pg_data_t should be zero out before reaching free_area_init_core
so remove unnecessary initialization.
Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
---
include/linux/vmstat.h | 5 -----
mm/page_alloc.c | 9 ++-------
2 files changed, 2 insertions(+), 12 deletions(-)
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 65efb92..ad2cfd5 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -179,11 +179,6 @@ extern void zone_statistics(struct zone *, struct zone *, gfp_t gfp);
#define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
#define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
-static inline void zap_zone_vm_stats(struct zone *zone)
-{
- memset(zone->vm_stat, 0, sizeof(zone->vm_stat));
-}
-
extern void inc_zone_state(struct zone *, enum zone_stat_item);
#ifdef CONFIG_SMP
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2037eeb..7b09ecc 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4376,6 +4376,8 @@ void __init set_pageblock_order(void)
* - mark all pages reserved
* - mark all memory queues empty
* - clear the memory bitmaps
+ *
+ * NOTE: pgdat should get zeroed by caller.
*/
static void __paginginit free_area_init_core(struct pglist_data *pgdat,
unsigned long *zones_size, unsigned long *zholes_size)
@@ -4386,10 +4388,8 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat,
int ret;
pgdat_resize_init(pgdat);
- pgdat->nr_zones = 0;
init_waitqueue_head(&pgdat->kswapd_wait);
init_waitqueue_head(&pgdat->pfmemalloc_wait);
- pgdat->kswapd_max_order = 0;
pgdat_page_cgroup_init(pgdat);
for (j = 0; j < MAX_NR_ZONES; j++) {
@@ -4450,11 +4450,6 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat,
zone_pcp_init(zone);
lruvec_init(&zone->lruvec, zone);
- zap_zone_vm_stats(zone);
- zone->flags = 0;
-#ifdef CONFIG_MEMORY_ISOLATION
- zone->nr_pageblock_isolate = 0;
-#endif
if (!size)
continue;
--
1.7.9.5
--
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