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mm, mem-hotplug: recalculate lowmem_reserve when memory hotplug occurs

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Currently, memory hotplug calls setup_per_zone_wmarks() and
calculate_zone_inactive_ratio(), but doesn't call
setup_per_zone_lowmem_reserve().

It means the number of reserved pages aren't updated even if memory hot
plug occur.  This patch fixes it.

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>
Reviewed-by: Minchan Kim <minchan.kim@gmail.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 17:11:32 -07:00 committed by Linus Torvalds
parent 839a4fcc8a
commit 1b79acc911
3 changed files with 8 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
include/linux/mm.h
View file

@ -1381,7 +1381,7 @@ extern void set_dma_reserve(unsigned long new_dma_reserve);
extern void memmap_init_zone(unsigned long, int, unsigned long,
unsigned long, enum memmap_context);
extern void setup_per_zone_wmarks(void);
extern void calculate_zone_inactive_ratio(struct zone *zone);
extern int __meminit init_per_zone_wmark_min(void);
extern void mem_init(void);
extern void __init mmap_init(void);
extern void show_mem(unsigned int flags);

9
mm/memory_hotplug.c
View file

@ -459,8 +459,9 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages)
zone_pcp_update(zone);
mutex_unlock(&zonelists_mutex);
setup_per_zone_wmarks();
calculate_zone_inactive_ratio(zone);
init_per_zone_wmark_min();
if (onlined_pages) {
kswapd_run(zone_to_nid(zone));
node_set_state(zone_to_nid(zone), N_HIGH_MEMORY);
@ -893,8 +894,8 @@ static int __ref offline_pages(unsigned long start_pfn,
zone->zone_pgdat->node_present_pages -= offlined_pages;
totalram_pages -= offlined_pages;
setup_per_zone_wmarks();
calculate_zone_inactive_ratio(zone);
init_per_zone_wmark_min();
if (!node_present_pages(node)) {
node_clear_state(node, N_HIGH_MEMORY);
kswapd_stop(node);

4
mm/page_alloc.c
View file

@ -5094,7 +5094,7 @@ void setup_per_zone_wmarks(void)
* 1TB 101 10GB
* 10TB 320 32GB
*/
void __meminit calculate_zone_inactive_ratio(struct zone *zone)
static void __meminit calculate_zone_inactive_ratio(struct zone *zone)
{
unsigned int gb, ratio;
@ -5140,7 +5140,7 @@ static void __meminit setup_per_zone_inactive_ratio(void)
* 8192MB: 11584k
* 16384MB: 16384k
*/
static int __init init_per_zone_wmark_min(void)
int __meminit init_per_zone_wmark_min(void)
{
unsigned long lowmem_kbytes;