At some point the method of issuing Write Same for ATA drives changed. Currently write same is commonly available via SCT so expose the SCT capabilities and use SCT Write Same if available. This is useful for zoned based media that prefers to support discard with lbprz set, aka discard zeroes data by mapping discard operations to reset write pointer operations. Conventional zones that do not support reset write pointer can still honor the discard zeroes data by issuing a write same over the zone. Cc: "James E.J. Bottomley" <jejb@xxxxxxxxxxxxxxxxxx> Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx> Cc: Tejun Heo <tj@xxxxxxxxxx> Shaun Tancheff (1): Add support for SCT Write Same drivers/ata/libata-scsi.c | 32 ++++++++++++++++++++++++++++++++ drivers/scsi/sd.c | 21 +++++++++++++-------- include/linux/ata.h | 43 +++++++++++++++++++++++++++++++++++++++++++ include/scsi/scsi_device.h | 1 + 4 files changed, 89 insertions(+), 8 deletions(-) -- 2.8.1 -- 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
