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mm: push lru index into shrink_[in]active_list()

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Let's toss lru index through call stack to isolate_lru_pages(), this is
better than its reconstructing from individual bits.

[akpm@linux-foundation.org: fix kerneldoc, per Minchan]
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Glauber Costa <glommer@parallels.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Konstantin Khlebnikov 2012-05-29 15:06:53 -07:00 committed by Linus Torvalds
parent 89abfab133
commit 3cb9945179
1 changed files with 17 additions and 24 deletions
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41
mm/vmscan.c
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@ -1044,27 +1044,22 @@ int __isolate_lru_page(struct page *page, isolate_mode_t mode, int file)
* @nr_scanned: The number of pages that were scanned.
* @sc: The scan_control struct for this reclaim session
* @mode: One of the LRU isolation modes
* @active: True [1] if isolating active pages
* @file: True [1] if isolating file [!anon] pages
* @lru: LRU list id for isolating
*
* returns how many pages were moved onto *@dst.
*/
static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
struct mem_cgroup_zone *mz, struct list_head *dst,
unsigned long *nr_scanned, struct scan_control *sc,
isolate_mode_t mode, int active, int file)
isolate_mode_t mode, enum lru_list lru)
{
struct lruvec *lruvec;
struct list_head *src;
unsigned long nr_taken = 0;
unsigned long scan;
int lru = LRU_BASE;
int file = is_file_lru(lru);
lruvec = mem_cgroup_zone_lruvec(mz->zone, mz->mem_cgroup);
if (active)
lru += LRU_ACTIVE;
if (file)
lru += LRU_FILE;
src = &lruvec->lists[lru];
for (scan = 0; scan < nr_to_scan && !list_empty(src); scan++) {
@ -1277,7 +1272,7 @@ update_isolated_counts(struct mem_cgroup_zone *mz,
*/
static noinline_for_stack unsigned long
shrink_inactive_list(unsigned long nr_to_scan, struct mem_cgroup_zone *mz,
struct scan_control *sc, int priority, int file)
struct scan_control *sc, int priority, enum lru_list lru)
{
LIST_HEAD(page_list);
unsigned long nr_scanned;
@ -1288,6 +1283,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct mem_cgroup_zone *mz,
unsigned long nr_dirty = 0;
unsigned long nr_writeback = 0;
isolate_mode_t isolate_mode = ISOLATE_INACTIVE;
int file = is_file_lru(lru);
struct zone *zone = mz->zone;
struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
@ -1309,7 +1305,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct mem_cgroup_zone *mz,
spin_lock_irq(&zone->lru_lock);
nr_taken = isolate_lru_pages(nr_to_scan, mz, &page_list, &nr_scanned,
sc, isolate_mode, 0, file);
sc, isolate_mode, lru);
if (global_reclaim(sc)) {
zone->pages_scanned += nr_scanned;
if (current_is_kswapd())
@ -1445,7 +1441,7 @@ static void move_active_pages_to_lru(struct zone *zone,
static void shrink_active_list(unsigned long nr_to_scan,
struct mem_cgroup_zone *mz,
struct scan_control *sc,
int priority, int file)
int priority, enum lru_list lru)
{
unsigned long nr_taken;
unsigned long nr_scanned;
@ -1457,6 +1453,7 @@ static void shrink_active_list(unsigned long nr_to_scan,
struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
unsigned long nr_rotated = 0;
isolate_mode_t isolate_mode = ISOLATE_ACTIVE;
int file = is_file_lru(lru);
struct zone *zone = mz->zone;
lru_add_drain();
@ -1469,17 +1466,14 @@ static void shrink_active_list(unsigned long nr_to_scan,
spin_lock_irq(&zone->lru_lock);
nr_taken = isolate_lru_pages(nr_to_scan, mz, &l_hold, &nr_scanned, sc,
isolate_mode, 1, file);
isolate_mode, lru);
if (global_reclaim(sc))
zone->pages_scanned += nr_scanned;
reclaim_stat->recent_scanned[file] += nr_taken;
__count_zone_vm_events(PGREFILL, zone, nr_scanned);
if (file)
__mod_zone_page_state(zone, NR_ACTIVE_FILE, -nr_taken);
else
__mod_zone_page_state(zone, NR_ACTIVE_ANON, -nr_taken);
__mod_zone_page_state(zone, NR_LRU_BASE + lru, -nr_taken);
__mod_zone_page_state(zone, NR_ISOLATED_ANON + file, nr_taken);
spin_unlock_irq(&zone->lru_lock);
@ -1535,10 +1529,8 @@ static void shrink_active_list(unsigned long nr_to_scan,
*/
reclaim_stat->recent_rotated[file] += nr_rotated;
move_active_pages_to_lru(zone, &l_active, &l_hold,
LRU_ACTIVE + file * LRU_FILE);
move_active_pages_to_lru(zone, &l_inactive, &l_hold,
LRU_BASE + file * LRU_FILE);
move_active_pages_to_lru(zone, &l_active, &l_hold, lru);
move_active_pages_to_lru(zone, &l_inactive, &l_hold, lru - LRU_ACTIVE);
__mod_zone_page_state(zone, NR_ISOLATED_ANON + file, -nr_taken);
spin_unlock_irq(&zone->lru_lock);
@ -1638,11 +1630,11 @@ static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
if (is_active_lru(lru)) {
if (inactive_list_is_low(mz, file))
shrink_active_list(nr_to_scan, mz, sc, priority, file);
shrink_active_list(nr_to_scan, mz, sc, priority, lru);
return 0;
}
return shrink_inactive_list(nr_to_scan, mz, sc, priority, file);
return shrink_inactive_list(nr_to_scan, mz, sc, priority, lru);
}
static int vmscan_swappiness(struct mem_cgroup_zone *mz,
@ -1900,7 +1892,8 @@ restart:
* rebalance the anon lru active/inactive ratio.
*/
if (inactive_anon_is_low(mz))
shrink_active_list(SWAP_CLUSTER_MAX, mz, sc, priority, 0);
shrink_active_list(SWAP_CLUSTER_MAX, mz,
sc, priority, LRU_ACTIVE_ANON);
/* reclaim/compaction might need reclaim to continue */
if (should_continue_reclaim(mz, nr_reclaimed,
@ -2339,7 +2332,7 @@ static void age_active_anon(struct zone *zone, struct scan_control *sc,
if (inactive_anon_is_low(&mz))
shrink_active_list(SWAP_CLUSTER_MAX, &mz,
sc, priority, 0);
sc, priority, LRU_ACTIVE_ANON);
memcg = mem_cgroup_iter(NULL, memcg, NULL);
} while (memcg);