Messages in this thread | | | Date | Wed, 10 Feb 2021 15:27:45 +0100 | From | Oscar Salvador <> | Subject | Re: [PATCH] mm: remove lru_add_drain_all in alloc_contig_range |
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On Wed, Feb 10, 2021 at 01:17:33PM +0100, Vlastimil Babka wrote: > AFAICS, at the time page migration used putback_lru_page() to release the > migration source page. This would put the page on lru pvec even if it was in > fact not mapped anywhere anymore, and only the drain would actually free it. > Seems Minchan optimized this in 2016 by c6c919eb90e0 ("mm: use put_page() to > free page instead of putback_lru_page()")
Ok, I see. Thanks for this valuable information Vlastimil.
-- Oscar Salvador SUSE L3
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