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authorHugh Dickins <hughd@google.com>2012-03-21 16:34:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-21 17:55:00 -0700
commit1eb4927251a4e5ab152e64afb29453547365fde8 (patch)
treee2b51066c91c8a704251dfdfab6b94471206a00f /mm/memcontrol.c
parentd79154bb5223edad407db61f59b9b15b0080ed80 (diff)
downloadlinux-1eb4927251a4e5ab152e64afb29453547365fde8.tar.bz2
memcg: lru_size instead of MEM_CGROUP_ZSTAT
I never understood why we need a MEM_CGROUP_ZSTAT(mz, idx) macro to obscure the LRU counts. For easier searching? So call it lru_size rather than bare count (lru_length sounds better, but would be wrong, since each huge page raises lru_size hugely). Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Kirill A. Shutemov <kirill@shutemov.name> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e5370db7ad72..6405e78e26e7 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -135,7 +135,7 @@ struct mem_cgroup_reclaim_iter {
*/
struct mem_cgroup_per_zone {
struct lruvec lruvec;
- unsigned long count[NR_LRU_LISTS];
+ unsigned long lru_size[NR_LRU_LISTS];
struct mem_cgroup_reclaim_iter reclaim_iter[DEF_PRIORITY + 1];
@@ -147,8 +147,6 @@ struct mem_cgroup_per_zone {
struct mem_cgroup *memcg; /* Back pointer, we cannot */
/* use container_of */
};
-/* Macro for accessing counter */
-#define MEM_CGROUP_ZSTAT(mz, idx) ((mz)->count[(idx)])
struct mem_cgroup_per_node {
struct mem_cgroup_per_zone zoneinfo[MAX_NR_ZONES];
@@ -728,7 +726,7 @@ mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid,
for_each_lru(l) {
if (BIT(l) & lru_mask)
- ret += MEM_CGROUP_ZSTAT(mz, l);
+ ret += mz->lru_size[l];
}
return ret;
}
@@ -1077,7 +1075,7 @@ struct lruvec *mem_cgroup_lru_add_list(struct zone *zone, struct page *page,
mz = page_cgroup_zoneinfo(memcg, page);
/* compound_order() is stabilized through lru_lock */
- MEM_CGROUP_ZSTAT(mz, lru) += 1 << compound_order(page);
+ mz->lru_size[lru] += 1 << compound_order(page);
return &mz->lruvec;
}
@@ -1105,8 +1103,8 @@ void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru)
VM_BUG_ON(!memcg);
mz = page_cgroup_zoneinfo(memcg, page);
/* huge page split is done under lru_lock. so, we have no races. */
- VM_BUG_ON(MEM_CGROUP_ZSTAT(mz, lru) < (1 << compound_order(page)));
- MEM_CGROUP_ZSTAT(mz, lru) -= 1 << compound_order(page);
+ VM_BUG_ON(mz->lru_size[lru] < (1 << compound_order(page)));
+ mz->lru_size[lru] -= 1 << compound_order(page);
}
void mem_cgroup_lru_del(struct page *page)
@@ -3629,7 +3627,7 @@ static int mem_cgroup_force_empty_list(struct mem_cgroup *memcg,
mz = mem_cgroup_zoneinfo(memcg, node, zid);
list = &mz->lruvec.lists[lru];
- loop = MEM_CGROUP_ZSTAT(mz, lru);
+ loop = mz->lru_size[lru];
/* give some margin against EBUSY etc...*/
loop += 256;
busy = NULL;