From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Now, all reserved pages for CMA region are belong to the ZONE_CMA and there is no other type of pages. Therefore, we don't need to use MIGRATE_CMA to distinguish and handle differently for CMA pages and ordinary pages. Remove MIGRATE_CMA. Unfortunately, this patch make free CMA counter incorrect because we count it when pages are on the MIGRATE_CMA. It will be fixed by next patch. I can squash next patch here but it makes changes complicated and hard to review so I separate that. Acked-by: Vlastimil Babka <vbabka@xxxxxxx> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> --- include/linux/gfp.h | 3 +- include/linux/mmzone.h | 24 ------------ include/linux/page-isolation.h | 5 +-- include/linux/vmstat.h | 8 ---- mm/cma.c | 2 +- mm/compaction.c | 10 +---- mm/hugetlb.c | 2 +- mm/memory_hotplug.c | 7 ++-- mm/page_alloc.c | 89 ++++++++++++------------------------------ mm/page_isolation.c | 15 +++---- mm/page_owner.c | 6 +-- mm/usercopy.c | 4 +- 12 files changed, 43 insertions(+), 132 deletions(-) diff --git a/include/linux/gfp.h b/include/linux/gfp.h index b86e0c2..815d756 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -553,8 +553,7 @@ static inline bool pm_suspended_storage(void) #if (defined(CONFIG_MEMORY_ISOLATION) && defined(CONFIG_COMPACTION)) || defined(CONFIG_CMA) /* The below functions must be run on a range from a single zone. */ -extern int alloc_contig_range(unsigned long start, unsigned long end, - unsigned migratetype); +extern int alloc_contig_range(unsigned long start, unsigned long end); extern void free_contig_range(unsigned long pfn, unsigned nr_pages); #endif diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 87b344e..24e46ca 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -41,22 +41,6 @@ enum { MIGRATE_RECLAIMABLE, MIGRATE_PCPTYPES, /* the number of types on the pcp lists */ MIGRATE_HIGHATOMIC = MIGRATE_PCPTYPES, -#ifdef CONFIG_CMA - /* - * MIGRATE_CMA migration type is designed to mimic the way - * ZONE_MOVABLE works. Only movable pages can be allocated - * from MIGRATE_CMA pageblocks and page allocator never - * implicitly change migration type of MIGRATE_CMA pageblock. - * - * The way to use it is to change migratetype of a range of - * pageblocks to MIGRATE_CMA which can be done by - * __free_pageblock_cma() function. What is important though - * is that a range of pageblocks must be aligned to - * MAX_ORDER_NR_PAGES should biggest page be bigger then - * a single pageblock. - */ - MIGRATE_CMA, -#endif #ifdef CONFIG_MEMORY_ISOLATION MIGRATE_ISOLATE, /* can't allocate from here */ #endif @@ -66,14 +50,6 @@ enum { /* In mm/page_alloc.c; keep in sync also with show_migration_types() there */ extern char * const migratetype_names[MIGRATE_TYPES]; -#ifdef CONFIG_CMA -# define is_migrate_cma(migratetype) unlikely((migratetype) == MIGRATE_CMA) -# define is_migrate_cma_page(_page) (get_pageblock_migratetype(_page) == MIGRATE_CMA) -#else -# define is_migrate_cma(migratetype) false -# define is_migrate_cma_page(_page) false -#endif - #define for_each_migratetype_order(order, type) \ for (order = 0; order < MAX_ORDER; order++) \ for (type = 0; type < MIGRATE_TYPES; type++) diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h index 047d647..1db9759 100644 --- a/include/linux/page-isolation.h +++ b/include/linux/page-isolation.h @@ -49,15 +49,14 @@ int move_freepages(struct zone *zone, */ int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, - unsigned migratetype, bool skip_hwpoisoned_pages); + bool skip_hwpoisoned_pages); /* * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE. * target range is [start_pfn, end_pfn) */ int -undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, - unsigned migratetype); +undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn); /* * Test all pages in [start_pfn, end_pfn) are isolated or not. diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index 6137719..ac6db88 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -341,14 +341,6 @@ static inline void drain_zonestat(struct zone *zone, struct per_cpu_pageset *pset) { } #endif /* CONFIG_SMP */ -static inline void __mod_zone_freepage_state(struct zone *zone, int nr_pages, - int migratetype) -{ - __mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages); - if (is_migrate_cma(migratetype)) - __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, nr_pages); -} - extern const char * const vmstat_text[]; #endif /* _LINUX_VMSTAT_H */ diff --git a/mm/cma.c b/mm/cma.c index d69bdf7..c1bae7f 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -450,7 +450,7 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align) pfn = cma->base_pfn + (bitmap_no << cma->order_per_bit); mutex_lock(&cma_mutex); - ret = alloc_contig_range(pfn, pfn + count, MIGRATE_CMA); + ret = alloc_contig_range(pfn, pfn + count); mutex_unlock(&cma_mutex); if (ret == 0) { page = pfn_to_page(pfn); diff --git a/mm/compaction.c b/mm/compaction.c index 4532905..9c5da79 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -90,7 +90,7 @@ static void map_pages(struct list_head *list) static inline bool migrate_async_suitable(int migratetype) { - return is_migrate_cma(migratetype) || migratetype == MIGRATE_MOVABLE; + return migratetype == MIGRATE_MOVABLE; } #ifdef CONFIG_COMPACTION @@ -1010,7 +1010,7 @@ static bool suitable_migration_target(struct page *page) return false; } - /* If the block is MIGRATE_MOVABLE or MIGRATE_CMA, allow migration */ + /* If the block is MIGRATE_MOVABLE, allow migration */ if (migrate_async_suitable(get_pageblock_migratetype(page))) return true; @@ -1331,12 +1331,6 @@ static enum compact_result __compact_finished(struct zone *zone, struct compact_ if (!list_empty(&area->free_list[migratetype])) return COMPACT_SUCCESS; -#ifdef CONFIG_CMA - /* MIGRATE_MOVABLE can fallback on MIGRATE_CMA */ - if (migratetype == MIGRATE_MOVABLE && - !list_empty(&area->free_list[MIGRATE_CMA])) - return COMPACT_SUCCESS; -#endif /* * Job done if allocation would steal freepages from * other migratetype buddy lists. diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 87e11d8..6735ad5 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1051,7 +1051,7 @@ static int __alloc_gigantic_page(unsigned long start_pfn, unsigned long nr_pages) { unsigned long end_pfn = start_pfn + nr_pages; - return alloc_contig_range(start_pfn, end_pfn, MIGRATE_MOVABLE); + return alloc_contig_range(start_pfn, end_pfn); } static bool pfn_range_valid_gigantic(struct zone *z, diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 6747dfe..0e438b1 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1889,8 +1889,7 @@ static int __ref __offline_pages(unsigned long start_pfn, return -EINVAL; /* set above range as isolated */ - ret = start_isolate_page_range(start_pfn, end_pfn, - MIGRATE_MOVABLE, true); + ret = start_isolate_page_range(start_pfn, end_pfn, true); if (ret) return ret; @@ -1958,7 +1957,7 @@ repeat: We cannot do rollback at this point. */ offline_isolated_pages(start_pfn, end_pfn); /* reset pagetype flags and makes migrate type to be MOVABLE */ - undo_isolate_page_range(start_pfn, end_pfn, MIGRATE_MOVABLE); + undo_isolate_page_range(start_pfn, end_pfn); /* removal success */ adjust_managed_page_count(pfn_to_page(start_pfn), -offlined_pages); zone->present_pages -= offlined_pages; @@ -1995,7 +1994,7 @@ failed_removal: ((unsigned long long) end_pfn << PAGE_SHIFT) - 1); memory_notify(MEM_CANCEL_OFFLINE, &arg); /* pushback to free area */ - undo_isolate_page_range(start_pfn, end_pfn, MIGRATE_MOVABLE); + undo_isolate_page_range(start_pfn, end_pfn); return ret; } diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 16ba1fe..ca17de9 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -131,8 +131,8 @@ gfp_t gfp_allowed_mask __read_mostly = GFP_BOOT_MASK; * put on a pcplist. Used to avoid the pageblock migratetype lookup when * freeing from pcplists in most cases, at the cost of possibly becoming stale. * Also the migratetype set in the page does not necessarily match the pcplist - * index, e.g. page might have MIGRATE_CMA set but be on a pcplist with any - * other index - this ensures that it will be put on the correct CMA freelist. + * index, e.g. page might have MIGRATE_MOVABLE set but be on a pcplist with any + * other index - this ensures that it will be put on the correct freelist. */ static inline int get_pcppage_migratetype(struct page *page) { @@ -242,9 +242,6 @@ char * const migratetype_names[MIGRATE_TYPES] = { "Movable", "Reclaimable", "HighAtomic", -#ifdef CONFIG_CMA - "CMA", -#endif #ifdef CONFIG_MEMORY_ISOLATION "Isolate", #endif @@ -676,7 +673,7 @@ static inline bool set_page_guard(struct zone *zone, struct page *page, INIT_LIST_HEAD(&page->lru); set_page_private(page, order); /* Guard pages are not available for any usage */ - __mod_zone_freepage_state(zone, -(1 << order), migratetype); + __mod_zone_page_state(zone, NR_FREE_PAGES, -(1 << order)); return true; } @@ -697,7 +694,7 @@ static inline void clear_page_guard(struct zone *zone, struct page *page, set_page_private(page, 0); if (!is_migrate_isolate(migratetype)) - __mod_zone_freepage_state(zone, (1 << order), migratetype); + __mod_zone_page_state(zone, NR_FREE_PAGES, (1 << order)); } #else struct page_ext_operations debug_guardpage_ops; @@ -808,7 +805,7 @@ static inline void __free_one_page(struct page *page, VM_BUG_ON(migratetype == -1); if (likely(!is_migrate_isolate(migratetype))) - __mod_zone_freepage_state(zone, 1 << order, migratetype); + __mod_zone_page_state(zone, NR_FREE_PAGES, 1 << order); page_idx = pfn & ((1 << MAX_ORDER) - 1); @@ -1618,7 +1615,7 @@ static void __init adjust_present_page_count(struct page *page, long count) zone->present_pages += count; } -/* Free whole pageblock and set its migration type to MIGRATE_CMA. */ +/* Free whole pageblock and set its migration type to MIGRATE_MOVABLE. */ void __init init_cma_reserved_pageblock(struct page *page) { unsigned i = pageblock_nr_pages; @@ -1643,7 +1640,7 @@ void __init init_cma_reserved_pageblock(struct page *page) adjust_present_page_count(page, pageblock_nr_pages); - set_pageblock_migratetype(page, MIGRATE_CMA); + set_pageblock_migratetype(page, MIGRATE_MOVABLE); if (pageblock_order >= MAX_ORDER) { i = pageblock_nr_pages; @@ -1870,25 +1867,11 @@ static int fallbacks[MIGRATE_TYPES][4] = { [MIGRATE_UNMOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_MOVABLE, MIGRATE_TYPES }, [MIGRATE_RECLAIMABLE] = { MIGRATE_UNMOVABLE, MIGRATE_MOVABLE, MIGRATE_TYPES }, [MIGRATE_MOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE, MIGRATE_TYPES }, -#ifdef CONFIG_CMA - [MIGRATE_CMA] = { MIGRATE_TYPES }, /* Never used */ -#endif #ifdef CONFIG_MEMORY_ISOLATION [MIGRATE_ISOLATE] = { MIGRATE_TYPES }, /* Never used */ #endif }; -#ifdef CONFIG_CMA -static struct page *__rmqueue_cma_fallback(struct zone *zone, - unsigned int order) -{ - return __rmqueue_smallest(zone, order, MIGRATE_CMA); -} -#else -static inline struct page *__rmqueue_cma_fallback(struct zone *zone, - unsigned int order) { return NULL; } -#endif - /* * Move the free pages in a range to the free lists of the requested type. * Note that start_page and end_pages are not aligned on a pageblock @@ -2093,7 +2076,7 @@ static void reserve_highatomic_pageblock(struct page *page, struct zone *zone, /* Yoink! */ mt = get_pageblock_migratetype(page); if (mt != MIGRATE_HIGHATOMIC && - !is_migrate_isolate(mt) && !is_migrate_cma(mt)) { + !is_migrate_isolate(mt)) { zone->nr_reserved_highatomic += pageblock_nr_pages; set_pageblock_migratetype(page, MIGRATE_HIGHATOMIC); move_freepages_block(zone, page, MIGRATE_HIGHATOMIC); @@ -2196,9 +2179,7 @@ __rmqueue_fallback(struct zone *zone, unsigned int order, int start_migratetype) /* * The pcppage_migratetype may differ from pageblock's * migratetype depending on the decisions in - * find_suitable_fallback(). This is OK as long as it does not - * differ for MIGRATE_CMA pageblocks. Those can be used as - * fallback only via special __rmqueue_cma_fallback() function + * find_suitable_fallback(). This is OK. */ set_pcppage_migratetype(page, start_migratetype); @@ -2221,13 +2202,8 @@ static struct page *__rmqueue(struct zone *zone, unsigned int order, struct page *page; page = __rmqueue_smallest(zone, order, migratetype); - if (unlikely(!page)) { - if (migratetype == MIGRATE_MOVABLE) - page = __rmqueue_cma_fallback(zone, order); - - if (!page) - page = __rmqueue_fallback(zone, order, migratetype); - } + if (unlikely(!page)) + page = __rmqueue_fallback(zone, order, migratetype); trace_mm_page_alloc_zone_locked(page, order, migratetype); return page; @@ -2267,9 +2243,6 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order, else list_add_tail(&page->lru, list); list = &page->lru; - if (is_migrate_cma(get_pcppage_migratetype(page))) - __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, - -(1 << order)); } __mod_zone_page_state(zone, NR_FREE_PAGES, -(i << order)); spin_unlock(&zone->lock); @@ -2568,7 +2541,7 @@ int __isolate_free_page(struct page *page, unsigned int order) if (!zone_watermark_ok(zone, 0, watermark, 0, 0)) return 0; - __mod_zone_freepage_state(zone, -(1UL << order), mt); + __mod_zone_page_state(zone, NR_FREE_PAGES, -(1UL << order)); } /* Remove page from free list */ @@ -2584,7 +2557,7 @@ int __isolate_free_page(struct page *page, unsigned int order) struct page *endpage = page + (1 << order) - 1; for (; page < endpage; page += pageblock_nr_pages) { int mt = get_pageblock_migratetype(page); - if (!is_migrate_isolate(mt) && !is_migrate_cma(mt)) + if (!is_migrate_isolate(mt)) set_pageblock_migratetype(page, MIGRATE_MOVABLE); } @@ -2684,8 +2657,8 @@ struct page *buffered_rmqueue(struct zone *preferred_zone, spin_unlock(&zone->lock); if (!page) goto failed; - __mod_zone_freepage_state(zone, -(1 << order), - get_pcppage_migratetype(page)); + + __mod_zone_page_state(zone, NR_FREE_PAGES, -(1 << order)); } __count_zid_vm_events(PGALLOC, page_zonenum(page), 1 << order); @@ -2835,11 +2808,6 @@ bool __zone_watermark_ok(struct zone *z, unsigned int order, unsigned long mark, if (!list_empty(&area->free_list[mt])) return true; } - -#ifdef CONFIG_CMA - if (!list_empty(&area->free_list[MIGRATE_CMA])) - return true; -#endif } return false; } @@ -4173,9 +4141,6 @@ static void show_migration_types(unsigned char type) [MIGRATE_MOVABLE] = 'M', [MIGRATE_RECLAIMABLE] = 'E', [MIGRATE_HIGHATOMIC] = 'H', -#ifdef CONFIG_CMA - [MIGRATE_CMA] = 'C', -#endif #ifdef CONFIG_MEMORY_ISOLATION [MIGRATE_ISOLATE] = 'I', #endif @@ -7130,7 +7095,7 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count, return false; mt = get_pageblock_migratetype(page); - if (mt == MIGRATE_MOVABLE || is_migrate_cma(mt)) + if (mt == MIGRATE_MOVABLE) return false; pfn = page_to_pfn(page); @@ -7278,15 +7243,11 @@ static int __alloc_contig_migrate_range(struct compact_control *cc, * alloc_contig_range() -- tries to allocate given range of pages * @start: start PFN to allocate * @end: one-past-the-last PFN to allocate - * @migratetype: migratetype of the underlaying pageblocks (either - * #MIGRATE_MOVABLE or #MIGRATE_CMA). All pageblocks - * in range must have the same migratetype and it must - * be either of the two. * * The PFN range does not have to be pageblock or MAX_ORDER_NR_PAGES * aligned, however it's the caller's responsibility to guarantee that * we are the only thread that changes migrate type of pageblocks the - * pages fall in. + * pages fall in and it should be MIGRATE_MOVABLE. * * The PFN range must belong to a single zone. * @@ -7294,8 +7255,7 @@ static int __alloc_contig_migrate_range(struct compact_control *cc, * pages which PFN is in [start, end) are allocated for the caller and * need to be freed with free_contig_range(). */ -int alloc_contig_range(unsigned long start, unsigned long end, - unsigned migratetype) +int alloc_contig_range(unsigned long start, unsigned long end) { unsigned long outer_start, outer_end; unsigned int order; @@ -7328,15 +7288,14 @@ int alloc_contig_range(unsigned long start, unsigned long end, * allocator removing them from the buddy system. This way * page allocator will never consider using them. * - * This lets us mark the pageblocks back as - * MIGRATE_CMA/MIGRATE_MOVABLE so that free pages in the - * aligned range but not in the unaligned, original range are - * put back to page allocator so that buddy can use them. + * This lets us mark the pageblocks back as MIGRATE_MOVABLE + * so that free pages in the aligned range but not in the + * unaligned, original range are put back to page allocator + * so that buddy can use them. */ ret = start_isolate_page_range(pfn_max_align_down(start), - pfn_max_align_up(end), migratetype, - false); + pfn_max_align_up(end), false); if (ret) return ret; @@ -7414,7 +7373,7 @@ int alloc_contig_range(unsigned long start, unsigned long end, done: undo_isolate_page_range(pfn_max_align_down(start), - pfn_max_align_up(end), migratetype); + pfn_max_align_up(end)); return ret; } diff --git a/mm/page_isolation.c b/mm/page_isolation.c index 064b7fb..e7933ff 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -62,13 +62,12 @@ static int set_migratetype_isolate(struct page *page, out: if (!ret) { unsigned long nr_pages; - int migratetype = get_pageblock_migratetype(page); set_pageblock_migratetype(page, MIGRATE_ISOLATE); zone->nr_isolate_pageblock++; nr_pages = move_freepages_block(zone, page, MIGRATE_ISOLATE); - __mod_zone_freepage_state(zone, -nr_pages, migratetype); + __mod_zone_page_state(zone, NR_FREE_PAGES, -nr_pages); } spin_unlock_irqrestore(&zone->lock, flags); @@ -121,7 +120,7 @@ static void unset_migratetype_isolate(struct page *page, unsigned migratetype) */ if (!isolated_page) { nr_pages = move_freepages_block(zone, page, migratetype); - __mod_zone_freepage_state(zone, nr_pages, migratetype); + __mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages); } set_pageblock_migratetype(page, migratetype); zone->nr_isolate_pageblock--; @@ -150,7 +149,6 @@ __first_valid_page(unsigned long pfn, unsigned long nr_pages) * to be MIGRATE_ISOLATE. * @start_pfn: The lower PFN of the range to be isolated. * @end_pfn: The upper PFN of the range to be isolated. - * @migratetype: migrate type to set in error recovery. * * Making page-allocation-type to be MIGRATE_ISOLATE means free pages in * the range will never be allocated. Any free pages and pages freed in the @@ -160,7 +158,7 @@ __first_valid_page(unsigned long pfn, unsigned long nr_pages) * Returns 0 on success and -EBUSY if any part of range cannot be isolated. */ int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, - unsigned migratetype, bool skip_hwpoisoned_pages) + bool skip_hwpoisoned_pages) { unsigned long pfn; unsigned long undo_pfn; @@ -184,7 +182,7 @@ undo: for (pfn = start_pfn; pfn < undo_pfn; pfn += pageblock_nr_pages) - unset_migratetype_isolate(pfn_to_page(pfn), migratetype); + unset_migratetype_isolate(pfn_to_page(pfn), MIGRATE_MOVABLE); return -EBUSY; } @@ -192,8 +190,7 @@ undo: /* * Make isolated pages available again. */ -int undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, - unsigned migratetype) +int undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn) { unsigned long pfn; struct page *page; @@ -207,7 +204,7 @@ int undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, page = __first_valid_page(pfn, pageblock_nr_pages); if (!page || get_pageblock_migratetype(page) != MIGRATE_ISOLATE) continue; - unset_migratetype_isolate(page, migratetype); + unset_migratetype_isolate(page, MIGRATE_MOVABLE); } return 0; } diff --git a/mm/page_owner.c b/mm/page_owner.c index c3cee24..4016815 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -299,11 +299,7 @@ void pagetypeinfo_showmixedcount_print(struct seq_file *m, page_mt = gfpflags_to_migratetype( page_owner->gfp_mask); if (pageblock_mt != page_mt) { - if (is_migrate_cma(pageblock_mt)) - count[MIGRATE_MOVABLE]++; - else - count[pageblock_mt]++; - + count[pageblock_mt]++; pfn = block_end_pfn; break; } diff --git a/mm/usercopy.c b/mm/usercopy.c index a3cc305..f7682d9 100644 --- a/mm/usercopy.c +++ b/mm/usercopy.c @@ -197,7 +197,7 @@ static inline const char *check_heap_object(const void *ptr, unsigned long n, * several independently allocated pages. */ is_reserved = PageReserved(page); - is_cma = is_migrate_cma_page(page); + is_cma = is_zone_cma(page_zone(page)); if (!is_reserved && !is_cma) goto reject; @@ -205,7 +205,7 @@ static inline const char *check_heap_object(const void *ptr, unsigned long n, page = virt_to_head_page(ptr); if (is_reserved && !PageReserved(page)) goto reject; - if (is_cma && !is_migrate_cma_page(page)) + if (is_cma && !is_zone_cma(page_zone(page))) goto reject; } -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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