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Bug 920663 - =app-emulation/qemu-8.2.0 very slow with spice protocol.
Summary: =app-emulation/qemu-8.2.0 very slow with spice protocol.
Status: RESOLVED UPSTREAM
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal
Assignee: Virtualization Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-12-24 15:05 UTC by Yuriy Dmitriev
Modified: 2024-01-09 10:51 UTC (History)
2 users (show)

See Also:
Package list:
Runtime testing required: ---

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Description Yuriy Dmitriev 2023-12-24 15:05:34 UTC 
~amd64

=app-emulation/qemu-8.2.0 is unusable when use with spice protocol.

Temporary solution is roll-back to prev version, which is app-emulation/qemu-8.1.3

With besh whishes - YD.
Comment 1 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2023-12-24 15:10:06 UTC 
Could you report it upstream please?
Comment 2 Yuriy Dmitriev 2023-12-24 16:03:48 UTC 
(In reply to Sam James from comment #1)
> Could you report it upstream please?

Sorry, no. Gitlab require from me too much personal information. I am not agree.
Comment 3 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2023-12-24 16:13:55 UTC 
I'm not really sure we can do much about this. It's not a packaging bug and there's not really enough information for me to forward it myself either.
Comment 4 Yuriy Dmitriev 2023-12-24 16:54:22 UTC 
(In reply to Sam James from comment #3)
> I'm not really sure we can do much about this. It's not a packaging bug and
> there's not really enough information for me to forward it myself either.

Yes, this is not gentoo bug, this is package-specific. Leave it here for informational purpose.

With best wishes - YD.
Comment 5 Mike Gilbert gentoo-dev 2023-12-28 03:32:17 UTC 
(In reply to Yuriy Dmitriev from comment #4)
> Yes, this is not gentoo bug, this is package-specific. Leave it here for
> informational purpose.

Please don't open such bugs for "informational purpose" when you are unwilling to report them upstream.
Comment 6 Matthias Maier gentoo-dev 2023-12-28 11:48:50 UTC 
I have
  =app-emulation/qemu-8.2.0
  =app-emulation/spice-0.15.2
  =app-emulation/spice-protocol-0.14.4

and I do not observe a slowdown with spice in my windows and linux VMs. It's sluggish but not worse than with previous qemu versions.

Yuriy, would you mind to share an  $ emerge --info qemu  so that we can try to reproduce?
Comment 7 Alexander Tsoy 2023-12-29 11:02:24 UTC 
It is also good to know the video device model. There is a known regression in virtio-vga for example.
https://gitlab.com/qemu-project/qemu/-/issues/2051
Comment 8 Yuriy Dmitriev 2024-01-09 10:25:41 UTC 
Hi folks. With latest glibc -2.38.r9 this issue is closed.
Thanks to all!)
Comment 9 Yuriy Dmitriev 2024-01-09 10:51:37 UTC 
(In reply to Alexander Tsoy from comment #7)
> It is also good to know the video device model. There is a known regression
> in virtio-vga for example.
> https://gitlab.com/qemu-project/qemu/-/issues/2051


Yes!!! I reconstruct this issue. I revert to old glibc.
Then test again. Current video driver I set to virtio. 

It reproduce 
> https://gitlab.com/qemu-project/qemu/-/issues/2051

Then I change qemu to 8.2.0 and video driver to qxl.
This changes resolve all.

Summary:
Do not use "vga = virtio" in qemu-8.2.0
Reference: https://gitlab.com/qemu-project/qemu/-/issues/2051

Thanks agan, folks!