Date: Mon, 16 Feb 2004 07:18:22 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: Kris Kennaway <kris@obsecurity.org> Cc: current@freebsd.org Subject: Re: Scheduling deadlock on alpha? Message-ID: <20040216061821.GZ44313@cicely12.cicely.de> In-Reply-To: <20040216055840.GA72555@xor.obsecurity.org> References: <20040216055840.GA72555@xor.obsecurity.org>
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On Sun, Feb 15, 2004 at 09:58:40PM -0800, Kris Kennaway wrote: > One of the alpha package machines seems to have deadlocked; no > processes are running, but the kernel itself responds to pings, and I > can break to DDB: How long have you waited? It seems that the system was busy waiting for page faults and swap. I've seen conditions lately where this can block the system for a very long time in case there is not enough memory free. The number of processes point to memory stress. I asume you had no chance to take a lock at the disk lights? Havn't looked any deeper into that issue yet because my system uses md based swap in a file and I wanted to recheck with conventional swap partition first. > FreeBSD axp1.FreeBSD.org 5.2-CURRENT FreeBSD 5.2-CURRENT #0: Wed Jan 21 13:30:26 PST 2004 kris@bento.FreeBSD.org:/local0/obj/alpha/a/asami/portbuild/alpha/src-client/sys/NETBOOT alpha > > Scheduler is 4BSD. My system is from 25th jan but is running ULE. Don't remember the version I was running bevor but it did not show this behavour. -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de
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