On Thu, 2006-02-09 at 02:18 +0900, Tejun wrote: > Yeah, I kind of doubt whether hardware vendors would implement and test > all the options and features whene I read SCSI specs. Considering how > many ATA drives have faulty firmware... > > Anyways, it seems ordered-tag support should be left alone for the time > being. Sad. :-( Well ... I've always maintained that ordered queueing is not really a good method of implementing barriers in TCQ environments ... primarily because no-one else really does it, so we'd be uncovering all of the bugs. I suppose I'm a broken record, but I really think linked tasks are the better way to enforce the required ordering guarantees for SCSI TCQ. The problem being that this would present a slightly different API at the block level (you have individual writes that are now ordered, not wholesale barriers). James - : 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
