Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751530AbWEUMBf (ORCPT ); Sun, 21 May 2006 08:01:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751531AbWEUMBf (ORCPT ); Sun, 21 May 2006 08:01:35 -0400 Received: from smtp109.mail.mud.yahoo.com ([209.191.85.219]:44367 "HELO smtp109.mail.mud.yahoo.com") by vger.kernel.org with SMTP id S1751527AbWEUMBe (ORCPT ); Sun, 21 May 2006 08:01:34 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:Message-ID:Date:From:User-Agent:X-Accept-Language:MIME-Version:To:CC:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=vIMGkygD7Z/UjizVtmduXWjjZW8Ho2cjkJYAu0FeN6bAqwDFDUxhJbZiz4LCIyoDyKF3G1HWjsevbyYkDIH6AmVdmm5OEeLjuqAGw9YpxtqPno/i31LY67LTX69mRz/Ui66IsIBuREAYXwqjvDrzTVN7qZgQdzrnM/5aAiuxnFc= ; Message-ID: <44705699.3080401@yahoo.com.au> Date: Sun, 21 May 2006 22:01:29 +1000 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20051007 Debian/1.7.12-1 X-Accept-Language: en MIME-Version: 1.0 To: Chris Wedgwood CC: Haar J?nos , linux-kernel@vger.kernel.org Subject: Re: swapper: page allocation failure. References: <00e901c67cad$fe9a9d90$1800a8c0@dcccs> <20060521081621.GA1151@taniwha.stupidest.org> <010801c67cb1$bc13fd00$1800a8c0@dcccs> <20060521084728.GA2535@taniwha.stupidest.org> <012201c67cb5$7a213800$1800a8c0@dcccs> <20060521091022.GA3468@taniwha.stupidest.org> <014601c67cb9$4f235f30$1800a8c0@dcccs> <20060521102642.GB5582@taniwha.stupidest.org> In-Reply-To: <20060521102642.GB5582@taniwha.stupidest.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1418 Lines: 40 Chris Wedgwood wrote: > On Sun, May 21, 2006 at 11:31:12AM +0200, Haar J?nos wrote: > > >>[root@st-0001 /]# uname -a >>Linux st-0001 2.6.17-rc3-git1 #2 SMP Sun May 21 01:12:22 CEST 2006 i686 i686 i386 GNU/Linux > > > did earlier kernels work OK? > > >>This is a simple disk node. >>It serves the md0 array, and uses mem for buffering-caching. > > > odd, i looks like you've leaked alot of lowmem but i can't think why > > i've got major (induced) brain-fog right now so i'll have to think > about it tomorrow sorry The buffers are buffercache rather than the usual pagecache; due to nbd I guess. Buffercache cannot be satisfied by highmem. This would be a relatively uncommon setup, which explains why it isn't working 100%. I don't know of any reason why reclaim speed should be worse for buffercache, however one notable thing will be that zone_normal's lowmem reserve that is untouchable by pagecache will be eaten by buffercache... Anyway, increasing /proc/sys/vm/min_free_kbytes should help. Janos, perhaps you could try doubling it and see how you go? -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com - 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/