Commit d1ce749a authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz Committed by Linus Torvalds

cma: count free CMA pages

Add NR_FREE_CMA_PAGES counter to be later used for checking watermark in
__zone_watermark_ok().  For simplicity and to avoid #ifdef hell make this
counter always available (not only when CONFIG_CMA=y).

[akpm@linux-foundation.org: use conventional migratetype naming]
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2139cbe6
......@@ -142,6 +142,7 @@ enum zone_stat_item {
NUMA_OTHER, /* allocation from other node */
#endif
NR_ANON_TRANSPARENT_HUGEPAGES,
NR_FREE_CMA_PAGES,
NR_VM_ZONE_STAT_ITEMS };
/*
......
......@@ -253,6 +253,14 @@ static inline void refresh_zone_stat_thresholds(void) { }
#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 */
......@@ -558,7 +558,8 @@ static inline void __free_one_page(struct page *page,
if (page_is_guard(buddy)) {
clear_page_guard_flag(buddy);
set_page_private(page, 0);
__mod_zone_page_state(zone, NR_FREE_PAGES, 1 << order);
__mod_zone_freepage_state(zone, 1 << order,
migratetype);
} else {
list_del(&buddy->lru);
zone->free_area[order].nr_free--;
......@@ -677,6 +678,8 @@ 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 (is_migrate_cma(mt))
__mod_zone_page_state(zone, NR_FREE_CMA_PAGES, 1);
} while (--to_free && --batch_free && !list_empty(list));
}
__mod_zone_page_state(zone, NR_FREE_PAGES, count);
......@@ -692,7 +695,7 @@ static void free_one_page(struct zone *zone, struct page *page, int order,
__free_one_page(page, zone, order, migratetype);
if (unlikely(migratetype != MIGRATE_ISOLATE))
__mod_zone_page_state(zone, NR_FREE_PAGES, 1 << order);
__mod_zone_freepage_state(zone, 1 << order, migratetype);
spin_unlock(&zone->lock);
}
......@@ -815,7 +818,8 @@ static inline void expand(struct zone *zone, struct page *page,
set_page_guard_flag(&page[size]);
set_page_private(&page[size], high);
/* Guard pages are not available for any usage */
__mod_zone_page_state(zone, NR_FREE_PAGES, -(1 << high));
__mod_zone_freepage_state(zone, -(1 << high),
migratetype);
continue;
}
#endif
......@@ -1141,6 +1145,9 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
}
set_page_private(page, mt);
list = &page->lru;
if (is_migrate_cma(mt))
__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);
......@@ -1412,7 +1419,7 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
mt = get_pageblock_migratetype(page);
if (unlikely(mt != MIGRATE_ISOLATE))
__mod_zone_page_state(zone, NR_FREE_PAGES, -(1UL << order));
__mod_zone_freepage_state(zone, -(1UL << order), mt);
if (alloc_order != order)
expand(zone, page, alloc_order, order,
......@@ -1516,7 +1523,8 @@ struct page *buffered_rmqueue(struct zone *preferred_zone,
spin_unlock(&zone->lock);
if (!page)
goto failed;
__mod_zone_page_state(zone, NR_FREE_PAGES, -(1 << order));
__mod_zone_freepage_state(zone, -(1 << order),
get_pageblock_migratetype(page));
}
__count_zone_vm_events(PGALLOC, zone, 1 << order);
......@@ -2890,7 +2898,8 @@ void show_free_areas(unsigned int filter)
" unevictable:%lu"
" dirty:%lu writeback:%lu unstable:%lu\n"
" free:%lu slab_reclaimable:%lu slab_unreclaimable:%lu\n"
" mapped:%lu shmem:%lu pagetables:%lu bounce:%lu\n",
" mapped:%lu shmem:%lu pagetables:%lu bounce:%lu\n"
" free_cma:%lu\n",
global_page_state(NR_ACTIVE_ANON),
global_page_state(NR_INACTIVE_ANON),
global_page_state(NR_ISOLATED_ANON),
......@@ -2907,7 +2916,8 @@ void show_free_areas(unsigned int filter)
global_page_state(NR_FILE_MAPPED),
global_page_state(NR_SHMEM),
global_page_state(NR_PAGETABLE),
global_page_state(NR_BOUNCE));
global_page_state(NR_BOUNCE),
global_page_state(NR_FREE_CMA_PAGES));
for_each_populated_zone(zone) {
int i;
......@@ -2939,6 +2949,7 @@ void show_free_areas(unsigned int filter)
" pagetables:%lukB"
" unstable:%lukB"
" bounce:%lukB"
" free_cma:%lukB"
" writeback_tmp:%lukB"
" pages_scanned:%lu"
" all_unreclaimable? %s"
......@@ -2968,6 +2979,7 @@ void show_free_areas(unsigned int filter)
K(zone_page_state(zone, NR_PAGETABLE)),
K(zone_page_state(zone, NR_UNSTABLE_NFS)),
K(zone_page_state(zone, NR_BOUNCE)),
K(zone_page_state(zone, NR_FREE_CMA_PAGES)),
K(zone_page_state(zone, NR_WRITEBACK_TEMP)),
zone->pages_scanned,
(zone->all_unreclaimable ? "yes" : "no")
......
......@@ -77,11 +77,12 @@ int set_migratetype_isolate(struct page *page)
out:
if (!ret) {
unsigned long nr_pages;
int migratetype = get_pageblock_migratetype(page);
set_pageblock_isolate(page);
nr_pages = move_freepages_block(zone, page, MIGRATE_ISOLATE);
__mod_zone_page_state(zone, NR_FREE_PAGES, -nr_pages);
__mod_zone_freepage_state(zone, -nr_pages, migratetype);
}
spin_unlock_irqrestore(&zone->lock, flags);
......@@ -100,7 +101,7 @@ void unset_migratetype_isolate(struct page *page, unsigned migratetype)
if (get_pageblock_migratetype(page) != MIGRATE_ISOLATE)
goto out;
nr_pages = move_freepages_block(zone, page, migratetype);
__mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages);
__mod_zone_freepage_state(zone, nr_pages, migratetype);
restore_pageblock_isolate(page, migratetype);
out:
spin_unlock_irqrestore(&zone->lock, flags);
......
......@@ -722,6 +722,7 @@ const char * const vmstat_text[] = {
"numa_other",
#endif
"nr_anon_transparent_hugepages",
"nr_free_cma",
"nr_dirty_threshold",
"nr_dirty_background_threshold",
......
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