From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from digeo-nav01.digeo.com (digeo-nav01.digeo.com [192.168.1.233]) by packet.digeo.com (8.9.3+Sun/8.9.3) with SMTP id NAA04843 for ; Wed, 9 Oct 2002 13:17:47 -0700 (PDT) Message-ID: <3DA48EEA.8100302C@digeo.com> Date: Wed, 09 Oct 2002 13:17:46 -0700 From: Andrew Morton MIME-Version: 1.0 Subject: Re: Hangs in 2.5.41-mm1 References: <1034188573.30975.40.camel@plars> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Paul Larson Cc: linux-mm List-ID: Paul Larson wrote: > > I'm able to generate a lot of hangs with 2.5.41-mm1. > This is on a 8-way PIII-700, 16 GB ram (PAE enabled) > > The first one, I got by running ltp for a while, then the attached test > for a bit, then, at the suggestion of Bill Irwin to increase the amount > of ram I could be using for huge pages: > echo 768 > /proc/sys/vm/nr_hugepages Paul, this is not very clear to me, sorry. You don't state at which point it hung. Could you please carefully spell out the precise sequence of steps which led to the hang? > Doing that (and the corresponding echo 1610612736 > > /proc/sys/kernel/shmmax) after a cold boot gave me no problems though. > > I also got it to hang after runnging the attached test with -s > 1610612736 and then running another one with no options. With what settings in /proc, etc? > There was no output on the serial console when it hung, and it was > unresponsive to ping, vc switch, and sysrq. > > The attached test is an ltp shmem test modified by Bill Irwin to support > the shm huge pages in 2.5.41-mm1. Compile it with --static. OK, great. I'll try to reproduce this but I would appreciate some help in understanding what I need to do. Usually it just ends up with "it works for me" :( There is a locks-up-for-ages bug in refill_inactive_zone() - could be that. Dunno. -- 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/