linux-kernel - [PATCH 1/5] mm: compaction: Update comment in try_to_compact

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Message-Id: <1344962492-1914-2-git-send-email-mgorman@suse.de>
Date:	Tue, 14 Aug 2012 17:41:28 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rik van Riel <riel@...hat.com>, Minchan Kim <minchan@...nel.org>,
	Jim Schutt <jaschut@...dia.gov>, Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>, Mel Gorman <mgorman@...e.de>
Subject: [PATCH 1/5] mm: compaction: Update comment in try_to_compact_pages

The comment about order applied when the check was
order > PAGE_ALLOC_COSTLY_ORDER which has not been the case since
[c5a73c3d: thp: use compaction for all allocation orders]. Fixing
the comment while I'm in the general area.

Signed-off-by: Mel Gorman <mgorman@...e.de>
Reviewed-by: Rik van Riel <riel@...hat.com>
Reviewed-by: Minchan Kim <minchan@...nel.org>
---
 mm/compaction.c |    6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 36276e6..ea588eb 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -812,11 +812,7 @@ unsigned long try_to_compact_pages(struct zonelist *zonelist,
 	struct zone *zone;
 	int rc = COMPACT_SKIPPED;
 
-	/*
-	 * Check whether it is worth even starting compaction. The order check is
-	 * made because an assumption is made that the page allocator can satisfy
-	 * the "cheaper" orders without taking special steps
-	 */
+	/* Check if the GFP flags allow compaction */
 	if (!order || !may_enter_fs || !may_perform_io)
 		return rc;
 
-- 
1.7.9.2

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