Re: [RFC 11/13] mm, compaction: add the ultimate direct compaction priority

Michal Hocko
2016-05-16T08:11:30Z

On Mon 16-05-16 09:17:11, Vlastimil Babka wrote:
> On 05/13/2016 03:38 PM, Michal Hocko wrote:
> > On Tue 10-05-16 09:36:01, Vlastimil Babka wrote:
[...]
> > > such as hugetlbfs allocations, and reduce some corner-case OOM's for non-costly
> > > allocations.
> >
> > My testing has shown that even with the current implementation with
> > deferring, skip hints and cached positions had (close to) 100% success
> > rate even with close to OOM conditions.
>
> Hmm, I thought you at one point said that ignoring skip hints was a large
> improvement, because the current resetting of them is just too fuzzy.

Not in the hugetlb test. But you are right that skip hints resulted in
really fuzzy behavior.
--
Michal Hocko
SUSE Labs