diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 89 |
1 files changed, 78 insertions, 11 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 7945247b1e5..8e5726ab0d8 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -53,6 +53,7 @@ #include <linux/compaction.h> #include <trace/events/kmem.h> #include <linux/ftrace_event.h> +#include <linux/memcontrol.h> #include <asm/tlbflush.h> #include <asm/div64.h> @@ -565,7 +566,8 @@ static inline int free_pages_check(struct page *page) if (unlikely(page_mapcount(page) | (page->mapping != NULL) | (atomic_read(&page->_count) != 0) | - (page->flags & PAGE_FLAGS_CHECK_AT_FREE))) { + (page->flags & PAGE_FLAGS_CHECK_AT_FREE) | + (mem_cgroup_bad_page_check(page)))) { bad_page(page); return 1; } @@ -614,6 +616,10 @@ static void free_pcppages_bulk(struct zone *zone, int count, list = &pcp->lists[migratetype]; } while (list_empty(list)); + /* This is the only non-empty list. Free them all. */ + if (batch_free == MIGRATE_PCPTYPES) + batch_free = to_free; + do { page = list_entry(list->prev, struct page, lru); /* must delete as __free_one_page list manipulates */ @@ -750,7 +756,8 @@ static inline int check_new_page(struct page *page) if (unlikely(page_mapcount(page) | (page->mapping != NULL) | (atomic_read(&page->_count) != 0) | - (page->flags & PAGE_FLAGS_CHECK_AT_PREP))) { + (page->flags & PAGE_FLAGS_CHECK_AT_PREP) | + (mem_cgroup_bad_page_check(page)))) { bad_page(page); return 1; } @@ -863,9 +870,8 @@ static int move_freepages(struct zone *zone, } order = page_order(page); - list_del(&page->lru); - list_add(&page->lru, - &zone->free_area[order].free_list[migratetype]); + list_move(&page->lru, + &zone->free_area[order].free_list[migratetype]); page += 1 << order; pages_moved += 1 << order; } @@ -1333,7 +1339,7 @@ again: } __count_zone_vm_events(PGALLOC, zone, 1 << order); - zone_statistics(preferred_zone, zone); + zone_statistics(preferred_zone, zone, gfp_flags); local_irq_restore(flags); VM_BUG_ON(bad_range(zone, page)); @@ -1714,6 +1720,20 @@ try_next_zone: return page; } +/* + * Large machines with many possible nodes should not always dump per-node + * meminfo in irq context. + */ +static inline bool should_suppress_show_mem(void) +{ + bool ret = false; + +#if NODES_SHIFT > 8 + ret = in_interrupt(); +#endif + return ret; +} + static inline int should_alloc_retry(gfp_t gfp_mask, unsigned int order, unsigned long pages_reclaimed) @@ -2085,7 +2105,7 @@ rebalance: sync_migration); if (page) goto got_pg; - sync_migration = true; + sync_migration = !(gfp_mask & __GFP_NO_KSWAPD); /* Try direct reclaim and then allocating */ page = __alloc_pages_direct_reclaim(gfp_mask, order, @@ -2157,11 +2177,25 @@ rebalance: nopage: if (!(gfp_mask & __GFP_NOWARN) && printk_ratelimit()) { - printk(KERN_WARNING "%s: page allocation failure." - " order:%d, mode:0x%x\n", + unsigned int filter = SHOW_MEM_FILTER_NODES; + + /* + * This documents exceptions given to allocations in certain + * contexts that are allowed to allocate outside current's set + * of allowed nodes. + */ + if (!(gfp_mask & __GFP_NOMEMALLOC)) + if (test_thread_flag(TIF_MEMDIE) || + (current->flags & (PF_MEMALLOC | PF_EXITING))) + filter &= ~SHOW_MEM_FILTER_NODES; + if (in_interrupt() || !wait) + filter &= ~SHOW_MEM_FILTER_NODES; + + pr_warning("%s: page allocation failure. order:%d, mode:0x%x\n", current->comm, order, gfp_mask); dump_stack(); - show_mem(); + if (!should_suppress_show_mem()) + __show_mem(filter); } return page; got_pg: @@ -2411,19 +2445,42 @@ void si_meminfo_node(struct sysinfo *val, int nid) } #endif +/* + * Determine whether the zone's node should be displayed or not, depending on + * whether SHOW_MEM_FILTER_NODES was passed to __show_free_areas(). + */ +static bool skip_free_areas_zone(unsigned int flags, const struct zone *zone) +{ + bool ret = false; + + if (!(flags & SHOW_MEM_FILTER_NODES)) + goto out; + + get_mems_allowed(); + ret = !node_isset(zone->zone_pgdat->node_id, + cpuset_current_mems_allowed); + put_mems_allowed(); +out: + return ret; +} + #define K(x) ((x) << (PAGE_SHIFT-10)) /* * Show free area list (used inside shift_scroll-lock stuff) * We also calculate the percentage fragmentation. We do this by counting the * memory on each free list with the exception of the first item on the list. + * Suppresses nodes that are not allowed by current's cpuset if + * SHOW_MEM_FILTER_NODES is passed. */ -void show_free_areas(void) +void __show_free_areas(unsigned int filter) { int cpu; struct zone *zone; for_each_populated_zone(zone) { + if (skip_free_areas_zone(filter, zone)) + continue; show_node(zone); printk("%s per-cpu:\n", zone->name); @@ -2465,6 +2522,8 @@ void show_free_areas(void) for_each_populated_zone(zone) { int i; + if (skip_free_areas_zone(filter, zone)) + continue; show_node(zone); printk("%s" " free:%lukB" @@ -2532,6 +2591,8 @@ void show_free_areas(void) for_each_populated_zone(zone) { unsigned long nr[MAX_ORDER], flags, order, total = 0; + if (skip_free_areas_zone(filter, zone)) + continue; show_node(zone); printk("%s: ", zone->name); @@ -2551,6 +2612,11 @@ void show_free_areas(void) show_swap_cache_info(); } +void show_free_areas(void) +{ + __show_free_areas(0); +} + static void zoneref_set_zone(struct zone *zone, struct zoneref *zoneref) { zoneref->zone = zone; @@ -5621,4 +5687,5 @@ void dump_page(struct page *page) page, atomic_read(&page->_count), page_mapcount(page), page->mapping, page->index); dump_page_flags(page->flags); + mem_cgroup_print_bad_page(page); } |