Re: [Xen-devel] Re: [Patch] by default don't give all memory to dom0

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> You get a pretty clear BUG() message out if this happens. It actually
> tells you to enable 'swiotlb=force'!  The number of drivers that
> actually use multi-page buffers is really small -- we only fixed that
> case in 2.0 a few weeks ago.

The USB drivers I've worked with tended to use multipage buffers, although 
only the mass storage driver seemed to use really large numbers of pages.

Cheers,
Mark

> I'd rather not waste 64MB of pre-reserved bounce buffers on
> small-memory systems that almost certainly don't need bounce buffers.
>
>   -- Keir
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel