diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 76 |
1 files changed, 61 insertions, 15 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 794e6715c226..a13ded1938f0 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1981,14 +1981,20 @@ static struct page * __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order, struct zonelist *zonelist, enum zone_type high_zoneidx, nodemask_t *nodemask, int alloc_flags, struct zone *preferred_zone, - int migratetype, unsigned long *did_some_progress, - bool sync_migration) + int migratetype, bool sync_migration, + bool *deferred_compaction, + unsigned long *did_some_progress) { struct page *page; - if (!order || compaction_deferred(preferred_zone)) + if (!order) return NULL; + if (compaction_deferred(preferred_zone)) { + *deferred_compaction = true; + return NULL; + } + current->flags |= PF_MEMALLOC; *did_some_progress = try_to_compact_pages(zonelist, order, gfp_mask, nodemask, sync_migration); @@ -2016,7 +2022,13 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order, * but not enough to satisfy watermarks. */ count_vm_event(COMPACTFAIL); - defer_compaction(preferred_zone); + + /* + * As async compaction considers a subset of pageblocks, only + * defer if the failure was a sync compaction failure. + */ + if (sync_migration) + defer_compaction(preferred_zone); cond_resched(); } @@ -2028,8 +2040,9 @@ static inline struct page * __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order, struct zonelist *zonelist, enum zone_type high_zoneidx, nodemask_t *nodemask, int alloc_flags, struct zone *preferred_zone, - int migratetype, unsigned long *did_some_progress, - bool sync_migration) + int migratetype, bool sync_migration, + bool *deferred_compaction, + unsigned long *did_some_progress) { return NULL; } @@ -2179,6 +2192,7 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order, unsigned long pages_reclaimed = 0; unsigned long did_some_progress; bool sync_migration = false; + bool deferred_compaction = false; /* * In the slowpath, we sanity check order to avoid ever trying to @@ -2259,12 +2273,22 @@ rebalance: zonelist, high_zoneidx, nodemask, alloc_flags, preferred_zone, - migratetype, &did_some_progress, - sync_migration); + migratetype, sync_migration, + &deferred_compaction, + &did_some_progress); if (page) goto got_pg; sync_migration = true; + /* + * If compaction is deferred for high-order allocations, it is because + * sync compaction recently failed. In this is the case and the caller + * has requested the system not be heavily disrupted, fail the + * allocation now instead of entering direct reclaim + */ + if (deferred_compaction && (gfp_mask & __GFP_NO_KSWAPD)) + goto nopage; + /* Try direct reclaim and then allocating */ page = __alloc_pages_direct_reclaim(gfp_mask, order, zonelist, high_zoneidx, @@ -2328,8 +2352,9 @@ rebalance: zonelist, high_zoneidx, nodemask, alloc_flags, preferred_zone, - migratetype, &did_some_progress, - sync_migration); + migratetype, sync_migration, + &deferred_compaction, + &did_some_progress); if (page) goto got_pg; } @@ -4237,7 +4262,7 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat, for (j = 0; j < MAX_NR_ZONES; j++) { struct zone *zone = pgdat->node_zones + j; unsigned long size, realsize, memmap_pages; - enum lru_list l; + enum lru_list lru; size = zone_spanned_pages_in_node(nid, j, zones_size); realsize = size - zone_absent_pages_in_node(nid, j, @@ -4287,8 +4312,8 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat, zone->zone_pgdat = pgdat; zone_pcp_init(zone); - for_each_lru(l) - INIT_LIST_HEAD(&zone->lru[l].list); + for_each_lru(lru) + INIT_LIST_HEAD(&zone->lruvec.lists[lru]); zone->reclaim_stat.recent_rotated[0] = 0; zone->reclaim_stat.recent_rotated[1] = 0; zone->reclaim_stat.recent_scanned[0] = 0; @@ -4642,8 +4667,10 @@ static void check_for_regular_memory(pg_data_t *pgdat) for (zone_type = 0; zone_type <= ZONE_NORMAL; zone_type++) { struct zone *zone = &pgdat->node_zones[zone_type]; - if (zone->present_pages) + if (zone->present_pages) { node_set_state(zone_to_nid(zone), N_NORMAL_MEMORY); + break; + } } #endif } @@ -5209,6 +5236,7 @@ void *__init alloc_large_system_hash(const char *tablename, max = ((unsigned long long)nr_all_pages << PAGE_SHIFT) >> 4; do_div(max, bucketsize); } + max = min(max, 0x80000000ULL); if (numentries > max) numentries = max; @@ -5386,7 +5414,25 @@ __count_immobile_pages(struct zone *zone, struct page *page, int count) bool is_pageblock_removable_nolock(struct page *page) { - struct zone *zone = page_zone(page); + struct zone *zone; + unsigned long pfn; + + /* + * We have to be careful here because we are iterating over memory + * sections which are not zone aware so we might end up outside of + * the zone but still within the section. + * We have to take care about the node as well. If the node is offline + * its NODE_DATA will be NULL - see page_zone. + */ + if (!node_online(page_to_nid(page))) + return false; + + zone = page_zone(page); + pfn = page_to_pfn(page); + if (zone->zone_start_pfn > pfn || + zone->zone_start_pfn + zone->spanned_pages <= pfn) + return false; + return __count_immobile_pages(zone, page, 0); } |