On Mon, 14 Sep 2009 11:46:37 +0300 Or Gerlitz <ogerlitz@xxxxxxxxxxxx> wrote: > FUJITA Tomonori wrote: > > Somehow, I/O threads perform requests in FILO manner. We should use FIFO for better performance > Hi Tomo, > > Isn't LIFO processing being a NO NO for target that eventually provides > block device interface towards the initiator stack... so first and most, > this is a bug fix, thoughts? It's not. tgt properly handles SCSI ordering rule. The patch is about I/O threads policy. I/O threads simultaneously performs multiple SCSI commands that can be performed in any order. I/O threads uses FILO so if I/O threads has tons of requests, the latency of the first request could be large. -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
