Message-ID: <437E1E95.2010809@cybsft.com>
Date: Fri, 18 Nov 2005 12:33:57 -0600
From: "K.R. Foley" <kr@cybsft.com>
Organization: Cybersoft Solutions, Inc.
User-Agent: Thunderbird 1.5 (X11/20051025)
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To: Luca Falavigna <dktrkranz@gmail.com>
CC: Ingo Molnar <mingo@elte.hu>, Daniel Walker <dwalker@mvista.com>,
       john cooper <john.cooper@timesys.com>, linux-kernel@vger.kernel.org
Subject: Re: [BUG] Softlockup detected with linux-2.6.14-rt6
References: <4378B48E.6010006@gmail.com> <20051115153257.GA9727@elte.hu> <437A14FB.8050206@timesys.com> <20051115200010.GA13802@elte.hu> <Pine.LNX.4.64.0511151206000.29907@dhcp153.mvista.com> <437A7A58.8050209@gmail.com> <437DF0A8.6060409@gmail.com>
In-Reply-To: <437DF0A8.6060409@gmail.com>
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Luca Falavigna wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
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> 
> Luca Falavigna ha scritto:
> | Actually I am testing linux-2.6.14-rt13. If this problem come out again,
> | I will notify you ASAP.
> 
> Unfortunately this soft lockup bug affects version 2.6.14-rt13 too :(
> Stack traces are almost the same, except base addresses.
> 
> The bug was much harder to track down this time. Kernel detected a soft
> lockup bug after about three days of uptime.
> 
> I noticed another strange behaviour. When I rebooted the machine
> (actually pushing reset button, not CTRL+ALT+CANC or SysRq at all), it
> became *very* slow. GRUB took up to five seconds to be fully loaded
> (usualy it takes only a fraction of second) and the initial phase of
> booting the kernel was about 4 times slower. Even after a power off this
> behaviour was still present! Need more coffee?

The slow booting sounds a lot like the RCU_TORTURE_TEST slowing things 
down. You might try turning off RCU_TORTURE_TEST or setting it to be a 
module.

> 
> Regards,
> - --
>                     Luca
> 
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-- 
    kr
-
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