Re: [PATCH] util: NUMA aware memory preallocation

[David Hildenbrand]

>>
>> The very last cases is the only one where this patch can potentially
>> be beneficial. The problem is that because libvirt is in charge of
>> enforcing CPU affinity, IIRC, we explicitly block QEMU from doing
>> anything with CPU affinity. So AFAICT, this patch should result in
>> an error from sched_setaffinity when run under libvirt.
> 
> Yes, I had to disable capability dropping in qemu.conf.
> 
> After all, I think maybe the right place to fix this is kernel? I mean,
> why don't prealloc threads converge to the nodes they are working with?

Good question, I think the whole machinery doesn't support hugetlb,
including recording remote faults and migrating the thread to a
different node.

-- 
Thanks,

David / dhildenb