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From: Richard Purdie <richard.purdie@linuxfoundation.org>
To: Bruce Ashfield <bruce.ashfield@windriver.com>
Date: Sat, 13 Feb 2016 08:31:57 +0000
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Subject: Re: [PATCH 1/1] poky: update qemu* to prefer 4.4 kernel
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On Fri, 2016-02-12 at 15:32 +0000, Richard Purdie wrote:
> On Fri, 2016-02-12 at 14:36 +0000, Richard Purdie wrote:
> > A quick look at upstream makes me wonder about:
> > 
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/com
> > mi
> > t/?id=d9fe4fab11976e56b2e992980bf6ce948bdf02ac
> > 
> > which changes the code in this area.
> 
> FWIW this doesn't help, the problem still exists after applying it.
> 
> Setting CONFIG_X86_PAT to is not set in the defconfig did "fix" it,
> unsurprisingly.

Also, in the last set of builds, despite booting with "nopat", we see:

https://autobuilder.yoctoproject.org/main/builders/nightly-x86-lsb/buil
ds/637/steps/Running%20Sanity%20Tests/logs/stdio

Central error: [    9.298049] Failed to add WC MTRR for [fd000000-fdffffff]; performance may suffer.

Why we only see this on the lsb run I don't know but that address looks
like the one causing problems elsewhere with PAT. It could therefore
look like this is related to uvesafb.

Cheers,

Richard