Re: [Xen-devel] qemu-xen-dir + PCI passthrough = BOOM

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

On Mon, Dec 16, 2013 at 10:08:16AM -0500, Konrad Rzeszutek Wilk wrote:
> On Fri, Dec 06, 2013 at 04:03:10PM +0000, Wei Liu wrote:
> > On Fri, Dec 06, 2013 at 04:00:18PM +0000, Wei Liu wrote:
> > [...]
> > > > Those Xen report something like:
> > > > (XEN) page_alloc.c:1460:d0 Over-allocation for domain 46: 131329 >
> > > > 131328
> > > > (XEN) memory.c:132:d0 Could not allocate order=0 extent: id=46
> > > > memflags=0 (62 of 64)
> > > > 
> > > > ?
> > > > 
> > > > (I tryied to reproduce the issue by simply add many emulated e1000 in
> > > > QEMU :) )
> > > > 

> -bash-4.1# lspci -s 01:00.0 -v 
> 01:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network 
> Connection (rev 01)
>         Subsystem: Intel Corporation Gigabit ET Dual Port Server Adapter
>         Flags: fast devsel, IRQ 16
>         Memory at fbc20000 (32-bit, non-prefetchable) [disabled] [size=128K]
>         Memory at fb800000 (32-bit, non-prefetchable) [disabled] [size=4M]
>         I/O ports at e020 [disabled] [size=32]
>         Memory at fbc44000 (32-bit, non-prefetchable) [disabled] [size=16K]
>         Expansion ROM at fb400000 [disabled] [size=4M]

BTW, I think this is the issue, the Expansion ROM. qemu-xen will
allocate memory for it. Will have maybe have to find another way.
qemu-trad those not seems to allocate memory, but I haven't been very
far in trying to check that.

-- 
Anthony PERARD

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