Re: [Xen-devel] Re: Out sw-iommu space problem

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Thu, Oct 20, 2011 at 04:28:49AM -0700, Fantu wrote:
> After setting swiotlb=65762 on vmlinuz (from 64 mb to 128 mb) problem solved.

OK. I am not sure why your driver is using that much space, but that is 
the purpose of the argument.

> Is swiotlb set on vmlinux bugged? At this time on 2.6.32 pv_ops, in order to
> set size in MB requires this calculation: swiotlb=N where N/1024*2=MB

That is correct. It is correct for any kernel since 2.6.18 I believe. Unless
the swiotlb in the Xen old-style was doing something different.

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