Doug, > The Start Stop Unit (SSU) command takes in the order of a second to > complete on some SAS SSDs and longer on hard disks. Synchronize Cache > (SC) can also take some time. Both commands have an IMMED bit in their > cdbs for those apps that don't want to wait. This patch introduces a > long delay for those commands when the IMMED bit is clear. Since SC > is a media access command then when the fake_rw option is active, its > cdb processing is skipped and it returns immediately. The SSU command > is not altered by the setting of the fake_rw option. These actions are > not changed by this patch.
Applied to 4.17/scsi-queue. Thank you! -- Martin K. Petersen Oracle Linux Engineering
