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SubjectRe: [RFC 2/2] x86_64, mm: Reinsert the absent memory
On 06/26/2013 10:12 AM, Dave Hansen wrote:
> On 06/26/2013 07:49 AM, Nathan Zimmer wrote:
>> My guess it is the NMIs overwhelming the system but I have not found a good way
>> to profile perf gone wild so it is only a guess.
> I've got an 80-core system and the symptoms sound similar to perf issues
> I'm seeing. Dropping the sample rate helped for me, and there's a patch
> in -tip at the moment to do it automatically:
>
>> http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=14c63f17b1fde5a575a28e96547a22b451c71fb5
> Looks like you've also found that debugging NMIs is fun. :)
More fun then one person can handle.
I'll have to take this patch for a spin.

Thanks,
Nate


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