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Date:      Thu, 14 Jul 2005 23:10:42 +0400
From:      Gleb Smirnoff <glebius@FreeBSD.org>
To:        Peter Holm <peter@holm.cc>
Cc:        maxim@FreeBSD.org, sam@FreeBSD.org, current@FreeBSD.org
Subject:   Re: http://www.holm.cc/stress/log/cons141.html
Message-ID:  <20050714191042.GA21991@cell.sick.ru>
In-Reply-To: <20050714183932.GA46344@peter.osted.lan>
References:  <20050713083756.GA3728@cell.sick.ru> <20328.193.162.192.11.1121244715.squirrel@webmail2.pair.com> <20050714111043.GA17494@cell.sick.ru> <20050714183932.GA46344@peter.osted.lan>

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On Thu, Jul 14, 2005 at 08:39:32PM +0200, Peter Holm wrote:
P> > On Wed, Jul 13, 2005 at 10:51:55AM +0200, Peter Holm wrote:
P> > P> > how often the panic in subject fires? I guess it is related to the problem
P> > P> > discussed in this thread [1], and may be even the patch I've posted there
P> > P> > will help.
P> > P> >
P> > P> 
P> > P> The panic is almost instantanious if I run the stress test while doing
P> > P> an "arp -d xxx".
P> > 
P> > The attached WIP patch helps me. The [1] script can't drop my box to panic
P> > anymore, when running in 15 instances on 4-x CPU box.
P> 
P> Yes, works for me! I've been testing for three hours without any
P> problems and then ran into another unrelated livelock.

Were you running it with WITNESS or without? How many CPUs does your box have?
I've got a hard panic without access to ddb when running without WITNESS.
I think WITNESS slowness can hide some races. I'll continue to work on this
tomorrow.

-- 
Totus tuus, Glebius.
GLEBIUS-RIPN GLEB-RIPE



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