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
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at