c03d7409f4
Namespace Optimal I/O Boundary field added in NVMe 1.3 and Namespace Preferred Write Granularity added in 1.4 allow upper layers to align I/Os for improved SSD performance and endurance. I don't have hardware reportig those yet, but NPWG could probably be reported by bhyve. MFC after: 2 weeks Sponsored by: iXsystems, Inc.