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@xxxxxxxxxx>
---
mm/memcontrol.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
--- mmotm.orig/mm/memcontrol.c 2011-12-30 21:22:05.679339324 -0800
+++ mmotm/mm/memcontrol.c 2011-12-30 21:23:28.243341326 -0800
@@ -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];
@@ -713,7 +711,7 @@ mem_cgroup_zone_nr_lru_pages(struct mem_
for_each_lru(l) {
if (BIT(l) & lru_mask)
- ret += MEM_CGROUP_ZSTAT(mz, l);
+ ret += mz->lru_size[l];
}
return ret;
}
@@ -1048,7 +1046,7 @@ struct lruvec *mem_cgroup_lru_add_list(s
memcg = pc->mem_cgroup;
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;
}
@@ -1076,8 +1074,8 @@ void mem_cgroup_lru_del_list(struct page
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)
@@ -3615,7 +3613,7 @@ static int mem_cgroup_force_empty_list(s
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;
--
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