Re: [PATCH] mm, oom: allow oom reaper to race with exit_mmap

[Michal Hocko]

On Tue 25-07-17 18:07:19, Kirill A. Shutemov wrote:
> On Tue, Jul 25, 2017 at 04:26:17PM +0200, Michal Hocko wrote:
[...]
> > Thanks for retesting Kirill. Are those numbers stable over runs? E.g.
> > the run without the patch has ~3% variance while the one with the patch
> > has it smaller. This sounds suspicious to me. There shouldn't be any
> > lock contention (except for the oom killer) so the lock shouldn't make
> > any difference wrt. variability.
> 
> There's run-to-tun variability. I'll post new numbers for your new test.

That's what I've seen and the variance was quite large. I suspected
shell but if you look at the more dedicated test, the std over avg is
still quite large.
-- 
Michal Hocko
SUSE Labs