Re: [PATCHv12 00/12] block write streams with nvme fdp

Martin K. Petersen
2024-12-10T01:50:24Z

Hi Keith!

>> 3) drop the support for the remapping of per-partition streams
>
> Yep, pretty much. I will revisit the partition mapping. I just haven't
> heard any use cases for divvying the streams up this way, so it's not
> clear to me what the interface needs to provide.

Since the streams are a (very) scarce hardware resource, it does seem to
me like we should have an explicit interface for an entity (whether
app-on-bdev or a filesystem) to allocate them.

While there certainly are cases where there is a 1:1 app-to-device
mapping, as soon as you add virtualization or enterprise apps to the
mix, that assumption quickly falls apart...

--
Martin K. Petersen Oracle Linux Engineering