mm, mem-hotplug: update pcp->stat_threshold when memory hotplug occur
Currently, cpu hotplug updates pcp->stat_threshold, but memory hotplug
doesn't. There is no reason for this.
[akpm@linux-foundation.org: fix CONFIG_SMP=n build]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index e73d103..5135983 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -261,6 +261,7 @@
extern void __dec_zone_state(struct zone *, enum zone_stat_item);
void refresh_cpu_vm_stats(int);
+void refresh_zone_stat_thresholds(void);
int calculate_pressure_threshold(struct zone *zone);
int calculate_normal_threshold(struct zone *zone);
@@ -313,6 +314,8 @@
#define set_pgdat_percpu_threshold(pgdat, callback) { }
static inline void refresh_cpu_vm_stats(int cpu) { }
+static inline void refresh_zone_stat_thresholds(void) { }
+
#endif /* CONFIG_SMP */
extern const char * const vmstat_text[];
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e133cea..7777332 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -39,6 +39,7 @@
#include <linux/memory_hotplug.h>
#include <linux/nodemask.h>
#include <linux/vmalloc.h>
+#include <linux/vmstat.h>
#include <linux/mempolicy.h>
#include <linux/stop_machine.h>
#include <linux/sort.h>
@@ -5152,6 +5153,7 @@
if (min_free_kbytes > 65536)
min_free_kbytes = 65536;
setup_per_zone_wmarks();
+ refresh_zone_stat_thresholds();
setup_per_zone_lowmem_reserve();
setup_per_zone_inactive_ratio();
return 0;
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 209546a..20c18b7 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -157,7 +157,7 @@
/*
* Refresh the thresholds for each zone.
*/
-static void refresh_zone_stat_thresholds(void)
+void refresh_zone_stat_thresholds(void)
{
struct zone *zone;
int cpu;
@@ -1201,7 +1201,6 @@
#ifdef CONFIG_SMP
int cpu;
- refresh_zone_stat_thresholds();
register_cpu_notifier(&vmstat_notifier);
for_each_online_cpu(cpu)