> On May 10, 2024, at 4:40 PM, Kanchan Joshi <joshi.k@xxxxxxxxxxx> wrote: > > Flexible Data Placement (FDP), as ratified in TP 4146a, allows the host > to control the placement of logical blocks so as to reduce the SSD WAF. > > Userspace can send the data lifetime information using the write hints. > The SCSI driver (sd) can already pass this information to the SCSI > devices. This patch does the same for NVMe. > > Fetches the placement-identifiers (plids) if the device supports FDP. > And map the incoming write-hints to plids. > Great! Thanks for sharing the patch. Do we have documentation that explains how, for example, kernel-space file system can work with block layer to employ FDP? Do we have FDP support in QEMU already if there is no access to real device for testing? Thanks, Slava.
