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List:       linux-smp
Subject:    RE: Linux 2.4.0 SMP hang on an IBM Netfinity 5100
From:       "Paskal DRAPIER" <pdrapier () audientia ! com>
Date:       2001-02-07 17:31:35
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Hi !
I'll be interested in these infos, I've got the same problem on the IBM
Netfinity 4500R  !!!

Paskal

-----Message d'origine-----
De : linux-smp-owner@vger.kernel.org
[mailto:linux-smp-owner@vger.kernel.org]De la part de Prasenjit Sarkar
Envoye : Wednesday, February 07, 2001 6:26 PM
A : Maciej W. Rozycki
Cc : Andrew Morton; linux-smp@vger.kernel.org
Objet : Re: Linux 2.4.0 SMP hang on an IBM Netfinity 5100




Thanks for the info, I'll ask the Netfinity folks for some documentation.

--prasenjit


   Prasenjit Sarkar
   Research Staff Member
   IBM Almaden Research
   San Jose


"Maciej W. Rozycki" <macro@ds2.pg.gda.pl> on 02/07/2001 08:54:20 AM

To:   Prasenjit Sarkar/Almaden/IBM@IBMUS
cc:   Andrew Morton <andrewm@uow.edu.au>, linux-smp@vger.kernel.org
Subject:  Re: Linux 2.4.0 SMP hang on an IBM Netfinity 5100



On Tue, 6 Feb 2001, Prasenjit Sarkar wrote:

> Here is the current status wrt Linux 2.4.0 SMP on an IBM Netfinitiy 5100
>
> nmi_watchdog=1          complete system lock, no response to alt-sysrq,
no
> I/O of any sort
>                       system lock always happens when the machine is idle
>                mttf = 2 hours
>
> nmi_watchdog =0          stable

 There appears to be some kind of management hardware in certain IBM PCs,
which interacts badly with the NMI watchdog.  Since NMIs are not visible
outside CPUs, the only reason of this behaviour may be System Control Port
B (at 0x61) accesses which are performed by our NMI handler to determine
the reason of a NMI.  With neither documentation nor hardware that's about
all that can be deduced.

--
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@ds2.pg.gda.pl, PGP key available        +




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