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Date:      Wed, 22 Sep 2004 13:13:30 +0200
From:      Eirik Oeverby <ltning@anduin.net>
To:        Markie <mark.cullen@dsl.pipex.com>
Cc:        Stefan Ehmann <shoesoft@gmx.net>
Subject:   Re: 6.0-CURRENT very unstable with PREEMPTION
Message-ID:  <41515E5A.4040205@anduin.net>
In-Reply-To: <03a201c4a07f$c4523870$f800000a@laptop>
References:  <1095156706.779.17.camel@taxman> <1095794597.1536.4.camel@taxman> <03a201c4a07f$c4523870$f800000a@laptop>

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Markie wrote:
> ----- Original Message -----
> From: "Stefan Ehmann" <shoesoft@gmx.net>
> To: <current@freebsd.org>
> Sent: Tuesday, September 21, 2004 8:23 PM
> Subject: Re: 6.0-CURRENT very unstable with PREEMPTION
> 
> 
> | On Tue, 2004-09-14 at 12:11, Stefan Ehmann wrote:
> | > Since it's default now, I turned PREEMPTION (with SCHED_4BSD) on again
> | > in my KERNCONF on my 6.0-CURRENT i386 pc.
> | >
> | > After about 10-15 minutes some windows stop beeing redrawn... new terms
> | > can be started very slowly for a short period of time. Then everything
> | > completely freezes.
> | >
> | > Unfortunately I can't provide much more information. So far I've only
> | > been able to reproduce this in X. Getting coredumps has not been
> working
> | > for months now and I don't have a serial console setup.
> | >
> | > Without PREEMPTION everything works very stable.
> |
> | Tried today again with fresh world/kernel and was able to reproduce the
> | hang in the console. The only thing working after a while was switching
> | consoles. No panic or any other messages though.
> |
> 
> I had that problem the other day, with a -CURRENT before all the PREEMPTION
> stuff was put in :-) around 1st of June kernel I think.

I've seen this behaviour too, on amd64 pre-PREEMPTION. Late may/early 
june checkout. The box could be stable for days or weeks but then 
suddenly hang like that.

/Eirik

> 
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