From: Vlastimil Babka <vbabka@xxxxxxx> Subject: mm, compaction: cleanup unused functions Since kswapd compaction moved to kcompactd, compact_pgdat() is not called anymore, so we remove it. The only caller of __compact_pgdat() is compact_node(), so we merge them and remove code that was only reachable from kswapd. Link: http://lkml.kernel.org/r/20160810091226.6709-3-vbabka@xxxxxxx Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx> Tested-by: Lorenzo Stoakes <lstoakes@xxxxxxxxx> Acked-by: Michal Hocko <mhocko@xxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Cc: David Rientjes <rientjes@xxxxxxxxxx> Cc: Rik van Riel <riel@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/compaction.h | 5 -- mm/compaction.c | 60 +++++++++-------------------------- 2 files changed, 17 insertions(+), 48 deletions(-) diff -puN include/linux/compaction.h~mm-compaction-cleanup-unused-functions include/linux/compaction.h --- a/include/linux/compaction.h~mm-compaction-cleanup-unused-functions +++ a/include/linux/compaction.h @@ -70,7 +70,6 @@ extern int fragmentation_index(struct zo extern enum compact_result try_to_compact_pages(gfp_t gfp_mask, unsigned int order, unsigned int alloc_flags, const struct alloc_context *ac, enum compact_priority prio); -extern void compact_pgdat(pg_data_t *pgdat, int order); extern void reset_isolation_suitable(pg_data_t *pgdat); extern enum compact_result compaction_suitable(struct zone *zone, int order, unsigned int alloc_flags, int classzone_idx); @@ -154,10 +153,6 @@ extern void kcompactd_stop(int nid); extern void wakeup_kcompactd(pg_data_t *pgdat, int order, int classzone_idx); #else -static inline void compact_pgdat(pg_data_t *pgdat, int order) -{ -} - static inline void reset_isolation_suitable(pg_data_t *pgdat) { } diff -puN mm/compaction.c~mm-compaction-cleanup-unused-functions mm/compaction.c --- a/mm/compaction.c~mm-compaction-cleanup-unused-functions +++ a/mm/compaction.c @@ -1736,10 +1736,18 @@ enum compact_result try_to_compact_pages /* Compact all zones within a node */ -static void __compact_pgdat(pg_data_t *pgdat, struct compact_control *cc) +static void compact_node(int nid) { + pg_data_t *pgdat = NODE_DATA(nid); int zoneid; struct zone *zone; + struct compact_control cc = { + .order = -1, + .mode = MIGRATE_SYNC, + .ignore_skip_hint = true, + .whole_zone = true, + }; + for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) { @@ -1747,53 +1755,19 @@ static void __compact_pgdat(pg_data_t *p if (!populated_zone(zone)) continue; - cc->nr_freepages = 0; - cc->nr_migratepages = 0; - cc->zone = zone; - INIT_LIST_HEAD(&cc->freepages); - INIT_LIST_HEAD(&cc->migratepages); - - if (is_via_compact_memory(cc->order) || - !compaction_deferred(zone, cc->order)) - compact_zone(zone, cc); - - VM_BUG_ON(!list_empty(&cc->freepages)); - VM_BUG_ON(!list_empty(&cc->migratepages)); + cc.nr_freepages = 0; + cc.nr_migratepages = 0; + cc.zone = zone; + INIT_LIST_HEAD(&cc.freepages); + INIT_LIST_HEAD(&cc.migratepages); - if (is_via_compact_memory(cc->order)) - continue; + compact_zone(zone, &cc); - if (zone_watermark_ok(zone, cc->order, - low_wmark_pages(zone), 0, 0)) - compaction_defer_reset(zone, cc->order, false); + VM_BUG_ON(!list_empty(&cc.freepages)); + VM_BUG_ON(!list_empty(&cc.migratepages)); } } -void compact_pgdat(pg_data_t *pgdat, int order) -{ - struct compact_control cc = { - .order = order, - .mode = MIGRATE_ASYNC, - }; - - if (!order) - return; - - __compact_pgdat(pgdat, &cc); -} - -static void compact_node(int nid) -{ - struct compact_control cc = { - .order = -1, - .mode = MIGRATE_SYNC, - .ignore_skip_hint = true, - .whole_zone = true, - }; - - __compact_pgdat(NODE_DATA(nid), &cc); -} - /* Compact all nodes in the system */ static void compact_nodes(void) { _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
