On 3/2/23 08:50, Bart Van Assche wrote: > On 3/1/23 15:34, Khazhy Kumykov wrote: >> - There’s already support in the kernel for marking zones >> online/offline and cmr/smr, but this is fixed, not dynamic. Would >> there be hiccups with allowing zones to come online/offline while >> running? > > It may be easier to convince HDD vendors to modify their firmware such > that the conventional and SMR zones are reported to the Linux kernel as > different logical units rather than adding domains & realms support in > the Linux kernel. If anyone else has another opinion, feel free to share > that opinion. That would not resolve the fact that each unit would still potentially have a mix of active and inactive areas. Total nightmare to deal with unless a zone API is also exposed for any user to figure out which zone is active. That means that we would need to always expose these drives as zoned, using a very weird zone model as zone domains/zone realms do not fit at all with the current host-managed model. Lots of places need changes to handle these drives. This will make things very messy all over. > > Whether or not others agree with my opinion, I think this is a good > topic for LSF/MM. > > Thanks, > > Bart. > -- Damien Le Moal Western Digital Research
