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Date:      Tue, 29 Jun 2004 12:18:05 -0400
From:      Brian Fundakowski Feldman <green@freebsd.org>
To:        Christoph Sold <Christoph.Sold@bahn.de>
Cc:        freebsd-current@freebsd.org
Subject:   Re: 5.2.1-Current freeze caused by copying audio CD-ROM
Message-ID:  <20040629161805.GB1144@green.homeunix.org>
In-Reply-To: <loom.20040629T162351-273@post.gmane.org>
References:  <loom.20040629T162351-273@post.gmane.org>

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On Tue, Jun 29, 2004 at 02:29:05PM +0000, Christoph Sold wrote:
> Hi Folks,
> 
> I can repeatably freeze my Current box using a few problematic CDs. All it takes
> is to read the CD using dd, cdparanoia et. al.
> 
> A few seconds before the freez occurs the system slows down, I/O goes way up for
> a few seconds. After that, the system does not respond. To any keyboard, net, or
> serial activity. I've waited a few nights to check the system does not react.
> 
> Any ideas how to debug this problem?

Nothing much to report except that it happens for me, too, whether it's
with the regular acd(4) device or the ATAPI-CAM cd(4) device.  It seems
like it's a not a hardware issue.  The process in the ata/acd/atapicam
drivers dealing with detachment might be particularly messy.  These
lock-ups in general are almost as annoying as the ones that various
people (myself included) are having from during the boot process.  If
you have a serial console, it would be worth seeing if it can respond
that way.

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green@FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\



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