Re: [PATCH 0/3][RFC] virtio-blk: add io_uring passthrough support for virtio-blk

[Ferry Meng]

On 12/18/24 5:07 AM, Jens Axboe wrote:
> On 12/17/24 2:00 PM, Stefan Hajnoczi wrote:
> > On Tue, 17 Dec 2024 at 12:54, Jens Axboe <axboe@xxxxxxxxx> wrote:
> > > On 12/16/24 11:08 PM, Jingbo Xu wrote:
> > > > > That's why I asked Jens to weigh in on whether there is a generic
> > > > > block layer solution here. If uring_cmd is faster then maybe a generic
> > > > > uring_cmd I/O interface can be defined without tying applications to
> > > > > device-specific commands. Or maybe the traditional io_uring code path
> > > > > can be optimized so that bypass is no longer attractive.
> > > It's not that the traditional io_uring code path is slower, it's in fact
> > > basically the same thing. It's that all the other jazz that happens
> > > below io_uring slows things down, which is why passthrough ends up being
> > > faster.
> > Are you happy with virtio_blk passthrough or do you want a different approach?
> I think it looks fine.
OK, thx. I will submit the official patch for review soon after 
resolving the test bot warning.