Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932489AbYBUMl2 (ORCPT ); Thu, 21 Feb 2008 07:41:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758067AbYBUMlT (ORCPT ); Thu, 21 Feb 2008 07:41:19 -0500 Received: from py-out-1112.google.com ([64.233.166.178]:2795 "EHLO py-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758172AbYBUMlS (ORCPT ); Thu, 21 Feb 2008 07:41:18 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=OE/4YrYyHgVYyhP4y2J4qDQXcV07PzLJ1ycAbrJVd9yGQ/cf3dMfnx2kMCNfW9XXdqt35wN6OuPSPAsPRvN00s4kqo/f8AzsA7Nf9EcCND7KQUbJmddZlzt0OhFQzlXT3/30DBMVQ+5tv7y1hdWuSsuGu5bziLZ7vR9VvOuJfAw= Message-ID: <2f11576a0802210441n5912ddcfne45138c52e77c159@mail.gmail.com> Date: Thu, 21 Feb 2008 21:41:15 +0900 From: "KOSAKI Motohiro" To: "minchan Kim" Subject: Re: [RFC][PATCH] the proposal of improve page reclaim by throttle Cc: "KAMEZAWA Hiroyuki" , "Balbir Singh" , "Rik van Riel" , "Lee Schermerhorn" , linux-mm@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: <44c63dc40802210429y24757a34p2cc8093a2db6181a@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080220181447.6444.KOSAKI.MOTOHIRO@jp.fujitsu.com> <44c63dc40802200149r6b03d970g2fbde74b85ad5443@mail.gmail.com> <20080220185648.6447.KOSAKI.MOTOHIRO@jp.fujitsu.com> <44c63dc40802210138s100e921ekde01b30bae13beb1@mail.gmail.com> <2f11576a0802210255k1e3acad7n87814e916fd24509@mail.gmail.com> <44c63dc40802210429y24757a34p2cc8093a2db6181a@mail.gmail.com> X-Google-Sender-Auth: a2935adf2880c512 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1010 Lines: 22 > > please repost question with change subject. > > i don't know reason of vanilla kernel behavior, sorry. > > Normally, embedded linux have only one zone(DMA). > > If your patch isn't applied, several processes can reclaim memory in parallel. > then, DMA zone's pages_scanned is suddenly increased largely. Because > embedded linux have no swap device, kernel can't stop to scan lru > list until meeting page cache page. so if zone->pages_scanned is > greater six time than lru list pages, kernel make the zone with > unreclaimable state, As a result, OOM will kill it, too. sorry, my last mail is easy confusious. if you want discuss vanilla kernel bug, you shold post mail by another thread. if not, your mail is only readed by few people. Thanks. -- 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/