Re: nmi watchdog failure on dual Athlon box

[Joerg Sommrey]

On Tue, Sep 28, 2004 at 10:08:21PM +0100, Maciej W. Rozycki wrote:
> On Tue, 28 Sep 2004, Joerg Sommrey wrote:
> 
> > |--- lockupcli.c
> > |
> > |main ()
> > |{
> > |	iopl(3);
> > |	for (;;) asm("cli");
> > |}
> > 
> > Does this mean there is a good reason for further investigations on why
> > the IO-APIC NMI watchdog doesn't work? Until now I thought it would
> > be ok as long as the local APIC NMI watchdog is set up.
> 
>  Since this program does busy looping, the local APIC NMI watchdog should
> trigger indeed.  It's "cli; hlt" that causes a problem with this watchdog.  
> Something wrong is happening in your system, indeed.

As I stated earlier, there *seemed* to be a working IO-APIC NMI watchdog
with 2.6.3-mm4.  I never checked it's functionallity. Now I rebuilt that
kernel and gave it a try.  Though it claims to have a running IO-APIC NMI
watchdog, the lockupcli test failed.  Zwane was right when he suspected the
nmi_watchdog=1 test working erratically in that case.  Sad but true: no NMI
watchdog on tyan S2466.  I wonder if it's just impossible on such a board
or if it needs some "special treatment" 

-jo

-- 
-rw-r--r--  1 jo users 63 2004-09-29 22:10 /home/jo/.signature
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