From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756560AbbDOVcx (ORCPT ); Wed, 15 Apr 2015 17:32:53 -0400 Received: from mga03.intel.com ([134.134.136.65]:6625 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753095AbbDOVcr (ORCPT ); Wed, 15 Apr 2015 17:32:47 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,583,1422950400"; d="scan'208";a="556717929" Message-ID: <552ED8FF.8000109@intel.com> Date: Wed, 15 Apr 2015 14:32:47 -0700 From: Dave Hansen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: Mel Gorman , Hugh Dickins CC: Rik van Riel , Linux-MM , Johannes Weiner , Andi Kleen , LKML Subject: Re: [PATCH 2/4] mm: Send a single IPI to TLB flush multiple pages when unmapping References: <1429094576-5877-1-git-send-email-mgorman@suse.de> <1429094576-5877-3-git-send-email-mgorman@suse.de> <552ED214.3050105@redhat.com> <20150415212855.GI14842@suse.de> In-Reply-To: <20150415212855.GI14842@suse.de> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/15/2015 02:28 PM, Mel Gorman wrote: > This is what I'm expecting i.e. clean->dirty transition is write-through > to the PTE which is now unmapped and it traps. I'm assuming there is an > architectural guarantee that it happens but could not find an explicit > statement in the docs. I'm hoping Dave or Andi can check with the relevant > people on my behalf. The docs do look a bit ambiguous to me. I'm working on getting some clarified language in there.