From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932195Ab1ACQVx (ORCPT ); Mon, 3 Jan 2011 11:21:53 -0500 Received: from mga01.intel.com ([192.55.52.88]:53081 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755230Ab1ACQVw (ORCPT ); Mon, 3 Jan 2011 11:21:52 -0500 Message-Id: <1bdc18$j527vf@fmsmga002.fm.intel.com> X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.60,267,1291622400"; d="scan'208";a="642850812" Date: Mon, 03 Jan 2011 16:21:09 +0000 To: "H. Peter Anvin" Subject: Re: Loss of PAT-WC after resume on i5 Cc: linux-kernel@vger.kernel.org, "Siddha, Suresh B" , Venkatesh Pallipadi In-Reply-To: <4D21F2C1.30500@zytor.com> References: <849307$b076ne@azsmga001.ch.intel.com> <4D21F2C1.30500@zytor.com> From: Chris Wilson Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 03 Jan 2011 08:01:05 -0800, "H. Peter Anvin" 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 -- Chris Wilson, Intel Open Source Technology Centre