mm: use zone->present_pages instead of zone->managed_pages where appropriate
Now we have zone->managed_pages for "pages managed by the buddy system
in the zone", so replace zone->present_pages with zone->managed_pages if
what the user really wants is number of allocatable pages.
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Cc: Maciej Rutecki <maciej.rutecki@gmail.com>
Cc: Chris Clayton <chris2553@googlemail.com>
Cc: "Rafael J . Wysocki" <rjw@sisk.pl>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Minchan Kim <minchan@kernel.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Jianguo Wu <wujianguo@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 4093b99..8fde2fc 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2010,7 +2010,7 @@
* a reasonable chance of completing and allocating the page
*/
balance_gap = min(low_wmark_pages(zone),
- (zone->present_pages + KSWAPD_ZONE_BALANCE_GAP_RATIO-1) /
+ (zone->managed_pages + KSWAPD_ZONE_BALANCE_GAP_RATIO-1) /
KSWAPD_ZONE_BALANCE_GAP_RATIO);
watermark = high_wmark_pages(zone) + balance_gap + (2UL << sc->order);
watermark_ok = zone_watermark_ok_safe(zone, 0, watermark, 0, 0);
@@ -2525,7 +2525,7 @@
*/
static bool pgdat_balanced(pg_data_t *pgdat, int order, int classzone_idx)
{
- unsigned long present_pages = 0;
+ unsigned long managed_pages = 0;
unsigned long balanced_pages = 0;
int i;
@@ -2536,7 +2536,7 @@
if (!populated_zone(zone))
continue;
- present_pages += zone->present_pages;
+ managed_pages += zone->managed_pages;
/*
* A special case here:
@@ -2546,18 +2546,18 @@
* they must be considered balanced here as well!
*/
if (zone->all_unreclaimable) {
- balanced_pages += zone->present_pages;
+ balanced_pages += zone->managed_pages;
continue;
}
if (zone_balanced(zone, order, 0, i))
- balanced_pages += zone->present_pages;
+ balanced_pages += zone->managed_pages;
else if (!order)
return false;
}
if (order)
- return balanced_pages >= (present_pages >> 2);
+ return balanced_pages >= (managed_pages >> 2);
else
return true;
}
@@ -2745,7 +2745,7 @@
* of the zone, whichever is smaller.
*/
balance_gap = min(low_wmark_pages(zone),
- (zone->present_pages +
+ (zone->managed_pages +
KSWAPD_ZONE_BALANCE_GAP_RATIO-1) /
KSWAPD_ZONE_BALANCE_GAP_RATIO);
/*
