We need to account huge pages according to its size to get background
writaback work properly.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
fs/fs-writeback.c | 10 ++++---
include/linux/backing-dev.h | 10 +++++++
include/linux/memcontrol.h | 5 ++--
mm/migrate.c | 1 +
mm/page-writeback.c | 67 +++++++++++++++++++++++++++++----------------
5 files changed, 64 insertions(+), 29 deletions(-)
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 05713a5da083..2feb8677e69e 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -366,8 +366,9 @@ static void inode_switch_wbs_work_fn(struct work_struct *work)
struct page *page = radix_tree_deref_slot_protected(slot,
&mapping->tree_lock);
if (likely(page) && PageDirty(page)) {
- __dec_wb_stat(old_wb, WB_RECLAIMABLE);
- __inc_wb_stat(new_wb, WB_RECLAIMABLE);
+ int nr = hpage_nr_pages(page);
+ __add_wb_stat(old_wb, WB_RECLAIMABLE, -nr);
+ __add_wb_stat(new_wb, WB_RECLAIMABLE, nr);
}
}
@@ -376,9 +377,10 @@ static void inode_switch_wbs_work_fn(struct work_struct *work)
struct page *page = radix_tree_deref_slot_protected(slot,
&mapping->tree_lock);
if (likely(page)) {
+ int nr = hpage_nr_pages(page);
WARN_ON_ONCE(!PageWriteback(page));
- __dec_wb_stat(old_wb, WB_WRITEBACK);
- __inc_wb_stat(new_wb, WB_WRITEBACK);
+ __add_wb_stat(old_wb, WB_WRITEBACK, -nr);
+ __add_wb_stat(new_wb, WB_WRITEBACK, nr);
}
}
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 43b93a947e61..e63487f78824 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -61,6 +61,16 @@ static inline void __add_wb_stat(struct bdi_writeback *wb,
__percpu_counter_add(&wb->stat[item], amount, WB_STAT_BATCH);
}
+static inline void add_wb_stat(struct bdi_writeback *wb,
+ enum wb_stat_item item, s64 amount)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ __add_wb_stat(wb, item, amount);
+ local_irq_restore(flags);
+}
+
static inline void __inc_wb_stat(struct bdi_writeback *wb,
enum wb_stat_item item)
{
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 61d20c17f3b7..d24092581442 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -29,6 +29,7 @@
#include <linux/mmzone.h>
#include <linux/writeback.h>
#include <linux/page-flags.h>
+#include <linux/mm.h>
struct mem_cgroup;
struct page;
@@ -506,13 +507,13 @@ static inline void mem_cgroup_update_page_stat(struct page *page,
static inline void mem_cgroup_inc_page_stat(struct page *page,
enum mem_cgroup_stat_index idx)
{
- mem_cgroup_update_page_stat(page, idx, 1);
+ mem_cgroup_update_page_stat(page, idx, hpage_nr_pages(page));
}
static inline void mem_cgroup_dec_page_stat(struct page *page,
enum mem_cgroup_stat_index idx)
{
- mem_cgroup_update_page_stat(page, idx, -1);
+ mem_cgroup_update_page_stat(page, idx, -hpage_nr_pages(page));
}
unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
diff --git a/mm/migrate.c b/mm/migrate.c
index 99250aee1ac1..bfc722959d3e 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -505,6 +505,7 @@ int migrate_page_move_mapping(struct address_space *mapping,
* are mapped to swap space.
*/
if (newzone != oldzone) {
+ BUG_ON(PageTransHuge(page));
__dec_node_state(oldzone->zone_pgdat, NR_FILE_PAGES);
__inc_node_state(newzone->zone_pgdat, NR_FILE_PAGES);
if (PageSwapBacked(page) && !PageSwapCache(page)) {
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index c76fc90b7039..f903c09940c4 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2421,19 +2421,22 @@ void account_page_dirtied(struct page *page, struct address_space *mapping)
if (mapping_cap_account_dirty(mapping)) {
struct bdi_writeback *wb;
+ struct zone *zone = page_zone(page);
+ pg_data_t *pgdat = page_pgdat(page);
+ int nr = hpage_nr_pages(page);
inode_attach_wb(inode, page);
wb = inode_to_wb(inode);
mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_DIRTY);
- __inc_node_page_state(page, NR_FILE_DIRTY);
- __inc_zone_page_state(page, NR_ZONE_WRITE_PENDING);
- __inc_node_page_state(page, NR_DIRTIED);
- __inc_wb_stat(wb, WB_RECLAIMABLE);
- __inc_wb_stat(wb, WB_DIRTIED);
- task_io_account_write(PAGE_SIZE);
- current->nr_dirtied++;
- this_cpu_inc(bdp_ratelimits);
+ __mod_node_page_state(pgdat, NR_FILE_DIRTY, nr);
+ __mod_zone_page_state(zone, NR_ZONE_WRITE_PENDING, nr);
+ __mod_node_page_state(pgdat, NR_DIRTIED, nr);
+ __add_wb_stat(wb, WB_RECLAIMABLE, nr);
+ __add_wb_stat(wb, WB_DIRTIED, nr);
+ task_io_account_write(nr * PAGE_SIZE);
+ current->nr_dirtied += nr;
+ this_cpu_add(bdp_ratelimits, nr);
}
}
EXPORT_SYMBOL(account_page_dirtied);
@@ -2447,11 +2450,15 @@ void account_page_cleaned(struct page *page, struct address_space *mapping,
struct bdi_writeback *wb)
{
if (mapping_cap_account_dirty(mapping)) {
+ struct zone *zone = page_zone(page);
+ pg_data_t *pgdat = page_pgdat(page);
+ int nr = hpage_nr_pages(page);
+
mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_DIRTY);
- dec_node_page_state(page, NR_FILE_DIRTY);
- dec_zone_page_state(page, NR_ZONE_WRITE_PENDING);
- dec_wb_stat(wb, WB_RECLAIMABLE);
- task_io_account_cancelled_write(PAGE_SIZE);
+ mod_node_page_state(pgdat, NR_FILE_DIRTY, -nr);
+ mod_zone_page_state(zone, NR_ZONE_WRITE_PENDING, -nr);
+ add_wb_stat(wb, WB_RECLAIMABLE, -nr);
+ task_io_account_cancelled_write(PAGE_SIZE * nr);
}
}
@@ -2511,14 +2518,16 @@ void account_page_redirty(struct page *page)
struct address_space *mapping = page->mapping;
if (mapping && mapping_cap_account_dirty(mapping)) {
+ pg_data_t *pgdat = page_pgdat(page);
+ int nr = hpage_nr_pages(page);
struct inode *inode = mapping->host;
struct bdi_writeback *wb;
bool locked;
wb = unlocked_inode_to_wb_begin(inode, &locked);
- current->nr_dirtied--;
- dec_node_page_state(page, NR_DIRTIED);
- dec_wb_stat(wb, WB_DIRTIED);
+ current->nr_dirtied -= nr;
+ mod_node_page_state(pgdat, NR_DIRTIED, -nr);
+ add_wb_stat(wb, WB_DIRTIED, -nr);
unlocked_inode_to_wb_end(inode, locked);
}
}
@@ -2704,10 +2713,14 @@ int clear_page_dirty_for_io(struct page *page)
*/
wb = unlocked_inode_to_wb_begin(inode, &locked);
if (TestClearPageDirty(page)) {
+ struct zone *zone = page_zone(page);
+ pg_data_t *pgdat = page_pgdat(page);
+ int nr = hpage_nr_pages(page);
+
mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_DIRTY);
- dec_node_page_state(page, NR_FILE_DIRTY);
- dec_zone_page_state(page, NR_ZONE_WRITE_PENDING);
- dec_wb_stat(wb, WB_RECLAIMABLE);
+ mod_node_page_state(pgdat, NR_FILE_DIRTY, -nr);
+ mod_zone_page_state(zone, NR_ZONE_WRITE_PENDING, -nr);
+ add_wb_stat(wb, WB_RECLAIMABLE, -nr);
ret = 1;
}
unlocked_inode_to_wb_end(inode, locked);
@@ -2751,10 +2764,14 @@ int test_clear_page_writeback(struct page *page)
ret = TestClearPageWriteback(page);
}
if (ret) {
+ struct zone *zone = page_zone(page);
+ pg_data_t *pgdat = page_pgdat(page);
+ int nr = hpage_nr_pages(page);
+
mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_WRITEBACK);
- dec_node_page_state(page, NR_WRITEBACK);
- dec_zone_page_state(page, NR_ZONE_WRITE_PENDING);
- inc_node_page_state(page, NR_WRITTEN);
+ mod_node_page_state(pgdat, NR_WRITEBACK, -nr);
+ mod_zone_page_state(zone, NR_ZONE_WRITE_PENDING, -nr);
+ mod_node_page_state(pgdat, NR_WRITTEN, nr);
}
unlock_page_memcg(page);
return ret;
@@ -2806,9 +2823,13 @@ int __test_set_page_writeback(struct page *page, bool keep_write)
ret = TestSetPageWriteback(page);
}
if (!ret) {
+ struct zone *zone = page_zone(page);
+ pg_data_t *pgdat = page_pgdat(page);
+ int nr = hpage_nr_pages(page);
+
mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_WRITEBACK);
- inc_node_page_state(page, NR_WRITEBACK);
- inc_zone_page_state(page, NR_ZONE_WRITE_PENDING);
+ mod_node_page_state(pgdat, NR_WRITEBACK, nr);
+ mod_zone_page_state(zone, NR_ZONE_WRITE_PENDING, nr);
}
unlock_page_memcg(page);
return ret;
--
2.9.3
--
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