From: "Luis R. Rodriguez" <mcgrof@gmail.com>
To: wireless <linux-wireless@vger.kernel.org>, joerg.roedel@amd.com
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
iommu@lists.linux-foundation.org
Subject: Re: AMD Quad core - PCI-DMA: Out of IOMMU space on > 4 GB RAM
Date: Mon, 16 Mar 2009 12:18:12 -0700 [thread overview]
Message-ID: <43e72e890903161218o6896e58bqadc7e80f6a975bc0@mail.gmail.com> (raw)
In-Reply-To: <43e72e890903161215u343cbb19v6d6cbf36794e252a@mail.gmail.com>
On Mon, Mar 16, 2009 at 12:15 PM, Luis R. Rodriguez <mcgrof@gmail.com> wrote:
> I've run into "PCI-DMA: Out of IOMMU space" messages after loading and
> unloading a module 30 times. The interesting thing is this only
> happens if I have > 4 GB of memory. The box this occurs has AMD Phenom
> quad core CPU so I take it a harware IOMMU is being used. Below are
> example relevant messages with > 4 GB and then < 4 GB of memory. The
> driver I tested this with was ath9k. It could be an issue perhaps with
> ath9k but I am unable to find an issue in our probe/removal.
>
> Could this be an issue with the AMD IOMMU used? Or is it more likely a
> driver issue?
I forgot to mention I'm using l Linus 2.6.29-rc8 with some
serialization patches applied for ath9k (which are unrelated to
DMA/IOMMU/probe) [1].
http://www.kernel.org/pub/linux/kernel/people/mcgrof/patches/ath9k/2009-03-12/serialization-v6/for-2.6.29/
Luis
next prev parent reply other threads:[~2009-03-16 19:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-16 19:15 Luis R. Rodriguez
2009-03-16 19:18 ` Luis R. Rodriguez [this message]
2009-03-17 0:35 ` FUJITA Tomonori
2009-03-17 1:13 ` Luis R. Rodriguez
2009-03-23 17:09 ` Luis R. Rodriguez
2009-03-17 7:45 ` Joerg Roedel
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