Re: v2.6.26-rc7: BUG: unable to handle kernel NULL pointer dereference

[Mike Travis]

Rusty Russell wrote:
...
> Nice catch.  Basically, cpu_possible_map should only be cleared at boot, and 
> probably not even then.
> 

One thing that should be avoided, is clearing anything but the last bit in the
cpu_possible_map.  This is because num_possible_cpus != nr_cpu_ids when there
are holes in the map.  (nr_cpu_ids = highest possible cpu # + 1).

Thanks,
Mike
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