Luis, > A big future question is of course how / when to use these for > filesystems. Should there be, for instance a 'mkfs --optimal-bs' or > something which may look whatever hints the media uses ? Or do we just > leaves the magic incantations to the admins? mkfs already considers the reported queue limits (for the filesystems most people use, anyway). The problem is mainly that the devices don't report them. At least not very often in the NVMe space. For SCSI devices, reporting these parameters is quite common. -- Martin K. Petersen Oracle Linux Engineering