On Thu, 7 Jul 2011 15:52:17 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote:
> In mm/memcontrol.c, there are many lru stat functions as..
>
> mem_cgroup_zone_nr_lru_pages
> mem_cgroup_node_nr_file_lru_pages
> mem_cgroup_nr_file_lru_pages
> mem_cgroup_node_nr_anon_lru_pages
> mem_cgroup_nr_anon_lru_pages
> mem_cgroup_node_nr_unevictable_lru_pages
> mem_cgroup_nr_unevictable_lru_pages
> mem_cgroup_node_nr_lru_pages
> mem_cgroup_nr_lru_pages
> mem_cgroup_get_local_zonestat
>
> Some of them are under #ifdef MAX_NUMNODES >1 and others are not.
> This seems bad. This patch consolidates all functions into
>
> mem_cgroup_zone_nr_lru_pages()
> mem_cgroup_node_nr_lru_pages()
> mem_cgroup_nr_lru_pages()
>
> For these functions, "which LRU?" information is passed by a mask.
>
> example)
> mem_cgroup_nr_lru_pages(mem, BIT(LRU_ACTIVE_ANON))
>
> And I added some macro as ALL_LRU, ALL_LRU_FILE, ALL_LRU_ANON.
> example)
> mem_cgroup_nr_lru_pages(mem, ALL_LRU)
>
> BTW, considering layout of NUMA memory placement of counters, this patch seems
> to be better.
>
> Now, when we gather all LRU information, we scan in following orer
> for_each_lru -> for_each_node -> for_each_zone.
>
> This means we'll touch cache lines in different node in turn.
>
> After patch, we'll scan
> for_each_node -> for_each_zone -> for_each_lru(mask)
>
> Then, we'll gather information in the same cacheline at once.
mm/vmscan.c: In function 'zone_nr_lru_pages':
mm/vmscan.c:175: warning: passing argument 2 of 'mem_cgroup_zone_nr_lru_pages' makes pointer from integer without a cast
include/linux/memcontrol.h:307: note: expected 'struct zone *' but argument is of type 'int'
mm/vmscan.c:175: error: too many arguments to function 'mem_cgroup_zone_nr_lru_pages'
--- a/include/linux/memcontrol.h~memcg-consolidates-memory-cgroup-lru-stat-functions-fix
+++ a/include/linux/memcontrol.h
@@ -304,8 +304,8 @@ mem_cgroup_inactive_file_is_low(struct m
}
static inline unsigned long
-mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, struct zone *zone,
- enum lru_list lru)
+mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid,
+ unsigned int lru_mask)
{
return 0;
}
> +unsigned long
> +mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *mem, int nid, int zid,
> + unsigned int lru_mask)
The memcg code sometimes uses "struct mem_cgroup *mem" and sometimes
uses "struct mem_cgroup *memcg". That's irritating. I think "memcg"
is better.
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