From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Robert Hancock <hancockr@shaw.ca>
Cc: "Salyzyn, Mark" <mark_salyzyn@adaptec.com>,
James Bottomley <James.Bottomley@SteelEye.com>,
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: Thu, 24 May 2007 11:08:27 +0100 [thread overview]
Message-ID: <20070524110827.65e49b78@the-village.bc.nu> (raw)
In-Reply-To: <46552292.3090207@shaw.ca>
> > That didn't used to work right on the AMD boards when I tried it last as
> > we ended up with a buffer that was mapped by the IOMMU for some reason
> > and that was not below 2GB.
>
> The physical address you mean? If that is still happening then it needs
> to get fixed. The allocation should not succeed if it can't provide
> memory that's inside the DMA mask for the device..
But the allocation can succeed - using GFP_DMA at least you can do it as
you get memory below 2^24 you don't need to map via the IOMMU
next prev parent reply other threads:[~2007-05-24 10:04 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[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 [this message]
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
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
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