Re: Loss of PAT-WC after resume on i5
From: Chris Wilson
Date: Mon Jan 03 2011 - 11:21:56 EST
On Mon, 03 Jan 2011 08:01:05 -0800, "H. Peter Anvin" <hpa@xxxxxxxxx> wrote:
> Sounds like it. It sounds based on your description that it's something
> more fundamental than just the state of the PAT MSR being lost, too,
> although perhaps that's the first thing to check...
Right, I should have mentioned that a rdmsr(MSR_ISA32_CR_PAT) showed no
change across a dysfunctional resume. And that
/sys/kernel/debug/x86/pat_memtype_list had the same contents (just the
first entries reversed upon resume).
Chris Wilson, Intel Open Source Technology Centre
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