From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with SMTP id 84C1C6B004D for ; Fri, 10 Jul 2009 09:47:41 -0400 (EDT) Received: from m6.gw.fujitsu.co.jp ([10.0.50.76]) by fgwmail6.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id n6AECeO7024904 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Fri, 10 Jul 2009 23:12:41 +0900 Received: from smail (m6 [127.0.0.1]) by outgoing.m6.gw.fujitsu.co.jp (Postfix) with ESMTP id 5387A45DE50 for ; Fri, 10 Jul 2009 23:12:40 +0900 (JST) Received: from s6.gw.fujitsu.co.jp (s6.gw.fujitsu.co.jp [10.0.50.96]) by m6.gw.fujitsu.co.jp (Postfix) with ESMTP id 3036645DE4F for ; Fri, 10 Jul 2009 23:12:40 +0900 (JST) Received: from s6.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s6.gw.fujitsu.co.jp (Postfix) with ESMTP id EA6331DB803F for ; Fri, 10 Jul 2009 23:12:39 +0900 (JST) Received: from ml11.s.css.fujitsu.com (ml11.s.css.fujitsu.com [10.249.87.101]) by s6.gw.fujitsu.co.jp (Postfix) with ESMTP id A2DCC1DB803E for ; Fri, 10 Jul 2009 23:12:39 +0900 (JST) Message-ID: <9f3ffbd617047982a7aed71548a34f13.squirrel@webmail-b.css.fujitsu.com> In-Reply-To: <20090710134228.GX356@random.random> References: <20090707165101.8c14b5ac.kamezawa.hiroyu@jp.fujitsu.com> <20090707084750.GX2714@wotan.suse.de> <20090707180629.cd3ac4b6.kamezawa.hiroyu@jp.fujitsu.com> <20090708173206.GN356@random.random> <20090710134228.GX356@random.random> Date: Fri, 10 Jul 2009 23:12:38 +0900 (JST) Subject: Re: [RFC][PATCH 0/4] ZERO PAGE again v2 From: "KAMEZAWA Hiroyuki" MIME-Version: 1.0 Content-Type: text/plain;charset=iso-2022-jp Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Andrea Arcangeli Cc: Hugh Dickins , KAMEZAWA Hiroyuki , Nick Piggin , "linux-mm@kvack.org" , avi@redhat.com, akpm@linux-foundation.org, torvalds@linux-foundation.org List-ID: Andrea Arcangeli さんは書きました： > On Fri, Jul 10, 2009 at 12:18:07PM +0100, Hugh Dickins wrote: >> as an "automatic" KSM page, I don't know; or we'll need to teach KSM >> not to waste its time remerging instances of the ZERO_PAGE to a >> zeroed KSM page. We'll worry about that once both sets in mmotm. > > There is no risk of collision, zero page is not anonymous so... > > I think it's a mistake for them not to try ksm first regardless of the > new zeropage patches being floating around, because my whole point is > that those kind of apps will save more than just zero page with > ksm. Sure not guaranteed... but possible and worth checking. > How many mercyless teachers who know waht is correct there are... BTW, ksm has no refcnt pingpong problem ? Thanks, -Kame -- 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