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memcg: add zone_reclaim_stat

Browse source 
Introduce mem_cgroup_per_zone::reclaim_stat member and its statics
collecting function.

Now, get_scan_ratio() can calculate correct value on memcg reclaim.

[[email protected]: avoid reclaim_stat oops when disabled]
Acked-by: KAMEZAWA Hiroyuki <[email protected]>
Acked-by: Rik van Riel <[email protected]>
Signed-off-by: KOSAKI Motohiro <[email protected]>
Cc: Balbir Singh <[email protected]>
Cc: Daisuke Nishimura <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Signed-off-by: Hugh Dickins <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
KOSAKI Motohiro 2009-01-07 18:08:20 -08:00 • committed by Linus Torvalds
commit 3e2f41f1f6
4 changed files with 83 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

29
mm/memcontrol.c
View file

@ -103,6 +103,8 @@ struct mem_cgroup_per_zone {
*/
struct list_head lists[NR_LRU_LISTS];
unsigned long count[NR_LRU_LISTS];
struct zone_reclaim_stat reclaim_stat;
};
/* Macro for accessing counter */
#define MEM_CGROUP_ZSTAT(mz, idx) ((mz)->count[(idx)])
@ -458,6 +460,33 @@ unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
return MEM_CGROUP_ZSTAT(mz, lru);
}
struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
struct zone *zone)
{
int nid = zone->zone_pgdat->node_id;
int zid = zone_idx(zone);
struct mem_cgroup_per_zone *mz = mem_cgroup_zoneinfo(memcg, nid, zid);
return &mz->reclaim_stat;
}
struct zone_reclaim_stat *
mem_cgroup_get_reclaim_stat_from_page(struct page *page)
{
struct page_cgroup *pc;
struct mem_cgroup_per_zone *mz;
if (mem_cgroup_disabled())
return NULL;
pc = lookup_page_cgroup(page);
mz = page_cgroup_zoneinfo(pc);
if (!mz)
return NULL;
return &mz->reclaim_stat;
}
unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
struct list_head *dst,
unsigned long *scanned, int order,

34
mm/swap.c
View file

@ -151,13 +151,32 @@ void rotate_reclaimable_page(struct page *page)
}
}
static void update_page_reclaim_stat(struct zone *zone, struct page *page,
int file, int rotated)
{
struct zone_reclaim_stat *reclaim_stat = &zone->reclaim_stat;
struct zone_reclaim_stat *memcg_reclaim_stat;
memcg_reclaim_stat = mem_cgroup_get_reclaim_stat_from_page(page);
reclaim_stat->recent_scanned[file]++;
if (rotated)
reclaim_stat->recent_rotated[file]++;
if (!memcg_reclaim_stat)
return;
memcg_reclaim_stat->recent_scanned[file]++;
if (rotated)
memcg_reclaim_stat->recent_rotated[file]++;
}
/*
* FIXME: speed this up?
*/
void activate_page(struct page *page)
{
struct zone *zone = page_zone(page);
struct zone_reclaim_stat *reclaim_stat = &zone->reclaim_stat;
spin_lock_irq(&zone->lru_lock);
if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
@ -170,8 +189,7 @@ void activate_page(struct page *page)
add_page_to_lru_list(zone, page, lru);
__count_vm_event(PGACTIVATE);
reclaim_stat->recent_rotated[!!file]++;
reclaim_stat->recent_scanned[!!file]++;
update_page_reclaim_stat(zone, page, !!file, 1);
}
spin_unlock_irq(&zone->lru_lock);
}
@ -386,7 +404,6 @@ void ____pagevec_lru_add(struct pagevec *pvec, enum lru_list lru)
{
int i;
struct zone *zone = NULL;
struct zone_reclaim_stat *reclaim_stat = NULL;
VM_BUG_ON(is_unevictable_lru(lru));
@ -394,24 +411,23 @@ void ____pagevec_lru_add(struct pagevec *pvec, enum lru_list lru)
struct page *page = pvec->pages[i];
struct zone *pagezone = page_zone(page);
int file;
int active;
if (pagezone != zone) {
if (zone)
spin_unlock_irq(&zone->lru_lock);
zone = pagezone;
reclaim_stat = &zone->reclaim_stat;
spin_lock_irq(&zone->lru_lock);
}
VM_BUG_ON(PageActive(page));
VM_BUG_ON(PageUnevictable(page));
VM_BUG_ON(PageLRU(page));
SetPageLRU(page);
active = is_active_lru(lru);
file = is_file_lru(lru);
reclaim_stat->recent_scanned[file]++;
if (is_active_lru(lru)) {
if (active)
SetPageActive(page);
reclaim_stat->recent_rotated[file]++;
}
update_page_reclaim_stat(zone, page, file, active);
add_page_to_lru_list(zone, page, lru);
}
if (zone)

27
mm/vmscan.c
View file

@ -133,6 +133,9 @@ static DECLARE_RWSEM(shrinker_rwsem);
static struct zone_reclaim_stat *get_reclaim_stat(struct zone *zone,
struct scan_control *sc)
{
if (!scan_global_lru(sc))
return mem_cgroup_get_reclaim_stat(sc->mem_cgroup, zone);
return &zone->reclaim_stat;
}
@ -1087,17 +1090,14 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
__mod_zone_page_state(zone, NR_INACTIVE_ANON,
-count[LRU_INACTIVE_ANON]);
if (scan_global_lru(sc)) {
if (scan_global_lru(sc))
zone->pages_scanned += nr_scan;
reclaim_stat->recent_scanned[0] +=
count[LRU_INACTIVE_ANON];
reclaim_stat->recent_scanned[0] +=
count[LRU_ACTIVE_ANON];
reclaim_stat->recent_scanned[1] +=
count[LRU_INACTIVE_FILE];
reclaim_stat->recent_scanned[1] +=
count[LRU_ACTIVE_FILE];
}
reclaim_stat->recent_scanned[0] += count[LRU_INACTIVE_ANON];
reclaim_stat->recent_scanned[0] += count[LRU_ACTIVE_ANON];
reclaim_stat->recent_scanned[1] += count[LRU_INACTIVE_FILE];
reclaim_stat->recent_scanned[1] += count[LRU_ACTIVE_FILE];
spin_unlock_irq(&zone->lru_lock);
nr_scanned += nr_scan;
@ -1155,7 +1155,7 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
SetPageLRU(page);
lru = page_lru(page);
add_page_to_lru_list(zone, page, lru);
if (PageActive(page) && scan_global_lru(sc)) {
if (PageActive(page)) {
int file = !!page_is_file_cache(page);
reclaim_stat->recent_rotated[file]++;
}
@ -1230,8 +1230,8 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
*/
if (scan_global_lru(sc)) {
zone->pages_scanned += pgscanned;
reclaim_stat->recent_scanned[!!file] += pgmoved;
}
reclaim_stat->recent_scanned[!!file] += pgmoved;
if (file)
__mod_zone_page_state(zone, NR_ACTIVE_FILE, -pgmoved);
@ -1272,8 +1272,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
* This helps balance scan pressure between file and anonymous
* pages in get_scan_ratio.
*/
if (scan_global_lru(sc))
reclaim_stat->recent_rotated[!!file] += pgmoved;
reclaim_stat->recent_rotated[!!file] += pgmoved;
while (!list_empty(&l_inactive)) {
page = lru_to_page(&l_inactive);