From: Ming Lei <tom.leiming@gmail.com>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: "Richard W.M. Jones" <rjones@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
io-uring@vger.kernel.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org,
Kirill Tkhai <kirill.tkhai@openvz.org>,
Manuel Bentele <development@manuel-bentele.de>,
qemu-devel@nongnu.org, Kevin Wolf <kwolf@redhat.com>,
Xie Yongji <xieyongji@bytedance.com>,
"Denis V. Lunev" <den@openvz.org>,
Stefano Garzarella <sgarzare@redhat.com>
Subject: Re: ublk-qcow2: ublk-qcow2 is available
Date: Thu, 13 Oct 2022 09:50:55 +0800 [thread overview]
Message-ID: <Y0du/9K3II70tZTD@T590> (raw)
In-Reply-To: <CAJSP0QXbnhkVgfgMfC=MAyvF63Oof_ZGDvNFhniDCvVY-f6Hmw@mail.gmail.com>
On Wed, Oct 12, 2022 at 10:15:28AM -0400, Stefan Hajnoczi wrote:
> On Thu, 6 Oct 2022 at 06:14, Richard W.M. Jones <rjones@redhat.com> wrote:
> >
> > On Tue, Oct 04, 2022 at 09:53:32AM -0400, Stefan Hajnoczi wrote:
> > > qemu-nbd doesn't use io_uring to handle the backend IO,
> >
> > Would this be fixed by your (not yet upstream) libblkio driver for
> > qemu?
>
> I was wrong, qemu-nbd has syntax to use io_uring:
>
> $ qemu-nbd ... --image-opts driver=file,filename=test.img,aio=io_uring
Yeah, I saw the option, previously when I tried io_uring via:
qemu-nbd -c /dev/nbd11 -n --aio=io_uring $my_file
It complains that 'qemu-nbd: Invalid aio mode 'io_uring'' even though
that 'qemu-nbd --help' does say that io_uring is supported.
Today just tried it on Fedora 37, looks it starts working with
--aio=io_uring, but the IOPS is basically same with --aio=native, and
IO trace shows that io_uring is used by qemu-nbd.
Thanks,
Ming
next prev parent reply other threads:[~2022-10-13 1:51 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Yza1u1KfKa7ycQm0@T590>
2022-10-03 19:53 ` ublk-qcow2: ublk-qcow2 is available Stefan Hajnoczi
2022-10-03 23:57 ` Denis V. Lunev
2022-10-05 15:11 ` Stefan Hajnoczi
2022-10-06 10:26 ` Ming Lei
2022-10-06 13:59 ` Stefan Hajnoczi
2022-10-06 15:09 ` Ming Lei
2022-10-06 18:29 ` Stefan Hajnoczi
2022-10-07 11:21 ` Ming Lei
2022-10-04 9:43 ` Ming Lei
2022-10-04 13:53 ` Stefan Hajnoczi
2022-10-05 4:18 ` Ming Lei
2022-10-05 12:21 ` Stefan Hajnoczi
2022-10-05 12:38 ` Denis V. Lunev
2022-10-06 11:24 ` Ming Lei
2022-10-07 10:04 ` Yongji Xie
2022-10-07 10:51 ` Ming Lei
2022-10-07 11:21 ` Yongji Xie
2022-10-07 11:23 ` Ming Lei
2022-10-06 10:14 ` Richard W.M. Jones
2022-10-12 14:15 ` Stefan Hajnoczi
2022-10-13 1:50 ` Ming Lei [this message]
2022-10-13 16:01 ` Stefan Hajnoczi
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