Bart, > Neither the SCSI SBC standard nor the NVMe standard defines a "minimum > atomic write unit". So why to introduce something in the Linux kernel > that is not defined in common storage standards? >From SBC-5: "The ATOMIC TRANSFER LENGTH GRANULARITY field indicates the minimum transfer length for an atomic write command." > I propose to leave out stx_atomic_write_unit_min from > struct statx and also to leave out atomic_write_unit_min_sectors from > struct queue_limits. My opinion is that we should not support block > devices in the Linux kernel that do not write logical blocks atomically. The statx values exist to describe the limits for I/Os sent using RWF_ATOMIC and IOCB_ATOMIC. These limits may be different from other reported values such as the filesystem block size and the logical block size of the underlying device. -- Martin K. Petersen Oracle Linux Engineering
