Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932970Ab2FABBe (ORCPT ); Thu, 31 May 2012 21:01:34 -0400 Received: from mail.lang.hm ([64.81.33.126]:56159 "EHLO bifrost.lang.hm" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932942Ab2FABBd (ORCPT ); Thu, 31 May 2012 21:01:33 -0400 X-Greylist: delayed 891 seconds by postgrey-1.27 at vger.kernel.org; Thu, 31 May 2012 21:01:33 EDT Date: Thu, 31 May 2012 17:45:31 -0700 (PDT) From: david@lang.hm X-X-Sender: dlang@asgard.lang.hm To: KOSAKI Motohiro cc: Andi Kleen , Christoph Lameter , Linus Torvalds , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Dave Jones , Mel Gorman , stable@vger.kernel.org, hughd@google.com, sivanich@sgi.com Subject: Re: [PATCH 0/6] mempolicy memory corruption fixlet In-Reply-To: Message-ID: References: <1338368529-21784-1-git-send-email-kosaki.motohiro@gmail.com> <20120530184638.GU27374@one.firstfloor.org> <20120530193234.GV27374@one.firstfloor.org> <20120530201042.GY27374@one.firstfloor.org> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1063 Lines: 24 On Wed, 30 May 2012, KOSAKI Motohiro wrote: > On Wed, May 30, 2012 at 4:10 PM, Andi Kleen wrote: >>> Yes, that's right direction, I think. Currently, shmem_set_policy() can't handle >>> nonlinear mapping. >> >> I've been mulling for some time to just remove non linear mappings. >> AFAIK they were only useful on 32bit and are obsolete and could be >> emulated with VMAs instead. > > I agree. It is only userful on 32bit and current enterprise users don't use > 32bit anymore. So, I don't think emulated by vmas cause user visible issue. I wish this was true, there are a lot of systems out there still running 32 bit linux, even on 64 bit capible hardware. This is especially true in enterprises where they have either homegrown or proprietary software that isn't 64 bit clean. David Lang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/