On 08/10/2011 01:53 AM, Pekka Enberg wrote: > As we boot to '/bin/sh' by default, enable kernel DHCP autoconfiguration too. > The guest kernel needs to be configured with the following configuration > options: > > CONFIG_IP_PNP=y > CONFIG_IP_PNP_DHCP=y > > Cc: Asias He <asias.hejun@xxxxxxxxx> > Cc: Avi Kivity <avi@xxxxxxxxxx> > Cc: Cyrill Gorcunov <gorcunov@xxxxxxxxx> > Cc: Ingo Molnar <mingo@xxxxxxx> > Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Cc: Prasad Joshi <prasadjoshi124@xxxxxxxxx> > Cc: Sasha Levin <levinsasha928@xxxxxxxxx> > Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx> > --- > tools/kvm/README | 3 +++ > tools/kvm/builtin-run.c | 2 +- > 2 files changed, 4 insertions(+), 1 deletions(-) > > diff --git a/tools/kvm/README b/tools/kvm/README > index 5b85461..2cf9364 100644 > --- a/tools/kvm/README > +++ b/tools/kvm/README > @@ -70,6 +70,9 @@ linux-0.2.img.bz2 > - For virtio-rng device (--rng): > CONFIG_HW_RANDOM_VIRTIO=y > > + - For kernel DHCP autoconf (when booting to /bin/sh): > + CONFIG_IP_PNP=y > + CONFIG_IP_PNP_DHCP=y > > 5. And finally, launch the hypervisor: > > diff --git a/tools/kvm/builtin-run.c b/tools/kvm/builtin-run.c > index fa5de27..af7f59c 100644 > --- a/tools/kvm/builtin-run.c > +++ b/tools/kvm/builtin-run.c > @@ -601,7 +601,7 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix) > using_rootfs = 1; > > if (!strstr(real_cmdline, "init=")) > - strlcat(real_cmdline, " init=/bin/sh ", sizeof(real_cmdline)); > + strlcat(real_cmdline, " init=/bin/sh ip=dhcp ", sizeof(real_cmdline)); > } > > if (!strstr(real_cmdline, "root=")) 'ip=dhcp' makes kernel try to use nfs as root fs which results in a long time 'wait and fail' and finally fallback to 9p as root fs. [ 1.688000] Sending DHCP requests ., OK [ 1.695000] IP-Config: Got DHCP answer from 192.168.33.1, my address is 192.168.33.15 [ 1.699000] IP-Config: Complete: [ 1.700000] device=eth0, addr=192.168.33.15, mask=255.255.255.0, gw=192.168.33.1, [ 1.703000] host=192.168.33.15, domain=stu.buaa.edu.cn, nis-domain=(none), [ 1.706000] bootserver=192.168.33.1, rootserver=192.168.33.1, rootpath= [ 36.769000] VFS: Unable to mount root fs via NFS, trying floppy. [ 36.771000] VFS: Mounted root (9p filesystem) on device 0:14. -- Best Regards, Asias He -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
