parts of the blocks that got dropped
> during the rounding. The problem is we don't consider if these blocks are
> beyond eof. Worse still is if we encounter delayed allocations beyond eof
> we will try to use the magic delayed allocation block number as a real block
> number. If the file size is ever extended to expose these blocks then we'll
> go through xfs_zero_eof() to zero them anyway. Version 2 adds some comments.
Looks good.
prev parent reply other threads:[~2008-09-03 12:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-03 4:38 [PATCH V2] Don't do I/O beyond eof when unreserving space Lachlan McIlroy
2008-09-03 12:16 ` Christoph Hellwig [this message]
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