From: Lachlan McIlroy <lachlan@sgi.com>
To: Lachlan McIlroy <lachlan@sgi.com>, xfs-dev <xfs-dev@sgi.com>,
xfs-oss <xfs@oss.sgi.com>
Subject: Re: [PATCH] Do not access buffers after dropping reference count
Date: Tue, 22 Jul 2008 12:55:52 +1000 [thread overview]
Message-ID: <48854C38.8050007@sgi.com> (raw)
In-Reply-To: <20080722022404.GH6761@disturbed>
Dave Chinner wrote:
> On Tue, Jul 22, 2008 at 12:16:45PM +1000, Lachlan McIlroy wrote:
>> We should not access a buffer after dropping it's reference count otherwise
>> we could race with another thread that releases the final reference count
>> and frees the buffer causing us to access potentially unmapped memory.
>
> Looks OK. The commit message should point out this is a problem
> only for DEBUG kernels, though.
Okay, will do.
prev parent reply other threads:[~2008-07-22 2:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-22 2:16 [PATCH] Do not access buffers after dropping reference count Lachlan McIlroy
2008-07-22 2:24 ` Dave Chinner
2008-07-22 2:55 ` Lachlan McIlroy [this message]
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