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Date: Mon, 13 Jul 2020 15:41:49 +0900 From: js1304@...il.com To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, kernel-team@....com, Vlastimil Babka <vbabka@...e.cz>, Christoph Hellwig <hch@...radead.org>, Roman Gushchin <guro@...com>, Mike Kravetz <mike.kravetz@...cle.com>, Naoya Horiguchi <n-horiguchi@...jp.nec.com>, Michal Hocko <mhocko@...e.com>, Joonsoo Kim <iamjoonsoo.kim@....com> Subject: [PATCH v5 1/9] mm/page_isolation: prefer the node of the source page From: Joonsoo Kim <iamjoonsoo.kim@....com> For locality, it's better to migrate the page to the same node rather than the node of the current caller's cpu. Acked-by: Roman Gushchin <guro@...com> Acked-by: Michal Hocko <mhocko@...e.com> Reviewed-by: Vlastimil Babka <vbabka@...e.cz> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com> --- mm/page_isolation.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/page_isolation.c b/mm/page_isolation.c index f6d07c5..aec26d9 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -309,5 +309,7 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn, struct page *alloc_migrate_target(struct page *page, unsigned long private) { - return new_page_nodemask(page, numa_node_id(), &node_states[N_MEMORY]); + int nid = page_to_nid(page); + + return new_page_nodemask(page, nid, &node_states[N_MEMORY]); } -- 2.7.4
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