On Thu, 4 Oct 2007 11:06:56 +0900 Tejun Heo <htejun@xxxxxxxxx> wrote: > From: Paolo Ornati <ornati@xxxxxxxxxxxxx> > > Seagate Barracuda ST380817AS has troubles with NCQ. For example, > unpacking a tarball on an XFS filesystem gives this: > > ata1.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x2 frozen > ata1.00: cmd 61/40:00:29:a3:98/00:00:00:00:00/40 tag 0 cdb 0x0 data 32768 out > res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) Looking at this and our NCQ code I don't see any provision for drive unfairness in our code. If we continue to issue commands to the drive I'm not seeing where we guarantee a given command will ever complete rather than being deferred forever by a dumb drive - which some SCSI drives also will do... - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
