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

[Nathan Zimmer]

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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/