Re: Bug: Limitation of <=2GB RAM in domU persists with 4.3.0

[Gordan Bobic <gordan@bobich.net>]

 On Wed, 24 Jul 2013 10:08:13 -0400, Konrad Rzeszutek Wilk 
 <konrad.wilk@oracle.com> wrote:
> On Tue, Jul 23, 2013 at 11:34:00PM +0100, Gordan Bobic wrote:
>> I just built 4.3.0 in order to get > 2GB of RAM in domU with GPU
>> passthrough without crashes. Unfortunately, the same crashes still
>> happen. Massive frame buffer corruption on domU before it locks up
>> solid. It seems the PCI memory stomp is still happening.
>>
>
> If you boot Xen with guest_loglvl=all
>
> and then run the guest the consoel (xl dmesg) should also have
> the output from QEMU - that will help in seeing how it constructs
> the E820 (which was the problem last time).

 I will gather this tonight - apologies, I forgot that I removed
 the loglvl=all options from my boot config.

> Are you also able to get the serial log from the guest? (IF this is
> Linux?) I usually have this in my guest config:
>
> serial='pty'
>
> and when Linux boots up I add 'console=ttyS0,115200 loglevel=8 debug'
> which will output everything to the 'xl console <guest> | tee 
> /tmp/log'.

 The intended guest is XP64. I will, however, get a Linux guest up
 and running with the exact same domU config (apart from the disk
 volume) for debugging this.

 Gordan