From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756704AbbCMS4x (ORCPT ); Fri, 13 Mar 2015 14:56:53 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54051 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756584AbbCMS4u (ORCPT ); Fri, 13 Mar 2015 14:56:50 -0400 Message-ID: <550332CE.7040404@redhat.com> Date: Fri, 13 Mar 2015 14:56:14 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Eric B Munson , Andrew Morton CC: Vlastimil Babka , Thomas Gleixner , Christoph Lameter , Peter Zijlstra , Mel Gorman , David Rientjes , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH V5] Allow compaction of unevictable pages References: <1426267597-25811-1-git-send-email-emunson@akamai.com> In-Reply-To: <1426267597-25811-1-git-send-email-emunson@akamai.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/13/2015 01:26 PM, Eric B Munson wrote: > --- a/mm/compaction.c > +++ b/mm/compaction.c > @@ -1046,6 +1046,8 @@ typedef enum { > ISOLATE_SUCCESS, /* Pages isolated, migrate */ > } isolate_migrate_t; > > +int sysctl_compact_unevictable; > + > /* > * Isolate all pages that can be migrated from the first suitable block, > * starting at the block pointed to by the migrate scanner pfn within I suspect that the use cases where users absolutely do not want unevictable pages migrated are special cases, and it may make sense to enable sysctl_compact_unevictable by default.