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

Mike Travis
2008-06-24T14:44:57Z

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