On 18/06/2024 07:49, Christoph Hellwig wrote:
Only NVMe supports an LBA space boundary, so that part is specific to NVMe.
Regardless, the block layer already should ensure that the atomic write
length and boundary is respected. nvme_valid_atomic_write() is just an
insurance policy against the block layer or some other component not doing
its job.
For SCSI, the device would error - for example - if the atomic write length
was larger than the device supported. NVMe silently just does not execute
the write atomically in that scenario, which we must avoid.
It might be worth to expand the comment to include this information to
help future readers.
OK, will do. I have been asked this more than once now.
John
