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mm: trivial cleanups in vmscan.c 

Utter trivia in mm/vmscan.c, mostly just reducing the linecount slightly;
most exciting change being get_scan_count() calling vmscan_swappiness()
once instead of twice.

Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins 2012-05-29 15:07:09 -07:00 committed by Linus Torvalds
parent 4d7dcca213
commit 75b00af77e
1 changed files with 10 additions and 21 deletions
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31
mm/vmscan.c
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@ -1025,12 +1025,9 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
unsigned long *nr_scanned, struct scan_control *sc,
isolate_mode_t mode, enum lru_list lru)
{
struct list_head *src;
struct list_head *src = &lruvec->lists[lru];
unsigned long nr_taken = 0;
unsigned long scan;
int file = is_file_lru(lru);
src = &lruvec->lists[lru];
for (scan = 0; scan < nr_to_scan && !list_empty(src); scan++) {
struct page *page;
@ -1058,11 +1055,8 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
}
*nr_scanned = scan;
trace_mm_vmscan_lru_isolate(sc->order,
nr_to_scan, scan,
nr_taken,
mode, file);
trace_mm_vmscan_lru_isolate(sc->order, nr_to_scan, scan,
nr_taken, mode, is_file_lru(lru));
return nr_taken;
}
@ -1140,8 +1134,7 @@ static int too_many_isolated(struct zone *zone, int file,
}
static noinline_for_stack void
putback_inactive_pages(struct lruvec *lruvec,
struct list_head *page_list)
putback_inactive_pages(struct lruvec *lruvec, struct list_head *page_list)
{
struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;
struct zone *zone = lruvec_zone(lruvec);
@ -1235,11 +1228,9 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
if (global_reclaim(sc)) {
zone->pages_scanned += nr_scanned;
if (current_is_kswapd())
__count_zone_vm_events(PGSCAN_KSWAPD, zone,
nr_scanned);
__count_zone_vm_events(PGSCAN_KSWAPD, zone, nr_scanned);
else
__count_zone_vm_events(PGSCAN_DIRECT, zone,
nr_scanned);
__count_zone_vm_events(PGSCAN_DIRECT, zone, nr_scanned);
}
spin_unlock_irq(&zone->lru_lock);
@ -1534,9 +1525,9 @@ static int inactive_file_is_low(struct lruvec *lruvec)
return inactive_file_is_low_global(lruvec_zone(lruvec));
}
static int inactive_list_is_low(struct lruvec *lruvec, int file)
static int inactive_list_is_low(struct lruvec *lruvec, enum lru_list lru)
{
if (file)
if (is_file_lru(lru))
return inactive_file_is_low(lruvec);
else
return inactive_anon_is_low(lruvec);
@ -1545,10 +1536,8 @@ static int inactive_list_is_low(struct lruvec *lruvec, int file)
static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
struct lruvec *lruvec, struct scan_control *sc)
{
int file = is_file_lru(lru);
if (is_active_lru(lru)) {
if (inactive_list_is_low(lruvec, file))
if (inactive_list_is_low(lruvec, lru))
shrink_active_list(nr_to_scan, lruvec, sc, lru);
return 0;
}
@ -1630,7 +1619,7 @@ static void get_scan_count(struct lruvec *lruvec, struct scan_control *sc,
* This scanning priority is essentially the inverse of IO cost.
*/
anon_prio = vmscan_swappiness(sc);
file_prio = 200 - vmscan_swappiness(sc);
file_prio = 200 - anon_prio;
/*
* OK, so we have swap space and a fair amount of page cache