[Pkg-xen-devel] Bug#639112: DomU access to dual-ported RAM area on PCI card fails

Ian Campbell ijc at hellion.org.uk
Tue Jul 17 07:45:43 UTC 2012


On Mon, 2012-07-16 at 08:53 +0200, "David Müller (ELSOFT AG)" wrote:
> Hello
> 
> Ian Campbell wrote:
> > Are the resources which you are trying to map from inside the domU 
> > correctly represented in the PCI device's BARs?
> 
> Yes (AFAICS). BAR0 of the device requests 4kB of memory space, and this
> is correctly reported under "/sys/class/uio/uio0/maps/map0/".
> 
> > I suspect that it would be worthwhile to try the Wheezy 3.2 based
> > kernel in your domU.
> 
> Wouldn't it make sense to upgrade the whole installation (dom0 + domU)
> to Wheezy, not just the domU?

You could try it, I suggested domU first because I think that's the most
likely location of the bug, but if that doesn't work then upgrading the
dom0 would be worth a go too. Doing them separately lets us point a
finger at which one was buggy.

Ian.

-- 
Ian Campbell


And 1.1.81 is officially BugFree(tm), so if you receive any bug-reports
on it, you know they are just evil lies.
		-- Linus Torvalds



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