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

[Markus Armbruster]

Sam Li <faithilikerun@gmail.com> writes:

> 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.

Your cover letter only mentions the virtio-blk part, not the
pass-through part.  Please correct that if you need to respin.