From: "Daniel P. Berrangé" <berrange@redhat.com>
To: Stefano Brivio <sbrivio@redhat.com>
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
"Thomas Huth" <thuth@redhat.com>,
"Beraldo Leal" <bleal@redhat.com>,
"Markus Armbruster" <armbru@redhat.com>,
"Wainer dos Santos Moschetta" <wainersm@redhat.com>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Gerd Hoffmann" <kraxel@redhat.com>,
"Cleber Rosa" <crosa@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>
Subject: Re: "make check-acceptance" takes way too long
Date: Tue, 1 Feb 2022 09:06:25 +0000 [thread overview]
Message-ID: <Yfj4ERdAvmCF4ZzY@redhat.com> (raw)
In-Reply-To: <20220201073139.7896e10b@elisabeth>
On Tue, Feb 01, 2022 at 07:31:39AM +0100, Stefano Brivio wrote:
> Hi,
>
> On Tue, 25 Jan 2022 10:20:11 +0100
> Gerd Hoffmann <kraxel@redhat.com> wrote:
>
> > Hi,
> >
> > > IMHO the ideal scenario would be for us to have a kernel, initrd
> > > containing just busybox tools for the key arch targets we care
> > > about. Those could be used with direct kernel boot or stuffed
> > > into a disk iamge. Either way, they would boot in ~1 second,
> > > even with TCG, and would be able to execute simple shell scripts
> > > to test a decent amount of QEMU functionality.
> >
> > I have some test images based on buildroot which are essentially that.
> > https://gitlab.com/kraxel/br-kraxel/
> >
> > Still a significant download, but much smaller than a full fedora or
> > ubuntu cloud image and it boots much faster too. Not down to only one
> > second though.
>
> I'm not sure you can recycle something from it, but my (ugly) approach
> to make this fast (for a different purpose -- I'm using qemu to run
> tests in guests, not testing qemu) is to build an initramfs by copying
> the host binaries I need (a shell, ip, jq) and recursively sourcing
> libraries using ldd (I guess I mentioned it's ugly).
>
> No downloads, systemd, dracut, etc., guest boots in half a second
> (x86_64 on x86_64, KVM -- no idea with TCG). Host kernel with a few
> modules packed and loaded by a custom init script.
That is such a good idea, that it is exactly what I do too :-)
https://gitlab.com/berrange/tiny-vm-tools/-/blob/master/make-tiny-image.py
it works incredibly well for the simple case of host-arch==guest-arch.
It could be made to work for foreign arch easily enough - just need
to have a foreign chroot lieing around somewhere you can point it
to.
Regards,
Daniel
--
|: https://berrange.com -o- https://www.flickr.com/photos/dberrange :|
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next prev parent reply other threads:[~2022-02-01 9:27 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-30 15:12 "make check-acceptance" takes way too long Peter Maydell
2021-07-30 15:41 ` Philippe Mathieu-Daudé
2021-07-30 15:42 ` Peter Maydell
2021-07-30 22:04 ` Cleber Rosa
2021-07-31 6:39 ` Thomas Huth
2021-07-31 17:58 ` Cleber Rosa
2021-07-31 18:41 ` Alex Bennée
2021-07-31 20:32 ` Peter Maydell
2021-08-02 22:55 ` Cleber Rosa
2021-08-02 8:38 ` Daniel P. Berrangé
2021-08-02 12:47 ` Alex Bennée
2021-08-02 12:59 ` Daniel P. Berrangé
2021-08-02 12:55 ` Alex Bennée
2021-08-02 13:00 ` Peter Maydell
2021-08-02 13:04 ` Daniel P. Berrangé
2021-08-02 13:25 ` Thomas Huth
2021-08-02 13:00 ` Daniel P. Berrangé
2021-08-02 13:27 ` Thomas Huth
2021-08-02 13:43 ` Gerd Hoffmann
2022-01-20 15:13 ` Peter Maydell
2022-01-20 15:35 ` Philippe Mathieu-Daudé via
2022-01-21 7:56 ` Thomas Huth
2022-01-21 10:50 ` Markus Armbruster
2022-01-21 11:33 ` Peter Maydell
2022-01-21 12:23 ` Alex Bennée
2022-01-21 12:41 ` Thomas Huth
2022-01-21 15:21 ` Daniel P. Berrangé
2022-01-25 9:20 ` Gerd Hoffmann
2022-02-01 6:31 ` Stefano Brivio
2022-02-01 7:49 ` Gerd Hoffmann
2022-02-01 9:06 ` Daniel P. Berrangé [this message]
2022-02-01 10:27 ` Stefano Brivio
2022-02-01 11:17 ` Alex Bennée
2022-02-01 16:01 ` Cleber Rosa
2022-02-01 16:19 ` Daniel P. Berrangé
2022-02-01 17:47 ` Cleber Rosa
2022-02-01 18:03 ` Alex Bennée
2022-02-01 19:04 ` Cleber Rosa
2022-02-01 18:35 ` Stefano Brivio
2022-02-01 17:59 ` Cédric Le Goater
2022-02-01 11:06 ` Kashyap Chamarthy
2022-02-01 15:54 ` Cleber Rosa
2022-02-01 5:29 ` Cleber Rosa
2022-02-01 17:01 ` Daniel P. Berrangé
2022-02-01 17:59 ` Cleber Rosa
2022-02-15 18:14 ` Alex Bennée
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