From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with SMTP id DEFF26B009E for ; Mon, 11 Oct 2010 22:17:08 -0400 (EDT) Received: from m3.gw.fujitsu.co.jp ([10.0.50.73]) by fgwmail6.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id o9C2H6ri004931 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Tue, 12 Oct 2010 11:17:07 +0900 Received: from smail (m3 [127.0.0.1]) by outgoing.m3.gw.fujitsu.co.jp (Postfix) with ESMTP id 516E745DE50 for ; Tue, 12 Oct 2010 11:17:06 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (s3.gw.fujitsu.co.jp [10.0.50.93]) by m3.gw.fujitsu.co.jp (Postfix) with ESMTP id 2229645DE54 for ; Tue, 12 Oct 2010 11:17:06 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id 0B9511DB8038 for ; Tue, 12 Oct 2010 11:17:06 +0900 (JST) Received: from m106.s.css.fujitsu.com (m106.s.css.fujitsu.com [10.249.87.106]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id BC3A31DB8042 for ; Tue, 12 Oct 2010 11:17:05 +0900 (JST) From: KOSAKI Motohiro Subject: Re: [resend][PATCH] mm: increase RECLAIM_DISTANCE to 30 In-Reply-To: References: Message-Id: <20101012111451.AD2E.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Tue, 12 Oct 2010 11:17:04 +0900 (JST) Sender: owner-linux-mm@kvack.org To: David Rientjes Cc: kosaki.motohiro@jp.fujitsu.com, Christoph Lameter , Balbir Singh , Mel Gorman , Rob Mueller , linux-kernel@vger.kernel.org, Bron Gondwana , linux-mm List-ID: > On Fri, 8 Oct 2010, Christoph Lameter wrote: > > > It implies that zone reclaim is going to be automatically enabled if the > > maximum latency to the memory farthest away is 3 times or more that of a > > local memory access. > > > > It doesn't determine what the maximum latency to that memory is, it relies > on whatever was defined in the SLIT; the only semantics of that distance > comes from the ACPI spec that states those distances are relative to the > local distance of 10. Right. but do we need to consider fake SLIT case? I know actually such bogus slit are there. but I haven't seen such fake SLIT made serious trouble. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org