From: Kevin Wolf <kwolf@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Gabriel Southern <gsouther@qti.qualcomm.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: Using loadvm with snapshot
Date: Tue, 24 Aug 2021 17:20:54 +0200 [thread overview]
Message-ID: <YSUOVqyjJ4xqsMgK@redhat.com> (raw)
In-Reply-To: <CAFEAcA_h_WWf=0rU1yTqOA4AH5kYfLNqdbqHokdtoBP7bmepUw@mail.gmail.com>
Am 17.08.2021 um 20:48 hat Peter Maydell geschrieben:
> On Tue, 17 Aug 2021 at 17:27, Dr. David Alan Gilbert
> <dgilbert@redhat.com> wrote:
> >
> > * Gabriel Southern (gsouther@qti.qualcomm.com) wrote:
> > > Hi,
> > >
> > > Are there plans to support using -loadvm with -snapshot?
> > >
> > > I saw some past discussion on mailing list including bug that was closed earlier this year but no recent activity:
> > >
> > > https://lore.kernel.org/qemu-devel/162424905685.11837.7303570061857383641.malone@loganberry.canonical.com/
> > >
> > > Testing with latest qemu it looks like -loadvm still does not work when combined with -snapshot.
> > >
> > > I'm curious how complex it would be to implement this feature and if it may show up on QEMU roadmap in the future. Or if there is alterative command that can be used to save the state of a running VM and then use the same qcow to run multiple QEMU instances loading this VM state running in snapshot mode.
>
> Do you know why -loadvm and -snapshot don't work together?
> It doesn't on the face of it seem like they would be incompatible...
Probably because -snapshot first adds a temporary qcow2 overlay to the
image, and then -loadvm fails because the newly created temporary
overlay doesn't contain the requested snapshot.
Internal and external snapshots don't really mix well.
Kevin
next prev parent reply other threads:[~2021-08-24 15:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-12 0:09 Using loadvm with snapshot Gabriel Southern
2021-08-17 16:26 ` Dr. David Alan Gilbert
2021-08-17 18:48 ` Peter Maydell
2021-08-17 18:53 ` Dr. David Alan Gilbert
2021-08-24 15:20 ` Kevin Wolf [this message]
2021-08-24 15:25 ` Peter Maydell
2021-08-24 16:20 ` Kevin Wolf
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