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Date:      Fri, 15 Jul 2005 11:40:27 +0200
From:      Marc Olzheim <marcolz@stack.nl>
To:        Kris Kennaway <kris@obsecurity.org>
Cc:        Marc Olzheim <marcolz@stack.nl>, freebsd-stable@freebsd.org
Subject:   Re: Today's RELENG_5_4 and 'lock cmpxchgl'
Message-ID:  <20050715094027.GA35516@stack.nl>
In-Reply-To: <20050714174403.GC19081@xor.obsecurity.org>
References:  <20050701130335.GA2040@stack.nl> <20050701182946.GA99767@xor.obsecurity.org> <42C7A422.30709@crc.u-strasbg.fr> <20050711143216.GA25523@stack.nl> <20050713092939.GA65261@stack.nl> <20050713120030.GB23629@xor.obsecurity.org> <20050713125522.GA62977@stack.nl> <20050713184118.GD42067@xor.obsecurity.org> <20050714130520.GB26456@stack.nl> <20050714174403.GC19081@xor.obsecurity.org>

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On Thu, Jul 14, 2005 at 01:44:04PM -0400, Kris Kennaway wrote:
> > The -CURRENT traces are very different from these, but I don't have
> > comconsole on the -CURRENT machine.
>=20
> Thanks.

Since I get plenty of opportunities to fiddle in the debugger now,
because this happens a lot (we use screen a lot), tell me if anyone
needs any specific info from the debugger prompt.

Am I really the only one seeing this ? Or has someone been able to
reproduce it yet ?

> > Anyway, if people are having problems reproducing this, I'd like to
> > know. I don't have a single RELENG_5 or 6 machine that withstands the
> > 'screen-test'...
>=20
> This will hopefully be very useful in investigating and developing a
> fix for the problem, at least on 6.0 (others have speculated that the
> problem may be too difficult to fix in the 5.x branch).

That sounds too scary to go into. Besides: it has worked on older
FreeBSD 5.x systems...

Perhaps 'others' could 'speculate' on list, so we might know why
they're thinking that ? :-P

Should SMP machines revert to FreeBSD 4.x in the mean time ? :-(

Marc

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