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Date: Mon, 2 May 2022 10:53:21 +0100 From: Mel Gorman <mgorman@...e.de> To: Wonhyuk Yang <vvghjk1234@...il.com> Cc: Andrew Morton <akpm@...ux-foundation.org>, Ohhoon Kwon <ohkwon1043@...il.com>, JaeSang Yoo <jsyoo5b@...il.com>, Jiyoup Kim <lakroforce@...il.com>, Donghyeok Kim <dthex5d@...il.com>, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] mm/page_alloc: cache the result of node_dirty_ok() On Sat, Apr 30, 2022 at 10:10:32AM +0900, Wonhyuk Yang wrote: > To spread dirty page, nodes are checked whether > it reached the dirty limit using the expensive > node_dirty_ok(). To reduce the number of calling > node_dirty_ok(), last node that hit the dirty > limit is cached. > > Instead of caching the node, caching both node > and it's result of node_dirty_ok() can reduce > the number of calling node_dirty_ok() more than > before. > > Signed-off-by: Wonhyuk Yang <vvghjk1234@...il.com> Acked-by: Mel Gorman <mgorman@...e.de> I agree with Andrew that last_pgdat_dirty_ok is a better name. The old name was also bad but seeing as the area is being changed, fixing the name is harmless. -- Mel Gorman SUSE Labs
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