From: "Robert P. J. Day" <rpjday@mindspring.com>
To: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Aubrey Li <aubreylee@gmail.com>,
Christoph Lameter <clameter@sgi.com>,
Bernhard Walle <bwalle@suse.de>,
linux-scsi@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] [scsi] Remove __GFP_DMA
Date: Wed, 23 May 2007 11:55:25 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0705231153360.7749@localhost.localdomain> (raw)
In-Reply-To: <1179933494.3700.16.camel@mulgrave.il.steeleye.com>
On Wed, 23 May 2007, James Bottomley wrote:
> I'll defer to Mark on this one. However, please remember that you
> can't just blindly remove GFP_DMA ... there are some cards which
> require it.
>
> Aacraid is one example ... it has a set of cards that can only DMA
> to 31 bits. For them, the GFP_DMA is necessary: The allocation in
> question is a scatterlist, which must be within the device DMA mask.
a question i asked a while back, and still haven't seen an answer for
-- given this in include/linux/gfp.h:
#define GFP_DMA __GFP_DMA
is there a qualitative difference between these two macros? is there
*supposed* to be? if there isn't, one would think that just one
variation would be sufficient.
rday
--
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA
http://fsdev.net/wiki/index.php?title=Main_Page
========================================================================
next prev parent reply other threads:[~2007-05-23 15:56 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-21 15:15 Bernhard Walle
2007-05-22 21:44 ` Christoph Lameter
2007-05-23 2:41 ` Aubrey Li
2007-05-23 15:18 ` James Bottomley
2007-05-23 15:55 ` Robert P. J. Day [this message]
2007-05-23 16:17 ` James Bottomley
2007-05-23 19:17 ` Salyzyn, Mark
2007-05-23 19:38 ` Alan Cox
2007-05-27 19:46 ` James Bottomley
2007-05-24 13:24 ` Salyzyn, Mark
2007-05-24 14:59 ` James Bottomley
2007-05-24 17:00 ` Christoph Lameter
2007-05-24 17:15 ` James Bottomley
2007-05-24 17:22 ` Christoph Lameter
2007-05-24 17:26 ` James Bottomley
2007-05-24 16:59 ` Christoph Lameter
[not found] <fa.6bUV4KR+za7HW4tT2WBlccqvoq0@ifi.uio.no>
[not found] ` <fa.NYl60pD1cwd1ESdKNCPaOwSz1WA@ifi.uio.no>
[not found] ` <fa.hW9tQQfgwmXj0gAKQoWXOxVzpvk@ifi.uio.no>
[not found] ` <fa.xLFpJ54sTvGq6YIol2Ew31Rrq2s@ifi.uio.no>
[not found] ` <fa.JZsPKKyEKOAfxp6reMY5ZwSNjQU@ifi.uio.no>
[not found] ` <fa.txrEcCPLxIukzeVBv7UG39WubcI@ifi.uio.no>
2007-05-24 5:28 ` Robert Hancock
2007-05-24 10:08 ` Alan Cox
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