Re: [Xen-users] DomU sees only 512MB RAM with PCI-passthrough

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

On Wed, May 22, 2013 at 05:06:18PM -0400, Konrad Rzeszutek Wilk wrote:
> On Thu, Dec 20, 2012 at 01:40:38PM +0100, Christian Holpert wrote:
> > Hello,
> > 
> > the output of xl -vvv create is attached for xen 4.2.1 with PCI and
> > without PCI.
> 
> Could you also attach the host dmesg please?

Nevermind. I can reproduce it. The interesting thing is that initially I had
this in my guest config:

maxmem=2048
memory=1024

and the output of the tools told me:
Memory: 1048576kB End of RAM: 0x20000 (PFN) Delta: 524288kB, PCI start: 
524288kB (0x20000 PFN), Balloon 1048576kB

.. and then it added that 1G to the end:

libxl_x86.c:201:e820_sanitize: :  [100000 -> 160000] RAM

and the guest booted nicely.

But if maxmem=memory I get:

Memory: 2097152kB End of RAM: 0x20000 (PFN) Delta: 1572864kB, PCI start: 
524288kB (0x20000 PFN), Balloon 0kB

And of course no E820 entry at 4G and guest crashes.

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