Re: [PATCH V2] mm: compaction: skip memory compaction when there are not enough migratable pages

[David Hildenbrand]

> > +	/*
> > +	 * Gup-pinned pages are non-migratable. After subtracting these pages,
> > +	 * we need to check if the remaining pages are sufficient for memory
> > +	 * compaction.
> > +	 */
> > +	if ((sum - nr_pinned) < (1 << order))
> > +		return false;
> > +
>
> Looks reasonable to me, but let's see if other people have any comments.

Noting that Barry had some concerns as reply to v3.

--
Cheers,

David / dhildenb