diff mbox series

[1/4] mm: Move recent_rotated pages calculation to shrink_inactive_list()

Message ID 154998444053.18704.14821278988281142015.stgit@localhost.localdomain (mailing list archive)
State New, archived
Headers show
Series mm: Generalize putback functions | expand

Commit Message

Kirill Tkhai Feb. 12, 2019, 3:14 p.m. UTC 
Currently, struct reclaim_stat::nr_activate is a local variable,
used only in shrink_page_list(). This patch introduces another
local variable pgactivate to use instead of it, and reuses
nr_activate to account number of active pages.

Note, that we need nr_activate to be an array, since type of page
may change during shrink_page_list() (see ClearPageSwapBacked()).

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
---
 include/linux/vmstat.h |    2 +-
 mm/vmscan.c            |   15 +++++++--------
 2 files changed, 8 insertions(+), 9 deletions(-)

Comments

Daniel Jordan Feb. 13, 2019, 5:33 p.m. UTC | #1 
On Tue, Feb 12, 2019 at 06:14:00PM +0300, Kirill Tkhai wrote:
> Currently, struct reclaim_stat::nr_activate is a local variable,
> used only in shrink_page_list(). This patch introduces another
> local variable pgactivate to use instead of it, and reuses
> nr_activate to account number of active pages.
> 
> Note, that we need nr_activate to be an array, since type of page
> may change during shrink_page_list() (see ClearPageSwapBacked()).
> 
> Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
> ---
>  include/linux/vmstat.h |    2 +-
>  mm/vmscan.c            |   15 +++++++--------

include/trace/events/vmscan.h needs to account for the array-ification of
nr_activate too.
Kirill Tkhai Feb. 14, 2019, 10:19 a.m. UTC | #2 
On 13.02.2019 20:33, Daniel Jordan wrote:
> On Tue, Feb 12, 2019 at 06:14:00PM +0300, Kirill Tkhai wrote:
>> Currently, struct reclaim_stat::nr_activate is a local variable,
>> used only in shrink_page_list(). This patch introduces another
>> local variable pgactivate to use instead of it, and reuses
>> nr_activate to account number of active pages.
>>
>> Note, that we need nr_activate to be an array, since type of page
>> may change during shrink_page_list() (see ClearPageSwapBacked()).
>>
>> Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
>> ---
>>  include/linux/vmstat.h |    2 +-
>>  mm/vmscan.c            |   15 +++++++--------
> 
> include/trace/events/vmscan.h needs to account for the array-ification of
> nr_activate too.

Yeah, thanks.
diff mbox series

Patch

diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 2db8d60981fe..bdeda4b079fe 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -26,7 +26,7 @@  struct reclaim_stat {
 	unsigned nr_congested;
 	unsigned nr_writeback;
 	unsigned nr_immediate;
-	unsigned nr_activate;
+	unsigned nr_activate[2];
 	unsigned nr_ref_keep;
 	unsigned nr_unmap_fail;
 };
diff --git a/mm/vmscan.c b/mm/vmscan.c
index ac4806f0f332..84542004a277 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1107,6 +1107,7 @@  static unsigned long shrink_page_list(struct list_head *page_list,
 	LIST_HEAD(ret_pages);
 	LIST_HEAD(free_pages);
 	unsigned nr_reclaimed = 0;
+	unsigned pgactivate = 0;
 
 	memset(stat, 0, sizeof(*stat));
 	cond_resched();
@@ -1466,8 +1467,10 @@  static unsigned long shrink_page_list(struct list_head *page_list,
 			try_to_free_swap(page);
 		VM_BUG_ON_PAGE(PageActive(page), page);
 		if (!PageMlocked(page)) {
+			int type = page_is_file_cache(page);
 			SetPageActive(page);
-			stat->nr_activate++;
+			pgactivate++;
+			stat->nr_activate[type] += hpage_nr_pages(page);
 			count_memcg_page_event(page, PGACTIVATE);
 		}
 keep_locked:
@@ -1482,7 +1485,7 @@  static unsigned long shrink_page_list(struct list_head *page_list,
 	free_unref_page_list(&free_pages);
 
 	list_splice(&ret_pages, page_list);
-	count_vm_events(PGACTIVATE, stat->nr_activate);
+	count_vm_events(PGACTIVATE, pgactivate);
 
 	return nr_reclaimed;
 }
@@ -1807,7 +1810,6 @@  static int too_many_isolated(struct pglist_data *pgdat, int file,
 static noinline_for_stack void
 putback_inactive_pages(struct lruvec *lruvec, struct list_head *page_list)
 {
-	struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;
 	struct pglist_data *pgdat = lruvec_pgdat(lruvec);
 	LIST_HEAD(pages_to_free);
 
@@ -1833,11 +1835,6 @@  putback_inactive_pages(struct lruvec *lruvec, struct list_head *page_list)
 		lru = page_lru(page);
 		add_page_to_lru_list(page, lruvec, lru);
 
-		if (is_active_lru(lru)) {
-			int file = is_file_lru(lru);
-			int numpages = hpage_nr_pages(page);
-			reclaim_stat->recent_rotated[file] += numpages;
-		}
 		if (put_page_testzero(page)) {
 			__ClearPageLRU(page);
 			__ClearPageActive(page);
@@ -1945,6 +1942,8 @@  shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
 		count_memcg_events(lruvec_memcg(lruvec), PGSTEAL_DIRECT,
 				   nr_reclaimed);
 	}
+	reclaim_stat->recent_rotated[0] = stat.nr_activate[0];
+	reclaim_stat->recent_rotated[1] = stat.nr_activate[1];
 
 	putback_inactive_pages(lruvec, &page_list);