Re: 2.6.13-rc3-mm3

[Christoph Lameter]

On Mon, 1 Aug 2005, Richard Purdie wrote:

> > IP Not changing? Could it be in a loop doing faults for the same memory 
> > location that you cannot observe with gdb? Or is there some hardware fault 
> > that has stopped the processor?
> 
> I'm not the worlds most experienced user of gdb but I can't see any
> evidence of a hardware fault and the processor shows all indications of
> running. It seems likely to be looping with memory faults or otherwise
> jammed somehow.

Can you run kgdb on it to figure out what is going on?

> Is there anything I can use in /proc to monitor page faults or anything
> I can do with gdb to help narrow this down?

Run kgdb and see what is going on in the fault handler.

There are some variables in /proc/vmstat that may help:

spurious_page_faults 0
cmpxchg_fail_flag_update 0
cmpxchg_fail_flag_reuse 0
cmpxchg_fail_anon_read 0
cmpxchg_fail_anon_write 0

etc.


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