Re: [Qemu-devel] [PATCH v2] block: Introduce "null" driver

[Markus Armbruster]

Fam Zheng <address@hidden> writes:

> This is an analogue to Linux null_blk. It can be used for testing block
> device emulation and general block layer functionalities such as
> coroutines and throttling, where disk IO is not necessary or wanted.
>
> Use null:// for AIO version, and null-co:// for coroutine version.
>
> Signed-off-by: Fam Zheng <address@hidden>
>
> ---
> V2: Don't #ifdef code, add two drivers. (Benoit)
>     Add to QAPI BlockdevOptions. (Eric)
>     Add "file.size" option to override backend size. (What is a better
>     way to associate /dev/vd{a,b,c} with command line devices, if sizes
>     are the same?)

Is this a request for advice?  If yes, please explain the problem in
more detail, because I'm too dense to get it :)