Re: [PATCH v1 01/19] mm: use put_page to free page instead of putback_lru_page
From: Vlastimil Babka <hidden>
Date: 2016-03-15 19:06:21
On 15.3.2016 2:16, Minchan Kim wrote:
On Mon, Mar 14, 2016 at 09:48:33AM +0100, Vlastimil Babka wrote:quoted
On 03/11/2016 08:30 AM, Minchan Kim wrote: Yeah, and compaction (perhaps also other migration users) has to drain the lru pvec... Getting rid of this stuff is worth even by itself.Good note. Although we cannot remove lru pvec draining completely, at least, this patch removes a case which should drain pvec for returning freed page to buddy.
And this is in fact the only interesting case, right. The migrated page (at its new target) doesn't concern compaction that much, that can go to lru pvec just fine. But we do want the freed buddy pages to merge ASAP. I guess that's the same for CMA, page isolation...