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Message-ID: <43e72e890903161218o6896e58bqadc7e80f6a975bc0@mail.gmail.com> Date: Mon, 16 Mar 2009 12:18:12 -0700 From: "Luis R. Rodriguez" <mcgrof@...il.com> To: wireless <linux-wireless@...r.kernel.org>, joerg.roedel@....com Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, iommu@...ts.linux-foundation.org Subject: Re: AMD Quad core - PCI-DMA: Out of IOMMU space on > 4 GB RAM On Mon, Mar 16, 2009 at 12:15 PM, Luis R. Rodriguez <mcgrof@...il.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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