[PATCH] temp

[Chris Down]

---
 mm/memcontrol.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index eecf003b0c56..c33e317c3667 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2328,11 +2328,14 @@ static unsigned long calculate_high_delay(struct mem_cgroup *memcg,
 {
 	unsigned long penalty_jiffies;
 	u64 max_overage = 0;
+	int i = 0, i_overage = 0;
 
 	do {
 		unsigned long usage, high;
 		u64 overage;
 
+		i++;
+
 		usage = page_counter_read(&memcg->memory);
 		high = READ_ONCE(memcg->high);
 
@@ -2342,18 +2345,29 @@ static unsigned long calculate_high_delay(struct mem_cgroup *memcg,
 		 */
 		high = max(high, 1UL);
 
+		trace_printk("usage: %lu, high: %lu\n", usage, high);
 		overage = usage - high;
+		trace_printk("%d overage before shifting (%llu)\n", i, overage);
 		overage <<= MEMCG_DELAY_PRECISION_SHIFT;
+		trace_printk("%d overage after shifting (%llu)\n", i, overage);
 		overage = div64_u64(overage, high);
+		trace_printk("%d overage after div (%llu)\n", i, overage);
 
-		if (overage > max_overage)
+		if (overage > max_overage) {
+			trace_printk("%d cgroup new overage (%llu)\n", i, overage);
+			i_overage = i;
 			max_overage = overage;
+		} else {
+			trace_printk("%d cgroup too low (%llu)\n", i, overage);
+		}
 	} while ((memcg = parent_mem_cgroup(memcg)) &&
 		 !mem_cgroup_is_root(memcg));
 
 	if (!max_overage)
 		return 0;
 
+	trace_printk("Used %d from leaf to get result\n", i_overage);
+
 	/*
 	 * We use overage compared to memory.high to calculate the number of
 	 * jiffies to sleep (penalty_jiffies). Ideally this value should be
-- 
2.26.0


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