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mm, mem-hotplug: update pcp->stat_threshold when memory hotplug occur

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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>
This commit is contained in:
KOSAKI Motohiro 2011-05-24 17:11:33 -07:00 committed by Linus Torvalds
parent 1b79acc911
commit a6cccdc36c
3 changed files with 6 additions and 2 deletions
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3
include/linux/vmstat.h
View File

@ -261,6 +261,7 @@ extern void dec_zone_state(struct zone *, enum zone_stat_item);
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 @@ static inline void __dec_zone_page_state(struct page *page,
#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[];

2
mm/page_alloc.c
View File

@ -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 @@ int __meminit init_per_zone_wmark_min(void)
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;

3
mm/vmstat.c
View File

@ -157,7 +157,7 @@ int calculate_normal_threshold(struct zone *zone)
/*
* 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 @@ static int __init setup_vmstat(void)
#ifdef CONFIG_SMP
int cpu;
refresh_zone_stat_thresholds();
register_cpu_notifier(&vmstat_notifier);
for_each_online_cpu(cpu)