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Date:      Thu, 21 Jul 2005 20:06:11 -0500
From:      Karl Denninger <karl@denninger.net>
To:        freebsd-stable@freebsd.org
Subject:   Re: Quality of FreeBSD
Message-ID:  <20050722010611.GA72234@FS.denninger.net>
In-Reply-To: <20050722013605.U16902@fledge.watson.org>
References:  <200507211803.j6LI34dV005050@ferens.net> <20050721194500.W9208@fledge.watson.org> <20050721192613.GA61902@FS.denninger.net> <6.2.1.2.0.20050721153750.0851fab0@64.7.153.2> <20050721202234.GA62615@FS.denninger.net> <20050722004340.H16902@fledge.watson.org> <20050722001253.GA70277@FS.denninger.net> <20050722013605.U16902@fledge.watson.org>

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On Fri, Jul 22, 2005 at 01:38:40AM +0100, Robert Watson wrote:
> 
> On Thu, 21 Jul 2005, Karl Denninger wrote:
> 
> >If Soren BELIEVES (2) is the case, I'll test against -BETA1, IF I can 
> >have confirmation that -BETA1 has the ATA-NG code in it.
> >
> >Its trivially easy for me to reproduce this problem on my sandbox 
> >machine.
> 
> As has already been stated, Soren's changes are in 6.x.  If you are able 
> to test this workload against 6.0-BETA1 using the hardware in question, 
> that would be very helpful.  Depending on the nature of the workload and 
> problem, you might find you need to compile out the debugging features, 
> as they slow things down quite a bit, so might reduce the transaction 
> rate sufficiently to make the problem fail to occur.  If it requires 5.x 
> applications, you might find you have to wait for BETA2.
> 
> Robert N M Watson

As I pointed out in my PR, "make -j4 buildworld" is more than sufficient
to demonstrate the problem.

This is why I don't understand why it has been ignored - it is easily
reproducable using stock Adaptec SATA controllers, standard SATA drives,
and a gmirror RAID 1 configuration.

This is pretty pedestrian stuff here Robert....  Two disks on one adapter,
on a PCI bus.....

I'll pull over 6.0-BETA1, rebuild the array (that is the time-consuming
part of this test - takes 6-8 hours for the rebuild to run) and see if it
fails during a buildworld.

--
-- 
Karl Denninger (karl@denninger.net) Internet Consultant & Kids Rights Activist
http://www.denninger.net	My home on the net - links to everything I do!
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