From: Jeff Garzik <jgarzik@pobox.com>
To: Ed Sweetman <safemode@comcast.net>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: pci-dma disables iommu on nforce4 motherboards?
Date: Sat, 24 Dec 2005 10:53:13 -0500 [thread overview]
Message-ID: <43AD6EE9.8080707@pobox.com> (raw)
In-Reply-To: <43AD674F.1040008@comcast.net>
Ed Sweetman wrote:
> I have an asus A8N-E motherboard and recieve the following message on boot.
> PCI-DMA: Disabling IOMMU.
>
> I have no issues with anything not functioning. I guess i'm just
> curious as to why this is done and if i'm missing out on any sort of
> performance gain by not using the iommu. I have less than 4GB of ram,
> would that be why it's disabled (which is why i think it is)? -
What happens if you boot with iommu=force ?
Jeff
next prev parent reply other threads:[~2005-12-24 15:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-24 15:20 pci-dma disables iommu on nforce4 motherboards? Ed Sweetman
2005-12-24 15:53 ` Jeff Garzik [this message]
[not found] <5njvv-JD-11@gated-at.bofh.it>
2005-12-24 23:37 ` Robert Hancock
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