From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Christoph Lameter <clameter@sgi.com>
Cc: Andrew Morton <akpm@osdl.org>,
"Martin J. Bligh" <mbligh@mbligh.org>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>
Subject: Re: ZONE_DMA (was: Re: 2.6.19 -mm merge plans)
Date: Thu, 21 Sep 2006 02:03:50 +0100 [thread overview]
Message-ID: <1158800630.11109.72.camel@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.64.0609201724490.2403@schroedinger.engr.sgi.com>
Ar Mer, 2006-09-20 am 17:31 -0700, ysgrifennodd Christoph Lameter:
> ZONE_DMA does not have a bright future with IOMMUs and other things
> around. None of my system uses ZONE_DMA and I have a variety of them.
IOMMUs don't always help. They IOMMU aperture on AMD64 for example is
too high to help devices with below 32bit limits.
next prev parent reply other threads:[~2006-09-21 0:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060920135438.d7dd362b.akpm@osdl.org>
[not found] ` <4511D855.7050100@mbligh.org>
[not found] ` <20060920172253.f6d11445.akpm@osdl.org>
2006-09-21 0:31 ` ZONE_DMA (was: Re: 2.6.19 -mm merge plans) Christoph Lameter
2006-09-21 1:03 ` Alan Cox [this message]
2006-09-21 15:59 ` James Bottomley
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