From: Andy Warner <andyw@pobox.com>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: linux-ide@vger.kernel.org
Subject: Re: WARN_ON(buflen > PAGE_SIZE) libata-core.c
Date: Thu, 16 Sep 2004 21:34:50 -0500 [thread overview]
Message-ID: <20040916213450.A14950@florence.linkmargin.com> (raw)
In-Reply-To: <414A34A6.1020506@pobox.com>; from jgarzik@pobox.com on Thu, Sep 16, 2004 at 08:49:42PM -0400
Jeff Garzik wrote:
> [...]
> > In libata-core.c:ata_sg_init_one() there is:
> >
> > WARN_ON(buflen > PAGE_SIZE);
> [...]
> A non-scatter-gather transfer is assumed to be one page in length, using
> only a single 'struct scatterlist' element. You could probably "cheat"
> and indicate the scatterlist element is longer than PAGE_SIZE, but make
> sure to review all code paths...
Bear with me, if I'm being dense, but why is that a valid
assumption ? Is it because in most instances, such requests
are made by filesystem code, as opposed to arbitrary user
initiated I/O ?
--
andyw@pobox.com
Andy Warner Voice: (612) 801-8549 Fax: (208) 575-5634
next prev parent reply other threads:[~2004-09-17 2:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-01 20:08 WARN_ON(buflen > PAGE_SIZE) libata-core.c Andy Warner
2004-09-17 0:49 ` Jeff Garzik
2004-09-17 2:34 ` Andy Warner [this message]
2004-09-17 2:39 ` Jeff Garzik
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