On Fri, 2010-09-17 at 14:26 -0400, Jeff Garzik wrote: > > But that raises the familiar tale of: using multiple atomics (w/ their > locked instructions) may cost more than a spinlock. > As brought up by James earlier, the scsi_host lock was used in so many places that getting rid of it here to reduce contention for it will be a net win, even with the cost of the atomics. And for most LLDs that don't need the serial number, we can just initialize it to zero for those and have no need to increment it (thus also avoiding the atomics' cost). Tim -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
