[OE-core] [PATCH] scripts/runqemu-internal: Work around qemux86 PAT bugs in linux 4.4.1

[Richard Purdie]

On Fri, 2016-02-12 at 17:04 -0500, Bruce Ashfield wrote:
> On 2016-02-12 1:00 PM, Richard Purdie wrote:
> > Since the upgrade of qemux86 to 4.4.1 we're seeing PAT issues when
> > starting the X server. We need to fix the problem but the failing
> > sanity tests mask out other issues and we need a workaround.
> > 
> 
> I was out of the day and didn't notice if any logs were available
> for the issue ? Is there a pointer to the failing logs ?
> 
> Obviously I didn't notice this in any of my runs. I'll check 4.4.x
> for anything that looks suspicious, and can bisect if needed.

Your inbox should have details of it under "poky: update qemu* to
prefer 4.4 kernel", the logs are in there. There was a promising
looking patch upstream but it didn't help.

It reproduced easily with a "MACHINE=qemux86 bitbake core-image-sato;
runqemu qemux86" and then watch X fail to start.

It also looks like we have a new perf race:

https://autobuilder.yoctoproject.org/main/builders/nightly-x86-64/build
s/657/steps/BuildImages/logs/stdio

Cheers,

Richard