From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752902Ab0CQXUg (ORCPT ); Wed, 17 Mar 2010 19:20:36 -0400 Received: from mga01.intel.com ([192.55.52.88]:63544 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751615Ab0CQXUe (ORCPT ); Wed, 17 Mar 2010 19:20:34 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.51,261,1267430400"; d="scan'208";a="549980248" Subject: Re: [patch 2/2] x86,pat Convert memtype_lock into an rw_lock. From: Suresh Siddha Reply-To: Suresh Siddha To: "H. Peter Anvin" Cc: "holt@sgi.com" , Ingo Molnar , Thomas Gleixner , Venkatesh Pallipadi , Linux Kernel Mailing List , "x86@kernel.org" In-Reply-To: References: Content-Type: text/plain Organization: Intel Corp Date: Wed, 17 Mar 2010 16:19:18 -0800 Message-Id: <1268871558.2696.60.camel@sbs-t61.fm.intel.com> Mime-Version: 1.0 X-Mailer: Evolution 2.26.3 (2.26.3-1.fc11) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2010-03-17 at 12:51 -0700, H. Peter Anvin wrote: > Well, as you know :) tglx and I are on the road ... I'll try to get to it on Friday before I take off again. Also I talked to Thomas about this rwlock conversion and he referred to RT issues with rwlock. And the best is to avoid this using RCU. For now, the second patch can be perhaps dropped, as we are being proactive anyways. We can revisit this in the future. First patch "[patch 1/2] x86,pat Update the page flags for memtype atomically instead of using memtype_lock. -V3" is good to go. thanks, suresh