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Re: [Xen-devel] SWIOTLB allocation failed

To: Lukas Hejtmanek <xhejtman@xxxxxxxxxxx>
Subject: Re: [Xen-devel] SWIOTLB allocation failed
From: "Christopher S. Aker" <caker@xxxxxxxxxxxx>
Date: Tue, 04 Dec 2007 09:53:53 -0500
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Lukas Hejtmanek wrote:
On Tue, Nov 27, 2007 at 07:33:40PM +0530, pradeep singh rautela wrote:
Did you try using swiotlb=XYZ to solve your problem? XYZ is the amount
of the memory for swiotlb.
Did you get the same crash?

I noticed that using swiotlb=30000000 probably does not work at all as I got
the following:

That would attempt to assign 30 million 128k pages, or roughly 3.5 TB of memory towards the bounce buffer. I don't think you want that.

swiotlb defaults to 32 or 64 (I forget) -- try bumping it to 128 or 256.

-Chris


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