[linux-dvb] Re: SkyStar2 Rev. 2.6C & hyperthreading

[Johannes Stezenbach <js@convergence.de>]

On Sat, May 01, 2004 at 10:49:13PM +0200, Reinhard Nissl wrote:
> 
> it seems, that current (CVS) dvb-kernel (2.6/2.4) drivers work properly 
> over several hours, if hyperthreading is disabled (SMP kernel reports a 
> single CPU).
> 
> But with hyperthreading enabled, it happens quickly, that my system 
> freezes. The tests I've done so far showed, that it is necessary to have 
> the card provide a stream. Just loading the drivers but not accessing the 
> dev files will not lead to a freeze (usually I use this card with VDR).
> 
> How can I assist in fixing this issue?

I don't know much about the SkyStar2 drver, but generally you first try
if SysRq still work. If yes, SysRq-T might give you some hint where
the driver hangs (for 2.4 you will have to pipe the output through
ksymoops to make it readable). SysRq-S might help to get the output
into your log files.

You could also try the NMI-oopser to debug the lockups. Try to
append nmi_watchdog=2 (2 should work for P4, or try 1) to your
kernel command line. See linux/Documentation/nmi_watchdog.txt.

HTH,
Johannes


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