Re: [PATCH] kvm tools: Boot to host /bin/sh via 9p by default

[Avi Kivity <avi@redhat.com>]

On 08/09/2011 06:33 PM, Pekka Enberg wrote:
> This patch updates 'kvm run' to boot to host filesystem via 9p '/bin/sh' by
> default:
>
>    $ ./kvm run
>      # kvm run -k ../../arch/x86/boot/bzImage -m 320 -c 2 --name guest-3462
>    [    0.000000] Linux version 3.1.0-rc1+ (penberg@tiger) (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #7 SMP PREEMPT Tue Aug 9 16:39:20 EEST 2011
>    [    0.000000] Command line: notsc noapic noacpi pci=conf1 reboot=k panic=1 console=ttyS0 earlyprintk=serial  init=/bin/sh  root=/dev/vda rw  root=/dev/root rootflags=rw,trans=virtio,version=9p2000.u rootfstype=9p
>
>    [snip]
>
>    [    1.803261] VFS: Mounted root (9p filesystem) on device 0:13.
>    [    1.805153] devtmpfs: mounted
>    [    1.808353] Freeing unused kernel memory: 924k freed
>    [    1.810592] Write protecting the kernel read-only data: 12288k
>    [    1.816268] Freeing unused kernel memory: 632k freed
>    [    1.826030] Freeing unused kernel memory: 1448k freed
>    sh: cannot set terminal process group (-1): Inappropriate ioctl for device
>    sh: no job control in this shell
>    sh-4.1#
>

Most kernels won't have 9p built-in, so how about building a tiny initrd 
to load the needed modules?

btw, I get

# ./kvm run
   # kvm run -k ../../arch/x86/boot/bzImage -m 1728 -c 24 --name guest-10193
<hang>

-- 
error compiling committee.c: too many arguments to function