Date: Tue, 6 Jul 2004 16:14:27 +0400 From: Gleb Smirnoff <glebius@cell.sick.ru> To: "Michael L. Hostbaek" <mich@FreeBSD.org>, Robert Watson <rwatson@FreeBSD.org>, Thorsten Greiner <thorsten@tgreiner.net>, Bosko Milekic <bmilekic@FreeBSD.org>, current@FreeBSD.org Subject: Re: Native preemption is the culprit [was Re: today's CURRENT lockups] Message-ID: <20040706121427.GA66881@cell.sick.ru> In-Reply-To: <20040706121247.GC38662@mich2.itxmarket.com> References: <20040705184940.GA2651@tybalt.greiner.local> <Pine.NEB.3.96L.1040706001249.2853I-100000@fledge.watson.org> <20040706121247.GC38662@mich2.itxmarket.com>
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On Tue, Jul 06, 2004 at 02:12:47PM +0200, Michael L. Hostbaek wrote: M> > The patch below appears to (brute force) eliminate the crash/hang I'm M> > experiencing with SCHED_ULE in the post-preemption universe. However, I M> > was experiencing it only in the SMP case, not UP, so it could be I'm just M> > not triggering it timing-wise. This would be a temporary fix until jhb is M> > online again post-USENIX to take a look, assuming this works around the M> > problem for people other than me. M> M> I've been using this patch on my UP machine for 5-6 hours now, without M> any hangs/crashes. I have just removed #define PREEMPTION in param/machine.h and rebuilt kernel. No problems during working day. -- Totus tuus, Glebius. GLEBIUS-RIPN GLEB-RIPE
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