X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=mm%2Fmemcontrol.c;h=0ae2dc3a17486de390201e7327c0ef75dd7c6639;hb=1ab5c05695bd514119a15f74d2e43456fe94b0e5;hp=3d7a3d02b16892a7531c5a087b73eddbacc1688e;hpb=8ad6e404efa294b848782cf14f3d298762674e58;p=linux-2.6-block.git

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 3d7a3d02b168..0ae2dc3a1748 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1176,20 +1176,6 @@ void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
 	}
 }
 
-/*
- * This function returns the number of memcg under hierarchy tree. Returns
- * 1(self count) if no children.
- */
-static int mem_cgroup_count_children(struct mem_cgroup *memcg)
-{
-	int num = 0;
-	struct mem_cgroup *iter;
-
-	for_each_mem_cgroup_tree(iter, memcg)
-		num++;
-	return num;
-}
-
 /*
  * Return the memory (and swap, if configured) limit for a memcg.
  */
@@ -2463,24 +2449,11 @@ static DEFINE_MUTEX(memcg_limit_mutex);
 static int mem_cgroup_resize_limit(struct mem_cgroup *memcg,
 				   unsigned long limit, bool memsw)
 {
-	unsigned long curusage;
-	unsigned long oldusage;
 	bool enlarge = false;
-	int retry_count;
 	int ret;
 	bool limits_invariant;
 	struct page_counter *counter = memsw ? &memcg->memsw : &memcg->memory;
 
-	/*
-	 * For keeping hierarchical_reclaim simple, how long we should retry
-	 * is depends on callers. We set our retry-count to be function
-	 * of # of children which we should visit in this loop.
-	 */
-	retry_count = MEM_CGROUP_RECLAIM_RETRIES *
-		      mem_cgroup_count_children(memcg);
-
-	oldusage = page_counter_read(counter);
-
 	do {
 		if (signal_pending(current)) {
 			ret = -EINTR;
@@ -2507,15 +2480,12 @@ static int mem_cgroup_resize_limit(struct mem_cgroup *memcg,
 		if (!ret)
 			break;
 
-		try_to_free_mem_cgroup_pages(memcg, 1, GFP_KERNEL, !memsw);
-
-		curusage = page_counter_read(counter);
-		/* Usage is reduced ? */
-		if (curusage >= oldusage)
-			retry_count--;
-		else
-			oldusage = curusage;
-	} while (retry_count);
+		if (!try_to_free_mem_cgroup_pages(memcg, 1,
+					GFP_KERNEL, !memsw)) {
+			ret = -EBUSY;
+			break;
+		}
+	} while (true);
 
 	if (!ret && enlarge)
 		memcg_oom_recover(memcg);