linux-kernel - [PATCH v3 11/13] mm, compaction: pass gfp mask to compact

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Message-Id: <1403279383-5862-12-git-send-email-vbabka@suse.cz>
Date:	Fri, 20 Jun 2014 17:49:41 +0200
From:	Vlastimil Babka <vbabka@...e.cz>
To:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>
Cc:	Minchan Kim <minchan@...nel.org>, Mel Gorman <mgorman@...e.de>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Michal Nazarewicz <mina86@...a86.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Christoph Lameter <cl@...ux.com>,
	Rik van Riel <riel@...hat.com>,
	Zhang Yanfei <zhangyanfei@...fujitsu.com>,
	linux-kernel@...r.kernel.org, Vlastimil Babka <vbabka@...e.cz>
Subject: [PATCH v3 11/13] mm, compaction: pass gfp mask to compact_control

From: David Rientjes <rientjes@...gle.com>

struct compact_control currently converts the gfp mask to a migratetype, but we
need the entire gfp mask in a follow-up patch.

Pass the entire gfp mask as part of struct compact_control.

Signed-off-by: David Rientjes <rientjes@...gle.com>
Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
Cc: Minchan Kim <minchan@...nel.org>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Joonsoo Kim <iamjoonsoo.kim@....com>
Cc: Michal Nazarewicz <mina86@...a86.com>
Cc: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc: Christoph Lameter <cl@...ux.com>
Cc: Rik van Riel <riel@...hat.com>
---
 mm/compaction.c | 12 +++++++-----
 mm/internal.h   |  2 +-
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 32c768b..d4e0c13 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -975,8 +975,8 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone,
 	return cc->nr_migratepages ? ISOLATE_SUCCESS : ISOLATE_NONE;
 }
 
-static int compact_finished(struct zone *zone,
-			    struct compact_control *cc)
+static int compact_finished(struct zone *zone, struct compact_control *cc,
+			    const int migratetype)
 {
 	unsigned int order;
 	unsigned long watermark;
@@ -1022,7 +1022,7 @@ static int compact_finished(struct zone *zone,
 		struct free_area *area = &zone->free_area[order];
 
 		/* Job done if page is free of the right migratetype */
-		if (!list_empty(&area->free_list[cc->migratetype]))
+		if (!list_empty(&area->free_list[migratetype]))
 			return COMPACT_PARTIAL;
 
 		/* Job done if allocation would set block type */
@@ -1088,6 +1088,7 @@ static int compact_zone(struct zone *zone, struct compact_control *cc)
 	int ret;
 	unsigned long start_pfn = zone->zone_start_pfn;
 	unsigned long end_pfn = zone_end_pfn(zone);
+	const int migratetype = gfpflags_to_migratetype(cc->gfp_mask);
 	const bool sync = cc->mode != MIGRATE_ASYNC;
 
 	ret = compaction_suitable(zone, cc->order);
@@ -1130,7 +1131,8 @@ static int compact_zone(struct zone *zone, struct compact_control *cc)
 
 	migrate_prep_local();
 
-	while ((ret = compact_finished(zone, cc)) == COMPACT_CONTINUE) {
+	while ((ret = compact_finished(zone, cc, migratetype)) ==
+						COMPACT_CONTINUE) {
 		int err;
 
 		switch (isolate_migratepages(zone, cc)) {
@@ -1185,7 +1187,7 @@ static unsigned long compact_zone_order(struct zone *zone, int order,
 		.nr_freepages = 0,
 		.nr_migratepages = 0,
 		.order = order,
-		.migratetype = gfpflags_to_migratetype(gfp_mask),
+		.gfp_mask = gfp_mask,
 		.zone = zone,
 		.mode = mode,
 	};
diff --git a/mm/internal.h b/mm/internal.h
index 584cd69..dd17a40 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -149,7 +149,7 @@ struct compact_control {
 	bool finished_update_migrate;
 
 	int order;			/* order a direct compactor needs */
-	int migratetype;		/* MOVABLE, RECLAIMABLE etc */
+	const gfp_t gfp_mask;		/* gfp mask of a direct compactor */
 	struct zone *zone;
 	enum compact_contended contended; /* Signal need_sched() or lock
 					   * contention detected during
-- 
1.8.4.5

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