diff options
| -rw-r--r-- | include/linux/mmzone.h | 9 | ||||
| -rw-r--r-- | init/Kconfig | 13 | ||||
| -rw-r--r-- | mm/page_alloc.c | 42 |
3 files changed, 2 insertions, 62 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index afdec811745..09b2c4f50e3 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -33,21 +33,12 @@ */ #define PAGE_ALLOC_COSTLY_ORDER 3 -#ifdef CONFIG_PAGE_GROUP_BY_MOBILITY #define MIGRATE_UNMOVABLE 0 #define MIGRATE_RECLAIMABLE 1 #define MIGRATE_MOVABLE 2 #define MIGRATE_HIGHATOMIC 3 #define MIGRATE_RESERVE 4 #define MIGRATE_TYPES 5 -#else -#define MIGRATE_UNMOVABLE 0 -#define MIGRATE_UNRECLAIMABLE 0 -#define MIGRATE_MOVABLE 0 -#define MIGRATE_HIGHATOMIC 0 -#define MIGRATE_RESERVE 0 -#define MIGRATE_TYPES 1 -#endif #define for_each_migratetype_order(order, type) \ for (order = 0; order < MAX_ORDER; order++) \ diff --git a/init/Kconfig b/init/Kconfig index bab643f7717..54f31a191b8 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -607,19 +607,6 @@ config BASE_SMALL default 0 if BASE_FULL default 1 if !BASE_FULL -config PAGE_GROUP_BY_MOBILITY - bool "Group pages based on their mobility in the page allocator" - def_bool y - help - The standard allocator will fragment memory over time which means - that high order allocations will fail even if kswapd is running. If - this option is set, the allocator will try and group page types - based on their ability to migrate or reclaim. This is a best effort - attempt at lowering fragmentation which a few workloads care about. - The loss is a more complex allocator that may perform slower. If - you are interested in working with large pages, say Y and set - /proc/sys/vm/min_free_bytes to 16374. Otherwise say N - menuconfig MODULES bool "Enable loadable module support" help diff --git a/mm/page_alloc.c b/mm/page_alloc.c index f7873a47fa8..8aec4d4601e 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -158,7 +158,6 @@ int nr_node_ids __read_mostly = MAX_NUMNODES; EXPORT_SYMBOL(nr_node_ids); #endif -#ifdef CONFIG_PAGE_GROUP_BY_MOBILITY int page_group_by_mobility_disabled __read_mostly; static inline int get_pageblock_migratetype(struct page *page) @@ -192,22 +191,6 @@ static inline int allocflags_to_migratetype(gfp_t gfp_flags, int order) ((gfp_flags & __GFP_RECLAIMABLE) != 0); } -#else -static inline int get_pageblock_migratetype(struct page *page) -{ - return MIGRATE_UNMOVABLE; -} - -static void set_pageblock_migratetype(struct page *page, int migratetype) -{ -} - -static inline int allocflags_to_migratetype(gfp_t gfp_flags, int order) -{ - return MIGRATE_UNMOVABLE; -} -#endif /* CONFIG_PAGE_GROUP_BY_MOBILITY */ - #ifdef CONFIG_DEBUG_VM static int page_outside_zone_boundaries(struct zone *zone, struct page *page) { @@ -718,7 +701,6 @@ static struct page *__rmqueue_smallest(struct zone *zone, unsigned int order, } -#ifdef CONFIG_PAGE_GROUP_BY_MOBILITY /* * This array describes the order lists are fallen back to when * the free lists for the desirable migrate type are depleted @@ -750,7 +732,7 @@ int move_freepages(struct zone *zone, * CONFIG_HOLES_IN_ZONE is set. This bug check is probably redundant * anyway as we check zone boundaries in move_freepages_block(). * Remove at a later date when no bug reports exist related to - * CONFIG_PAGE_GROUP_BY_MOBILITY + * grouping pages by mobility */ BUG_ON(page_zone(start_page) != page_zone(end_page)); #endif @@ -899,13 +881,6 @@ retry: /* Use MIGRATE_RESERVE rather than fail an allocation */ return __rmqueue_smallest(zone, order, MIGRATE_RESERVE); } -#else -static struct page *__rmqueue_fallback(struct zone *zone, int order, - int start_migratetype) -{ - return NULL; -} -#endif /* CONFIG_PAGE_GROUP_BY_MOBILITY */ /* * Do the hard work of removing an element from the buddy allocator. @@ -1033,7 +1008,6 @@ void mark_free_pages(struct zone *zone) } #endif /* CONFIG_PM */ -#if defined(CONFIG_HIBERNATION) || defined(CONFIG_PAGE_GROUP_BY_MOBILITY) /* * Spill all of this CPU's per-cpu pages back into the buddy allocator. */ @@ -1064,9 +1038,6 @@ void drain_all_local_pages(void) smp_call_function(smp_drain_local_pages, NULL, 0, 1); } -#else -void drain_all_local_pages(void) {} -#endif /* CONFIG_HIBERNATION || CONFIG_PAGE_GROUP_BY_MOBILITY */ /* * Free a 0-order page @@ -1157,7 +1128,6 @@ again: goto failed; } -#ifdef CONFIG_PAGE_GROUP_BY_MOBILITY /* Find a page of the appropriate migrate type */ list_for_each_entry(page, &pcp->list, lru) if (page_private(page) == migratetype) @@ -1169,9 +1139,6 @@ again: pcp->batch, &pcp->list, migratetype); page = list_entry(pcp->list.next, struct page, lru); } -#else - page = list_entry(pcp->list.next, struct page, lru); -#endif /* CONFIG_PAGE_GROUP_BY_MOBILITY */ list_del(&page->lru); pcp->count--; @@ -2525,7 +2492,6 @@ static inline unsigned long wait_table_bits(unsigned long size) #define LONG_ALIGN(x) (((x)+(sizeof(long))-1)&~((sizeof(long))-1)) -#ifdef CONFIG_PAGE_GROUP_BY_MOBILITY /* * Mark a number of MAX_ORDER_NR_PAGES blocks as MIGRATE_RESERVE. The number * of blocks reserved is based on zone->pages_min. The memory within the @@ -2579,11 +2545,7 @@ static void setup_zone_migrate_reserve(struct zone *zone) } } } -#else -static inline void setup_zone_migrate_reserve(struct zone *zone) -{ -} -#endif /* CONFIG_PAGE_GROUP_BY_MOBILITY */ + /* * Initially all pages are reserved - free ones are freed * up by free_all_bootmem() once the early boot process is |