From: Wei Li <wei.d.li@oracle.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>,
Stefan Hajnoczi <stefanha@gmail.com>,
Dongli Zhang <dongli.zhang@oracle.com>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Following up questions related to QEMU and I/O Thread
Date: Mon, 29 Apr 2019 10:49:31 -0700 [thread overview]
Message-ID: <F5614236-1B07-421B-8FE6-90129297014F@oracle.com> (raw)
In-Reply-To: <825292440.15675844.1556339085478.JavaMail.zimbra@redhat.com>
Thanks Paolo for your clarification!
Just wanted to double confirm, does this mean batch I/O submission won't apply to aio=threads (which is the default mode)?
Thanks,
Wei
On 4/26/19, 9:25 PM, "Paolo Bonzini" <pbonzini@redhat.com> wrote:
> Thanks Stefan and Paolo for your response and advice!
>
> Hi Paolo,
>
> As to the virtio-scsi batch I/O submission feature in QEMU which you
> mentioned, is this feature turned on by default in QEMU 2.9 or there is a
> tunable parameters to turn on/off the feature?
Yes, it is available by default since 2.2.0. It cannot be turned off, however
it is only possible to batch I/O with aio=native (and, since 2.12.0, with the NVMe
backend).
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Wei Li <wei.d.li@oracle.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Stefan Hajnoczi <stefanha@gmail.com>,
qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>,
Dongli Zhang <dongli.zhang@oracle.com>
Subject: Re: [Qemu-devel] Following up questions related to QEMU and I/O Thread
Date: Mon, 29 Apr 2019 10:49:31 -0700 [thread overview]
Message-ID: <F5614236-1B07-421B-8FE6-90129297014F@oracle.com> (raw)
Message-ID: <20190429174931.nV-hji_DBLvmac50AVl7Wb8AKKxdVlB2kSc5bhXTUQk@z> (raw)
In-Reply-To: <825292440.15675844.1556339085478.JavaMail.zimbra@redhat.com>
Thanks Paolo for your clarification!
Just wanted to double confirm, does this mean batch I/O submission won't apply to aio=threads (which is the default mode)?
Thanks,
Wei
On 4/26/19, 9:25 PM, "Paolo Bonzini" <pbonzini@redhat.com> wrote:
> Thanks Stefan and Paolo for your response and advice!
>
> Hi Paolo,
>
> As to the virtio-scsi batch I/O submission feature in QEMU which you
> mentioned, is this feature turned on by default in QEMU 2.9 or there is a
> tunable parameters to turn on/off the feature?
Yes, it is available by default since 2.2.0. It cannot be turned off, however
it is only possible to batch I/O with aio=native (and, since 2.12.0, with the NVMe
backend).
Paolo
next prev parent reply other threads:[~2019-04-29 17:49 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-04 17:33 [Qemu-devel] Following up questions related to QEMU and I/O Thread Wei Li
2019-03-05 17:29 ` Stefan Hajnoczi
[not found] ` <2D7F11D0-4A02-4A0F-961D-854240376B17@oracle.com>
2019-04-01 9:07 ` Stefan Hajnoczi
2019-04-05 21:09 ` Wei Li
2019-04-05 21:09 ` Wei Li
2019-04-16 14:01 ` Paolo Bonzini
2019-04-16 14:01 ` Paolo Bonzini
2019-04-17 1:38 ` Wei Li
2019-04-17 1:38 ` Wei Li
2019-04-17 12:17 ` Paolo Bonzini
2019-04-17 12:17 ` Paolo Bonzini
2019-04-18 3:34 ` Wei Li
2019-04-18 3:34 ` Wei Li
[not found] ` <CC372DF3-1AC6-46B5-98A5-21159497034A@oracle.com>
2019-04-15 17:34 ` Wei Li
2019-04-15 17:34 ` Wei Li
2019-04-15 23:23 ` Dongli Zhang
2019-04-15 23:23 ` Dongli Zhang
2019-04-16 9:20 ` Stefan Hajnoczi
2019-04-16 9:20 ` Stefan Hajnoczi
2019-04-17 1:42 ` Wei Li
2019-04-17 1:42 ` Wei Li
[not found] ` <8E5AF770-69ED-4D44-8A25-B51344996D9E@oracle.com>
2019-04-23 4:21 ` Wei Li
2019-04-23 4:21 ` Wei Li
2019-04-23 12:04 ` Stefan Hajnoczi
2019-04-23 12:04 ` Stefan Hajnoczi
2019-04-26 8:14 ` Paolo Bonzini
2019-04-26 8:14 ` Paolo Bonzini
2019-04-26 23:02 ` Wei Li
2019-04-26 23:02 ` Wei Li
2019-04-27 4:24 ` Paolo Bonzini
2019-04-27 4:24 ` Paolo Bonzini
2019-04-29 17:49 ` Wei Li [this message]
2019-04-29 17:49 ` Wei Li
2019-04-29 13:40 ` Stefan Hajnoczi
2019-04-29 13:40 ` Stefan Hajnoczi
2019-04-29 17:56 ` Wei Li
2019-04-29 17:56 ` Wei Li
2019-05-01 16:36 ` Stefan Hajnoczi
2019-05-01 16:36 ` Stefan Hajnoczi
2019-05-03 16:21 ` Wei Li
2019-05-03 16:21 ` Wei Li
2019-05-03 18:05 ` Paolo Bonzini
2019-05-03 18:05 ` Paolo Bonzini
2019-05-03 18:11 ` Wei Li
2019-05-03 18:11 ` Wei Li
2019-04-30 11:21 ` Paolo Bonzini
2019-04-30 11:21 ` Paolo Bonzini
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