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).
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: Michal Nazarewicz <mina86@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
include/linux/mmzone.h | 1 +
include/linux/vmstat.h | 8 ++++++++
mm/page_alloc.c | 26 +++++++++++++++++++-------
mm/page_isolation.c | 5 +++--
mm/vmstat.c | 1 +
5 files changed, 32 insertions(+), 9 deletions(-)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index ca034a1..904889d 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -140,6 +140,7 @@ enum zone_stat_item {
NUMA_OTHER, /* allocation from other node */
#endif
NR_ANON_TRANSPARENT_HUGEPAGES,
+ NR_FREE_CMA_PAGES,
NR_VM_ZONE_STAT_ITEMS };
/*
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index ad2cfd5..a5bb150 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -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 */
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6a59e42..287f79d 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -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);
@@ -1419,7 +1426,7 @@ int split_free_page(struct page *page, bool check_wmark)
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);
/* Split into individual pages */
set_page_refcounted(page);
@@ -1494,7 +1501,8 @@ again:
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);
@@ -2862,7 +2870,8 @@ 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),
@@ -2879,7 +2888,8 @@ 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;
@@ -2911,6 +2921,7 @@ 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"
@@ -2940,6 +2951,7 @@ 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")
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 3ca1716..bce97c9 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -77,11 +77,12 @@ int set_migratetype_isolate(struct page *page)
out:
if (!ret) {
unsigned long nr_pages;
+ int mt = 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, mt);
}
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);
diff --git a/mm/vmstat.c b/mm/vmstat.c
index df7a674..7c102e6 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -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",
--
1.7.11.3
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