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Re: [Xen-devel] PCI hole resize support for 4.5? If not, workaround?

On 10/20/2014 6:06, Don Slutz wrote:
On 10/18/14 02:17, Steve Freitas wrote:
Hi all,

I'm suffering from bug 28 [1], unable to assign more than 3.5 gigs of RAM to my Windows VM while using VGA passthrough. This is a showstopper for me.

Since #28 is still listed as up for grabs for 4.5 [2], I assume a fix is not likely to make it in. However, a message from Ian [3] indicated that a workaround was available at some point. Will a workaround be offered for 4.4 or 4.5?

Adding the patch:


to 4.5-unstable

and adding

mmio_hole_size = 536870912

to your .xfg should allow you to use more memory (the number above
is .5 gig, which should work based on 3.5 gigs working).

Hi Don!

Thanks for your reply and the patch, my searches didn't turn up your post. Any idea if I'll run into trouble trying to apply this to 4.4.1? I'd like to stick with (minimally modified) distro packages if possible, and Debian Jessie is on 4.4.1. And any feeling for whether this will make it into 4.5? Sure would be nice to see this problem fixed for good.

Thanks again.


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