Date: Thu, 14 Jul 2005 21:45:08 +0200 From: Peter Holm <peter@holm.cc> To: Gleb Smirnoff <glebius@freebsd.org> Cc: maxim@freebsd.org, sam@freebsd.org, current@freebsd.org Subject: Re: http://www.holm.cc/stress/log/cons141.html Message-ID: <20050714194508.GA48176@peter.osted.lan> In-Reply-To: <20050714191042.GA21991@cell.sick.ru> 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> <20050714191042.GA21991@cell.sick.ru>
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On Thu, Jul 14, 2005 at 11:10:42PM +0400, Gleb Smirnoff wrote: > 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. > Single CPU + WITNESS: $ diff GENERIC PHO 68a69 > options BREAK_TO_DEBUGGER 295a297,303 > > options DEBUG_LOCKS > options DEBUG_VFS_LOCKS > options KTR > options KTR_ENTRIES=4096 > options KTR_MASK=(KTR_BUF|KTR_VFS) > options KTR_COMPILE=(KTR_BUF|KTR_VFS) - Peter > -- > Totus tuus, Glebius. > GLEBIUS-RIPN GLEB-RIPE
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