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Date:      Tue, 17 Aug 2004 13:25:21 +0200 (CEST)
From:      Martin Blapp <mb@imp.ch>
To:        Jon Noack <noackjr@alumni.rice.edu>
Cc:        Julian Elischer <julian@elischer.org>
Subject:   Re: Deadlocks with recent SMP current
Message-ID:  <20040817132426.U4594@cvs.imp.ch>
In-Reply-To: <4121944C.5060802@alumni.rice.edu>
References:  <20040813121208.M31181@cvs.imp.ch> <20040813102922.E93695@carver.gumbysoft.com> <411D20DF.2000503@samsco.org> <411E9399.3050200@alumni.rice.edu> <411EF85A.30006@elischer.org> <4121944C.5060802@alumni.rice.edu>

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Hi,

> > +        if ((ctd->td_kse == NULL) || (ctd->td_kse->ke_thread != ctd))
> > +               return (0);
> With the previous patch I still had difficulties getting through a
> buildworld in multi-user (while running apache, postfix+amavisd-new,
> nfs, etc.).  With this patch I have not run into any issues (make -j4
> buildworlds are stable on my dual p3 even after uncommenting
> -DUSE_KQUEUE and rebuilding make).  If the last patch was a bandaid,
> this is one of those new-fangled "sport" bandaids that are water- and
> sweat-resistent... ;-)

Have you PREEMPTION or FULL_PREEMTION defined ? Else I can't see how
this patch would be effective.

Martin



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