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Date:      Tue, 28 Jun 2005 23:22:24 -0700 (PDT)
From:      Doug White <dwhite@gumbysoft.com>
To:        Mitch Parks <mitch@kuoi.asui.uidaho.edu>
Cc:        freebsd-stable@freebsd.org, Robert Watson <rwatson@FreeBSD.org>, Kris Kennaway <kris@obsecurity.org>
Subject:   Re: 5.4-p1 crash
Message-ID:  <20050628232206.Q3088@carver.gumbysoft.com>
In-Reply-To: <20050625012751.U98651@kuoi.asui.uidaho.edu>
References:  <20050617150950.F1236@kuoi.asui.uidaho.edu> <20050617235352.GA80058@xor.obsecurity.org> <42B40173.6070600@crc.u-strasbg.fr> <20050619184650.T6413@fledge.watson.org> <20050625012751.U98651@kuoi.asui.uidaho.edu>

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On Sat, 25 Jun 2005, Mitch Parks wrote:

> On Sun, 19 Jun 2005, Robert Watson wrote:
>
> >> there is a PR for it : kern/74319
> >
> > This sounds very similar to a serial console related tty bug I was
> > experiencing on -STABLE a few months ago, and that is believed may have been
> > worked around in 5.4 tweaks before release.  In particular, that there are
> > reference counting related bugs in the 5.x tty code that are fixed by a
> > partial rewrite of the tty code in 6.x, but that are too large and disruptive
> > to merge to RELENG_5.  If the problem is persisting, it may be worth trying
> > to merge anyway, but it is a pretty big change and would break device driver
> > binary compatibility, etc.  What we might want to do here is wait until 6.x
> > has settled out a bit more, then consider merging it to 5.x once 6.x has
> > gotten burned in with similar workloads and continued to not illustrate the
> > 5.x tty reference bugs.
>
> On Fri, 24 Jun 2005, Doug White wrote:
>
> > I've run out of time to debug this, unfortunately...
>
> I went back to reports I made in January about 5.3:
> http://lists.freebsd.org/pipermail/freebsd-stable/2005-January/010898.html
> which appears to be the same issue. I _thought_ this was resolved when I
> disabled HT, but maybe I was just lucky between the last reboot and the 5.4
> upgrade.
>
> It sounds like there's a reasonable chance this has been squashed in code
> for 6.0? Since this box is already unstable, I'd be tempted to be an early 6
> adopter to see if it is actually resolved. Especially so if that would be
> helpful to the cause.

6.x is not affected by the tty-related problems that 5.x is having.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org



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