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Re: [Xen-devel] Xen linux error message: PCI-DMA: Out of SW-IOMMU space

To: Stefan Berger <stefanb@xxxxxxxxxx>
Subject: Re: [Xen-devel] Xen linux error message: PCI-DMA: Out of SW-IOMMU space for 65536 bytes at device 0000:02:01.0
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Sat, 08 Sep 2007 09:57:40 +0100
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On 7/9/07 20:01, "Stefan Berger" <stefanb@xxxxxxxxxx> wrote:

> You can change to e.g., a 128MB swiotlb by putting ‘swiotlb=128’ on
> you dom0 cmdline.


Not that I find this a good or intuitive solution, but at least now the error messages have disappeared. Couldn't this swiotlb grow automatically when needed?

No, it is allocated at boot time, and creating a larger one by default would waste memory on most systems.

 -- Keir
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