Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267648AbUJHD2y (ORCPT ); Thu, 7 Oct 2004 23:28:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267487AbUJHDZd (ORCPT ); Thu, 7 Oct 2004 23:25:33 -0400 Received: from mail-13.iinet.net.au ([203.59.3.45]:41119 "HELO mail.iinet.net.au") by vger.kernel.org with SMTP id S266116AbUJHDNn (ORCPT ); Thu, 7 Oct 2004 23:13:43 -0400 Message-ID: <416605CC.2080204@cyberone.com.au> Date: Fri, 08 Oct 2004 13:13:16 +1000 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.2) Gecko/20040820 Debian/1.7.2-4 X-Accept-Language: en MIME-Version: 1.0 To: Andrew Morton CC: chrisw@osdl.org, nickpiggin@yahoo.com.au, linux-kernel@vger.kernel.org, Dave Jones Subject: Re: kswapd in tight loop 2.6.9-rc3-bk-recent References: <20041007142019.D2441@build.pdx.osdl.net> <20041007164044.23bac609.akpm@osdl.org> <4165E0A7.7080305@yahoo.com.au> <20041007174242.3dd6facd.akpm@osdl.org> <20041007184134.S2357@build.pdx.osdl.net> <20041007185131.T2357@build.pdx.osdl.net> <20041007185352.60e07b2f.akpm@osdl.org> <4165FF7B.1070302@cyberone.com.au> <20041007200109.57ce24ae.akpm@osdl.org> In-Reply-To: <20041007200109.57ce24ae.akpm@osdl.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: 1919 Lines: 59 Andrew Morton wrote: >Nick Piggin wrote: > >>>Chris Wright wrote: >>> >> > >> >>(whereas I could get the mainline code, and the >> >> one-liner to spin right off). >> >> >> > >> >How? (up to and including .config please). >> > >> > >> > >> >> Ah, free_pages <= pages_high, ie. 0 <= 0, which is true; >> commence spinning. >> > >Maybe. It requires that the zonelists be screwy: > > Node 1 DMA free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB > protections[]: 0 0 0 > Node 1 Normal free:25272kB min:1020kB low:2040kB high:3060kB active:624172kB inactive:282700kB present:1047936kB > protections[]: 0 0 0 > Node 1 HighMem free:0kB min:128kB low:256kB high:384kB active:0kB inactive:0kB present:0kB > protections[]: 0 0 0 > Node 0 DMA free:728kB min:12kB low:24kB high:36kB active:788kB inactive:7848kB present:16384kB > protections[]: 0 0 0 > Node 0 Normal free:27200kB min:1004kB low:2008kB high:3012kB active:332792kB inactive:422744kB present:1032188kB > protections[]: 0 0 0 > Node 0 HighMem free:0kB min:128kB low:256kB high:384kB active:0kB inactive:0kB present:0kB > protections[]: 0 0 0 > >See that DMA zone on node 1? Wonder how it got like that. It >should not be inside pgdat->nrzones anyway. > > Oh? Why not? I didn't think empty zones were filtered out? (perhaps they should be). >David, is your setup NUMA? Can you show us a sysrq-M dump? > > Yes. Incase he's alseep, I'll quote: "I saw the same thing yesterday, also on an amd64 box though that could be coincidence. The kswapd1 process was pegging the cpu at 99% kswapd0 was idle. After a few minutes, the box became so unresponsive" - 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/