I needed to inject I/O completion latency in the RAID5/6 codes for test purpose. I was wondering where would be the good place in md/raid5.c code to add delay ? So far I have tried adding mdelay/udelay in raid5_end_write_request() and it seems it works to increase I/O completion of writes. However, adding delay in raid5_end_read_request() does not really change the read I/O latency. Any idea ? --Alireza -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html