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Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test ker
From: |
Avi Kivity |
Subject: |
Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test kernels |
Date: |
Tue, 08 Nov 2011 16:57:04 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:7.0) Gecko/20110927 Thunderbird/7.0 |
On 11/08/2011 04:52 PM, Christoph Hellwig wrote:
> On Tue, Nov 08, 2011 at 04:41:40PM +0200, Avi Kivity wrote:
> > On 11/06/2011 03:35 AM, Alexander Graf wrote:
> > > To quickly get going, just execute the following as user:
> > >
> > > $ ./Documentation/run-qemu.sh -r / -a init=/bin/bash
> > >
> > > This will drop you into a shell on your rootfs.
> > >
> >
> > Doesn't work on Fedora 15. F15's qemu-kvm doesn't have -machine or
> > -virtfs. Even qemu.git on F15 won't build virtfs since xattr.h
> > detection is broken (patch posted).
>
> Nevermind that running virtfs as a rootfs is a really dumb idea. You
> do now want to run a VM that has a rootfs that gets changed all the
> time behind your back.
True.
> Running qemu -snapshot on the actual root block device is the only
> safe way to reuse the host installation, although it gets a bit
> complicated if people have multiple devices mounted into the namespace.
How is -snapshot any different? If the host writes a block after the
guest has been launched, but before that block was cowed, then the guest
will see the new block.
It could work with a btrfs snapshot, but not everyone uses that.
--
error compiling committee.c: too many arguments to function
Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test kernels, Avi Kivity, 2011/11/08
Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test kernels, Jan Kiszka, 2011/11/08
Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test kernels, Pekka Enberg, 2011/11/08
Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test kernels, Christoph Hellwig, 2011/11/08