diff options
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 1f56a80..9b6497e 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1862,7 +1862,7 @@ static void get_scan_count(struct lruvec *lruvec, struct scan_control *sc, struct zone *zone = lruvec_zone(lruvec); unsigned long anon_prio, file_prio; enum scan_balance scan_balance; - unsigned long anon, file, free; + unsigned long anon, file; bool force_scan = false; unsigned long ap, fp; enum lru_list lru; @@ -1916,20 +1916,6 @@ static void get_scan_count(struct lruvec *lruvec, struct scan_control *sc, get_lru_size(lruvec, LRU_INACTIVE_FILE); /* - * If it's foreseeable that reclaiming the file cache won't be - * enough to get the zone back into a desirable shape, we have - * to swap. Better start now and leave the - probably heavily - * thrashing - remaining file pages alone. - */ - if (global_reclaim(sc)) { - free = zone_page_state(zone, NR_FREE_PAGES); - if (unlikely(file + free <= high_wmark_pages(zone))) { - scan_balance = SCAN_ANON; - goto out; - } - } - - /* * There is enough inactive page cache, do not reclaim * anything from the anonymous working set right now. */ @@ -2314,15 +2300,18 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc) unsigned long lru_pages = 0; bool aborted_reclaim = false; struct reclaim_state *reclaim_state = current->reclaim_state; + gfp_t orig_mask; struct shrink_control shrink = { .gfp_mask = sc->gfp_mask, }; + enum zone_type requested_highidx = gfp_zone(sc->gfp_mask); /* * If the number of buffer_heads in the machine exceeds the maximum * allowed level, force direct reclaim to scan the highmem zone as * highmem pages could be pinning lowmem pages storing buffer_heads */ + orig_mask = sc->gfp_mask; if (buffer_heads_over_limit) sc->gfp_mask |= __GFP_HIGHMEM; @@ -2356,7 +2345,8 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc) * noticeable problem, like transparent huge * page allocations. */ - if (compaction_ready(zone, sc)) { + if ((zonelist_zone_idx(z) <= requested_highidx) + && compaction_ready(zone, sc)) { aborted_reclaim = true; continue; } @@ -2393,6 +2383,12 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc) } } + /* + * Restore to original mask to avoid the impact on the caller if we + * promoted it to __GFP_HIGHMEM. + */ + sc->gfp_mask = orig_mask; + return aborted_reclaim; } |