linux-kernel - [PATCH] mm, compaction: Capture a page under direct compaction -fix

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Date:   Fri, 1 Feb 2019 14:38:53 +0000
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Vlastimil Babka <vbabka@...e.cz>,
        David Rientjes <rientjes@...gle.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>
Subject: [PATCH] mm, compaction: Capture a page under direct compaction -fix

Vlastimil pointed out that a check for isolation is redundant in
__free_one_page as compaction_capture checks for it.

This is a fix for the mmotm patch
mm-compaction-capture-a-page-under-direct-compaction.patch

Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>
---
 mm/page_alloc.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d61174bb0333..b2eee9b71986 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -887,8 +887,7 @@ static inline void __free_one_page(struct page *page,
 continue_merging:
 	while (order < max_order - 1) {
 		if (compaction_capture(capc, page, order, migratetype)) {
-			if (likely(!is_migrate_isolate(migratetype)))
-				__mod_zone_freepage_state(zone, -(1 << order),
+			__mod_zone_freepage_state(zone, -(1 << order),
 								migratetype);
 			return;
 		}