From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id 522686B003D for ; Wed, 29 Apr 2009 20:39:05 -0400 (EDT) Received: from mt1.gw.fujitsu.co.jp ([10.0.50.74]) by fgwmail6.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id n3U0deIO010874 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Thu, 30 Apr 2009 09:39:40 +0900 Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 16E8145DE4F for ; Thu, 30 Apr 2009 09:39:40 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id E943B45DE4E for ; Thu, 30 Apr 2009 09:39:39 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id C9CD51DB803B for ; Thu, 30 Apr 2009 09:39:39 +0900 (JST) Received: from ml13.s.css.fujitsu.com (ml13.s.css.fujitsu.com [10.249.87.103]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 887141DB8037 for ; Thu, 30 Apr 2009 09:39:39 +0900 (JST) From: KOSAKI Motohiro Subject: Re: [PATCH] vmscan: evict use-once pages first (v3) In-Reply-To: <20090429131436.640f09ab@cuia.bos.redhat.com> References: <2f11576a0904290907g48e94e74ye97aae593f6ac519@mail.gmail.com> <20090429131436.640f09ab@cuia.bos.redhat.com> Message-Id: <20090430093733.D20C.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Thu, 30 Apr 2009 09:39:38 +0900 (JST) Sender: owner-linux-mm@kvack.org To: Rik van Riel Cc: kosaki.motohiro@jp.fujitsu.com, Peter Zijlstra , Elladan , linux-kernel@vger.kernel.org, tytso@mit.edu, linux-mm@kvack.org List-ID: > When the file LRU lists are dominated by streaming IO pages, > evict those pages first, before considering evicting other > pages. > > This should be safe from deadlocks or performance problems > because only three things can happen to an inactive file page: > 1) referenced twice and promoted to the active list > 2) evicted by the pageout code > 3) under IO, after which it will get evicted or promoted > > The pages freed in this way can either be reused for streaming > IO, or allocated for something else. If the pages are used for > streaming IO, this pageout pattern continues. Otherwise, we will > fall back to the normal pageout pattern. > > Signed-off-by: Rik van Riel > > --- > On Thu, 30 Apr 2009 01:07:51 +0900 > KOSAKI Motohiro wrote: > > > we handle active_anon vs inactive_anon ratio by shrink_list(). > > Why do you insert this logic insert shrink_zone() ? > > Kosaki, this implementation mirrors the anon side of things precisely. > Does this look good? > > Elladan, this patch should work just like the second version. Please > let me know how it works for you. Looks good to me. thanks. but I don't hit Rik's explained issue, I hope Elladan report his test result. -- 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