@@ -366,14 +366,9 @@ static void throttle_fix_bucket(LeakyBucket *bkt)
/* zero bucket level */
bkt->level = bkt->burst_level = 0;
- /* The following is done to cope with the Linux CFQ block scheduler
- * which regroup reads and writes by block of 100ms in the guest.
- * When they are two process one making reads and one making writes cfq
- * make a pattern looking like the following:
- * WWWWWWWWWWWRRRRRRRRRRRRRRWWWWWWWWWWWWWwRRRRRRRRRRRRRRRRR
- * Having a max burst value of 100ms of the average will help smooth the
- * throttling
- */
+ /* If bkt->max is 0 we still want to allow short bursts of I/O
+ * from the guest, otherwise every other request will be throttled
+ * and performance will suffer considerably. */
min = bkt->avg / 10;
if (bkt->avg && !bkt->max) {
bkt->max = min;