Chao, > As SCSI SBC4 specification section 5.30.2 describes that it can > support unmapping one or more LBA range in single UNMAP command. > > However, previously we only pack one LBA range in UNMAP command by > default no matter device gives the block limits that says it can > support unmapping multiple LBA ranges with a single UNMAP command. > > This patch sets max_discard_segments config according to block limits > of device, and supports unmapping multiple LBA ranges with a single > UNMAP command. This looks OK to me. Will test with a variety of targets. -- Martin K. Petersen Oracle Linux Engineering
