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mm/vmscan.c: simplify shrink_inactive_list() 

This merges together duplicated patterns of code.  Also, replace
count_memcg_events() with its irq-careless namesake, because they are
already called in interrupts disabled context.

Link: http://lkml.kernel.org/r/2ece1df4-2989-bc9b-6172-61e9fdde5bfd@virtuozzo.com
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill Tkhai 2019-05-13 17:22:33 -07:00 committed by Linus Torvalds
parent c553ea4fdf
commit f46b79120e
1 changed files with 9 additions and 22 deletions
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31
mm/vmscan.c
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@ -1907,6 +1907,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
unsigned long nr_taken;
struct reclaim_stat stat;
int file = is_file_lru(lru);
enum vm_event_item item;
struct pglist_data *pgdat = lruvec_pgdat(lruvec);
struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;
bool stalled = false;
@ -1934,17 +1935,10 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
__mod_node_page_state(pgdat, NR_ISOLATED_ANON + file, nr_taken);
reclaim_stat->recent_scanned[file] += nr_taken;
if (current_is_kswapd()) {
if (global_reclaim(sc))
__count_vm_events(PGSCAN_KSWAPD, nr_scanned);
count_memcg_events(lruvec_memcg(lruvec), PGSCAN_KSWAPD,
nr_scanned);
} else {
if (global_reclaim(sc))
__count_vm_events(PGSCAN_DIRECT, nr_scanned);
count_memcg_events(lruvec_memcg(lruvec), PGSCAN_DIRECT,
nr_scanned);
}
item = current_is_kswapd() ? PGSCAN_KSWAPD : PGSCAN_DIRECT;
if (global_reclaim(sc))
__count_vm_events(item, nr_scanned);
__count_memcg_events(lruvec_memcg(lruvec), item, nr_scanned);
spin_unlock_irq(&pgdat->lru_lock);
if (nr_taken == 0)
@ -1955,17 +1949,10 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
spin_lock_irq(&pgdat->lru_lock);
if (current_is_kswapd()) {
if (global_reclaim(sc))
__count_vm_events(PGSTEAL_KSWAPD, nr_reclaimed);
count_memcg_events(lruvec_memcg(lruvec), PGSTEAL_KSWAPD,
nr_reclaimed);
} else {
if (global_reclaim(sc))
__count_vm_events(PGSTEAL_DIRECT, nr_reclaimed);
count_memcg_events(lruvec_memcg(lruvec), PGSTEAL_DIRECT,
nr_reclaimed);
}
item = current_is_kswapd() ? PGSTEAL_KSWAPD : PGSTEAL_DIRECT;
if (global_reclaim(sc))
__count_vm_events(item, nr_reclaimed);
__count_memcg_events(lruvec_memcg(lruvec), item, nr_reclaimed);
reclaim_stat->recent_rotated[0] = stat.nr_activate[0];
reclaim_stat->recent_rotated[1] = stat.nr_activate[1];