Re: [RFC v4 0/9] Add support for zoned device

[Sam Li]

Markus Armbruster <armbru@redhat.com> 于2022年7月12日周二 13:47写道：
>
> Sam Li <faithilikerun@gmail.com> writes:
>
> > This patch series adds support for zoned device to virtio-blk emulation. 
> > Zoned
> > Storage can support sequential writes, which reduces write amplification in 
> > SSD,
> > leading to higher write throughput and increased capacity.
>
> Forgive me if this has already been discussed, or is explained deeper in
> the patch series...
>
> The commit message sounds like you're extending virtio-blk to optionally
> emulate zoned storage.  Correct?

Yes! The main purpose is to emulate zoned storage only for the zoned
device files. Right now, QEMU sees those as regular block devices.

> PATCH 1 adds a new block block device driver 'zoned_host_device', and
> PATCH 9 exposes it in QAPI.  This is for passing through a zoned host
> device, correct?

Yes! It allows the guest os see zoned host device. It is still in
development. Maybe the implementations will change later.


Best regards,
Sam