Re: [RFC 2/2] x86_64, mm: Reinsert the absent memory

[Dave Hansen]

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. :)
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