diff options
| -rw-r--r-- | include/linux/mmzone.h | 2 | ||||
| -rw-r--r-- | include/linux/page-isolation.h | 19 | ||||
| -rw-r--r-- | mm/compaction.c | 6 | ||||
| -rw-r--r-- | mm/page_alloc.c | 16 | ||||
| -rw-r--r-- | mm/vmstat.c | 2 |
5 files changed, 38 insertions, 7 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 73b64a38b984..4f4c8c26fa9d 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -57,7 +57,9 @@ enum { */ MIGRATE_CMA, #endif +#ifdef CONFIG_MEMORY_ISOLATION MIGRATE_ISOLATE, /* can't allocate from here */ +#endif MIGRATE_TYPES }; diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h index a92061e08d48..3fff8e774067 100644 --- a/include/linux/page-isolation.h +++ b/include/linux/page-isolation.h @@ -1,6 +1,25 @@ #ifndef __LINUX_PAGEISOLATION_H #define __LINUX_PAGEISOLATION_H +#ifdef CONFIG_MEMORY_ISOLATION +static inline bool is_migrate_isolate_page(struct page *page) +{ + return get_pageblock_migratetype(page) == MIGRATE_ISOLATE; +} +static inline bool is_migrate_isolate(int migratetype) +{ + return migratetype == MIGRATE_ISOLATE; +} +#else +static inline bool is_migrate_isolate_page(struct page *page) +{ + return false; +} +static inline bool is_migrate_isolate(int migratetype) +{ + return false; +} +#endif bool has_unmovable_pages(struct zone *zone, struct page *page, int count, bool skip_hwpoisoned_pages); diff --git a/mm/compaction.c b/mm/compaction.c index 5d5b0b259bc9..ef53f352b606 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -15,6 +15,7 @@ #include <linux/sysctl.h> #include <linux/sysfs.h> #include <linux/balloon_compaction.h> +#include <linux/page-isolation.h> #include "internal.h" #ifdef CONFIG_COMPACTION @@ -215,7 +216,10 @@ static bool suitable_migration_target(struct page *page) int migratetype = get_pageblock_migratetype(page); /* Don't interfere with memory hot-remove or the min_free_kbytes blocks */ - if (migratetype == MIGRATE_ISOLATE || migratetype == MIGRATE_RESERVE) + if (migratetype == MIGRATE_RESERVE) + return false; + + if (is_migrate_isolate(migratetype)) return false; /* If the page is a large free page, then allow migration */ diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 07fe78d01ffd..e3fb290194c0 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -673,7 +673,7 @@ static void free_pcppages_bulk(struct zone *zone, int count, /* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */ __free_one_page(page, zone, 0, mt); trace_mm_page_pcpu_drain(page, 0, mt); - if (likely(get_pageblock_migratetype(page) != MIGRATE_ISOLATE)) { + if (likely(!is_migrate_isolate_page(page))) { __mod_zone_page_state(zone, NR_FREE_PAGES, 1); if (is_migrate_cma(mt)) __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, 1); @@ -691,7 +691,7 @@ static void free_one_page(struct zone *zone, struct page *page, int order, zone->pages_scanned = 0; __free_one_page(page, zone, order, migratetype); - if (unlikely(migratetype != MIGRATE_ISOLATE)) + if (unlikely(!is_migrate_isolate(migratetype))) __mod_zone_freepage_state(zone, 1 << order, migratetype); spin_unlock(&zone->lock); } @@ -923,7 +923,9 @@ static int fallbacks[MIGRATE_TYPES][4] = { [MIGRATE_MOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE, MIGRATE_RESERVE }, #endif [MIGRATE_RESERVE] = { MIGRATE_RESERVE }, /* Never used */ +#ifdef CONFIG_MEMORY_ISOLATION [MIGRATE_ISOLATE] = { MIGRATE_RESERVE }, /* Never used */ +#endif }; /* @@ -1149,7 +1151,7 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order, list_add_tail(&page->lru, list); if (IS_ENABLED(CONFIG_CMA)) { mt = get_pageblock_migratetype(page); - if (!is_migrate_cma(mt) && mt != MIGRATE_ISOLATE) + if (!is_migrate_cma(mt) && !is_migrate_isolate(mt)) mt = migratetype; } set_freepage_migratetype(page, mt); @@ -1333,7 +1335,7 @@ void free_hot_cold_page(struct page *page, int cold) * excessively into the page allocator */ if (migratetype >= MIGRATE_PCPTYPES) { - if (unlikely(migratetype == MIGRATE_ISOLATE)) { + if (unlikely(is_migrate_isolate(migratetype))) { free_one_page(zone, page, 0, migratetype); goto out; } @@ -1407,7 +1409,7 @@ static int __isolate_free_page(struct page *page, unsigned int order) zone = page_zone(page); mt = get_pageblock_migratetype(page); - if (mt != MIGRATE_ISOLATE) { + if (!is_migrate_isolate(mt)) { /* Obey watermarks as if the page was being allocated */ watermark = low_wmark_pages(zone) + (1 << order); if (!zone_watermark_ok(zone, 0, watermark, 0, 0)) @@ -1426,7 +1428,7 @@ static 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 (mt != MIGRATE_ISOLATE && !is_migrate_cma(mt)) + if (!is_migrate_isolate(mt) && !is_migrate_cma(mt)) set_pageblock_migratetype(page, MIGRATE_MOVABLE); } @@ -2904,7 +2906,9 @@ static void show_migration_types(unsigned char type) #ifdef CONFIG_CMA [MIGRATE_CMA] = 'C', #endif +#ifdef CONFIG_MEMORY_ISOLATION [MIGRATE_ISOLATE] = 'I', +#endif }; char tmp[MIGRATE_TYPES + 1]; char *p = tmp; diff --git a/mm/vmstat.c b/mm/vmstat.c index e3475f5fd983..c9d1f68120cd 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -628,7 +628,9 @@ static char * const migratetype_names[MIGRATE_TYPES] = { #ifdef CONFIG_CMA "CMA", #endif +#ifdef CONFIG_MEMORY_ISOLATION "Isolate", +#endif }; static void *frag_start(struct seq_file *m, loff_t *pos) |