Re: [GIT PULL] Linux KVM tool for v3.7-rc0
From: Ingo Molnar
Date: Sun Oct 21 2012 - 13:51:04 EST
* Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx> wrote:
> On 2012.10.21 at 19:15 +0200, Borislav Petkov wrote:
> > On Sun, Oct 21, 2012 at 05:03:05PM +0200, Ingo Molnar wrote:
> > > The best way to compare them would be a script that gives exactly the
> > > same test environment that 'vm run' / 'vm sandbox' does out of box,
> > > but using qemu.
> > >
> > > If such a script is available then that would certainly be a useful
> > > testing option to kernel developers.
> > Right,
> > I gotta say, I've mucked around with qemu/kvm net options as a novice
> > user and haven't always been successfu. If you get host networking
> > straight away in lkvm then that's another clear point for tools/kvm.
> > Same holds true for copying data back and forth between host and guest.
> I'm agnostic about lkvm, but the following command does all the above:
> qemu-system-x86_64 -enable-kvm -net nic,vlan=0,model=virtio
> -net user -fsdev
> local,security_model=passthrough,id=root,path=/ -device
> virtio-9p-pci,id=root,fsdev=root,mount_tag=/dev/root -m 512
> -smp 2 -kernel /usr/src/linux/arch/x86/boot/bzImage -nographic
> -append "init=/bin/zsh root=/dev/root console=ttyS0
> kgdboc=ttyS0 rootflags=rw,trans=virtio rootfstype=9p ip=dhcp"
> If you want your host root-fs to be mounted rw (to copy data
> back and forth) you need to run to above as root and add "rw"
> to the kernel options.
Why does it have to run as root? I run 'vm' unprivileged (other
than /dev/kvm access).
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