mm, compaction: pass gfp mask to compact_control

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@google.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/compaction.c b/mm/compaction.c
index 7c687c0..15163b4 100644 (file)
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1032,8 +1032,8 @@ 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;
@@ -1079,7 +1079,7 @@ 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 */
@@ -1145,6 +1145,7 @@ 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);
@@ -1187,7 +1188,8 @@ 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)) {
@@ -1242,7 +1244,7 @@ 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 86ae964..8293040 100644 (file)
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -142,7 +142,7 @@ 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;
        int contended;                  /* Signal need_sched() or lock
                                         * contention detected during