Thanks Martin for the explanation. I'll send out another patch. > -----Original Message----- > From: Martin K. Petersen [mailto:martin.petersen@xxxxxxxxxx] > Sent: Thursday, December 11, 2014 7:04 PM > To: Long Li > Cc: Martin K. Petersen; KY Srinivasan; Haiyang Zhang; > JBottomley@xxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx; > devel@xxxxxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx > Subject: Re: [PATCH] scsi:storvsc enable reading from VPD pages on SPC-2 > > >>>>> "Long" == Long Li <longli@xxxxxxxxxxxxx> writes: > > >> Handle the issues or handle WRITE SAME(10/16)? > > Long> With this patch, the SCSI layer will be able to correctly send > Long> WRITE_SAME_16 to the Hyper-V host. It will not send WRITE_SAME_10: > Long> it has been disabled in the driver template. Do you want me to > Long> send another patch with these details? > > no_write_same prevents us from attempting to use WRITE SAME(10/16) to zero > block ranges. > > This is completely orthogonal to using the WRITE SAME(10/16) commands with > the UNMAP bit set to discard block ranges. The latter is controlled by the logical > block provisioning heuristics and is not affected by no_write_same at all. > > -- > Martin K. Petersen Oracle Linux Engineering -- 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
