kern/52648: bonnie gives kernel panic in SMP but not in UNI on FBSD 5.0

[Stefan A. Deutscher]

The following reply was made to PR kern/52648; it has been noted by GNATS.

From: "Stefan A. Deutscher" <stefand at attglobal.net>
To: FreeBSD-gnats-submit at freebsd.org
Cc:  
Subject: Re: kern/52648: bonnie gives kernel panic in SMP but not in UNI on FBSD 5.0
Date: Tue, 10 Jun 2003 21:58:33 +0000

 Hi,
 
   here's a follow-up, thanks to Andy Farkas who advised me to try the
 SMP kernel on the box with the L2 cache disabled.
 
 This does circumvent the stability problem, the machine survies numerous
 kernel builds, bonnie(s) over the ocean and back, as well as anything X.
 
 But, it's slow as a molasse now. To be precise, at least twice as slow
 as it was anyway already with L2 cache. So now, with the SMP option
 enabled I am back to where I was with L2 cache and UNI.
 
 I am still hoping that this is not a hardware problem which cannot
 be fixed (after all, it works just fine and dandy in UNI). Is there
 anything I can do/debug to make a solution more likely? Or, would some
 kind SMP soul please speak up to point out that undocumented
 kernel option
 
  option fix_intergraph_TD4_SMP_L2_problem
 
 for rouge SMP hardware?
 
 
 Seriously, I went through LINT, but the only thing I found regarding L2
 seems to be enabled only on some non-Intel CPUs.
 
 
 Any pointers are most welcome!
 
   Thanks & Cheers, Stefan
 
 
 On Sat, May 24, 2003 at 09:50:12AM -0700, FreeBSD-gnats-submit at freebsd.org wrote:
 > Thank you very much for your problem report.
 > It has the internal identification `kern/52648'.
 > The individual assigned to look at your
 > report is: freebsd-bugs. 
 > 
 > You can access the state of your problem report at any time
 > via this link:
 > 
 > http://www.freebsd.org/cgi/query-pr.cgi?pr=52648
 > 
 > >Category:       kern
 > >Responsible:    freebsd-bugs
 > >Synopsis:       bonnie gives kernel panic in SMP but not in UNI on FBSD 5.0
 > >Arrival-Date:   Sat May 24 09:50:12 PDT 2003
 > 
 
 -- 
 ============================================================================
 Stefan A. Deutscher                             |
 Donostia International Physics Center           | office: ++34-943-018174
 Universidad del Pais Vasco, Facultad de Quimica | fax   : ++34-943-015600
 Departamento de Fisica de Materiales            | home  : ++34-943-270647
 Apartado 1072, San Sebastian 20080, Spain       | email : sad at utk.edu
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