>>>>> "KY" == KY Srinivasan <kys@xxxxxxxxxxxxx> writes: KY> For the pass through case, the host validates the request and passes KY> the request to the device. However, not all scsi commands are KY> passed through even though the device it is being passed through may KY> support the command. WRITE_SAME is one such command. Consequently, KY> in the EVPD page, we will set state indicating that WRITE_SAME is KY> not supported (even if the device supports it). The LBP VPD page flags UNMAP as being supported. Do you actually support UNMAP to DSM TRIM SCSI-ATA translation? One challenge in that department is that a single UNMAP command may turn into many, many, many DSM TRIM commands on the underlying SATA device. That's why we went with WRITE SAME for the internal Linux SATL, capping the maximum number of blocks to what we can fit in a single DSM TRIM command. -- Martin K. Petersen Oracle Linux Engineering _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
