Hi Doug, > Now I decided to check the SG_IO ioctl used directly > against block devices and it calls: > blk_execute_rq(q, bd_disk, rq, 0); > > The last argument is 'at_head' so it has been queuing > at_tail for some time. How is that for compatibility?? > > That almost suggests there should be a > #define SG_FLAG_Q_AT_HEAD 0x20 > > added to sg.h to cover all the bases. I would have to agree that default should be queue at tail and option should be to queue at head since that presents risk of starvation and is generally not what is desired, just like normal SCSI queue at head in the target. I'll give your patch a spin on live hardware soon. - Mike -- 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
