diff options
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 915dceb..9c7e57c 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1724,13 +1724,13 @@ static void shrink_zone(int priority, struct zone *zone, * If a zone is deemed to be full of pinned pages then just give it a light * scan then give up on it. */ -static int shrink_zones(int priority, struct zonelist *zonelist, +static bool shrink_zones(int priority, struct zonelist *zonelist, struct scan_control *sc) { enum zone_type high_zoneidx = gfp_zone(sc->gfp_mask); struct zoneref *z; struct zone *zone; - int progress = 0; + bool all_unreclaimable = true; for_each_zone_zonelist_nodemask(zone, z, zonelist, high_zoneidx, sc->nodemask) { @@ -1757,9 +1757,9 @@ static int shrink_zones(int priority, struct zonelist *zonelist, } shrink_zone(priority, zone, sc); - progress = 1; + all_unreclaimable = false; } - return progress; + return all_unreclaimable; } /* @@ -1782,7 +1782,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist, struct scan_control *sc) { int priority; - unsigned long ret = 0; + bool all_unreclaimable; unsigned long total_scanned = 0; struct reclaim_state *reclaim_state = current->reclaim_state; unsigned long lru_pages = 0; @@ -1813,7 +1813,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist, sc->nr_scanned = 0; if (!priority) disable_swap_token(); - ret = shrink_zones(priority, zonelist, sc); + all_unreclaimable = shrink_zones(priority, zonelist, sc); /* * Don't shrink slabs when reclaiming memory from * over limit cgroups @@ -1826,10 +1826,8 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist, } } total_scanned += sc->nr_scanned; - if (sc->nr_reclaimed >= sc->nr_to_reclaim) { - ret = sc->nr_reclaimed; + if (sc->nr_reclaimed >= sc->nr_to_reclaim) goto out; - } /* * Try to write back as many pages as we just scanned. This @@ -1849,9 +1847,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist, priority < DEF_PRIORITY - 2) congestion_wait(BLK_RW_ASYNC, HZ/10); } - /* top priority shrink_zones still had more to do? don't OOM, then */ - if (ret && scanning_global_lru(sc)) - ret = sc->nr_reclaimed; + out: /* * Now that we've scanned all the zones at this priority level, note @@ -1877,7 +1873,14 @@ out: delayacct_freepages_end(); put_mems_allowed(); - return ret; + if (sc->nr_reclaimed) + return sc->nr_reclaimed; + + /* top priority shrink_zones still had more to do? don't OOM, then */ + if (scanning_global_lru(sc) && !all_unreclaimable) + return 1; + + return 0; } unsigned long try_to_free_pages(struct zonelist *zonelist, int order, |