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>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e5370db..6405e78 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -135,7 +135,7 @@
*/
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 *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 @@
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 @@
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 @@
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 @@
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;