KAMEZAWA Hiroyuki wrote:
On Thu, 23 Feb 2012 17:52:04 +0400
Konstantin Khlebnikov<khlebnikov@xxxxxxxxxx> wrote:
This patch adds links from page to its lruvec and from lruvec to its zone and node.
If CONFIG_CGROUP_MEM_RES_CTLR=n they just page_zone() and container_of().
Signed-off-by: Konstantin Khlebnikov<khlebnikov@xxxxxxxxxx>
small comments in below.
---
include/linux/mm.h | 37 +++++++++++++++++++++++++++++++++++++
include/linux/mmzone.h | 12 ++++++++----
mm/internal.h | 1 +
mm/memcontrol.c | 27 ++++++++++++++++++++++++---
mm/page_alloc.c | 17 ++++++++++++++---
5 files changed, 84 insertions(+), 10 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index ee3ebc1..c6dc4ab 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -728,6 +728,43 @@ static inline void set_page_links(struct page *page, enum zone_type zone,
#endif
}
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR
+
+/* Multiple lruvecs in zone */
+
+extern struct lruvec *page_lruvec(struct page *page);
+
+static inline struct zone *lruvec_zone(struct lruvec *lruvec)
+{
+ return lruvec->zone;
+}
+
+static inline struct pglist_data *lruvec_node(struct lruvec *lruvec)
+{
+ return lruvec->node;
+}
+
+#else /* CONFIG_CGROUP_MEM_RES_CTLR */
+
+/* Single lruvec in zone */
+
+static inline struct lruvec *page_lruvec(struct page *page)
+{
+ return&page_zone(page)->lruvec;
+}
+
+static inline struct zone *lruvec_zone(struct lruvec *lruvec)
+{
+ return container_of(lruvec, struct zone, lruvec);
+}
+
+static inline struct pglist_data *lruvec_node(struct lruvec *lruvec)
+{
+ return lruvec_zone(lruvec)->zone_pgdat;
+}
+
+#endif /* CONFIG_CGROUP_MEM_RES_CTLR */
+
/*
* Some inline functions in vmstat.h depend on page_zone()
*/
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index ddd0fd2..be8873a 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -159,10 +159,6 @@ static inline int is_unevictable_lru(enum lru_list lru)
return (lru == LRU_UNEVICTABLE);
}
-struct lruvec {
- struct list_head pages_lru[NR_LRU_LISTS];
-};
-
/* Mask used at gathering information at once (see memcontrol.c) */
#define LRU_ALL_FILE (BIT(LRU_INACTIVE_FILE) | BIT(LRU_ACTIVE_FILE))
#define LRU_ALL_ANON (BIT(LRU_INACTIVE_ANON) | BIT(LRU_ACTIVE_ANON))
@@ -300,6 +296,14 @@ struct zone_reclaim_stat {
unsigned long recent_scanned[2];
};
+struct lruvec {
+ struct list_head pages_lru[NR_LRU_LISTS];
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR
+ struct zone *zone;
+ struct pglist_data *node;
+#endif
I don't think this #ifdef is very good ....this adds other #ifdefs in other headers.
How bad if we remove this #ifdef and use ->zone, ->pgdat in lruvec_zone, lruvec_page
always ?
This adds one dereference in lruvec_zone() if memcg is disabled in config.
We can remove ifdef from declaration and initialization, but keep optimized variant of lruvec_zone()
There may be concerns to fit lruvec at el into cache-line...but this set will add
a (big) hash here later..
I'm sorry if you're asked to add this #ifdef in v1 or v2.
Thanks,
-Kame
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>