* [PATCH] kvm tools: Enable kernel DHCP autoconf by default @ 2011-08-09 17:53 Pekka Enberg 2011-08-10 0:03 ` Asias He 0 siblings, 1 reply; 3+ messages in thread From: Pekka Enberg @ 2011-08-09 17:53 UTC (permalink / raw) To: kvm Cc: Pekka Enberg, Asias He, Avi Kivity, Cyrill Gorcunov, Ingo Molnar, Linus Torvalds, Prasad Joshi, Sasha Levin 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@gmail.com> Cc: Avi Kivity <avi@redhat.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Prasad Joshi <prasadjoshi124@gmail.com> Cc: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org> --- 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=")) -- 1.7.0.4 ^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] kvm tools: Enable kernel DHCP autoconf by default 2011-08-09 17:53 [PATCH] kvm tools: Enable kernel DHCP autoconf by default Pekka Enberg @ 2011-08-10 0:03 ` Asias He 2011-08-10 5:00 ` Pekka Enberg 0 siblings, 1 reply; 3+ messages in thread From: Asias He @ 2011-08-10 0:03 UTC (permalink / raw) To: Pekka Enberg Cc: kvm, Avi Kivity, Cyrill Gorcunov, Ingo Molnar, Linus Torvalds, Prasad Joshi, Sasha Levin 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@gmail.com> > Cc: Avi Kivity <avi@redhat.com> > Cc: Cyrill Gorcunov <gorcunov@gmail.com> > Cc: Ingo Molnar <mingo@elte.hu> > Cc: Linus Torvalds <torvalds@linux-foundation.org> > Cc: Prasad Joshi <prasadjoshi124@gmail.com> > Cc: Sasha Levin <levinsasha928@gmail.com> > Signed-off-by: Pekka Enberg <penberg@kernel.org> > --- > 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] kvm tools: Enable kernel DHCP autoconf by default 2011-08-10 0:03 ` Asias He @ 2011-08-10 5:00 ` Pekka Enberg 0 siblings, 0 replies; 3+ messages in thread From: Pekka Enberg @ 2011-08-10 5:00 UTC (permalink / raw) To: Asias He Cc: kvm, Avi Kivity, Cyrill Gorcunov, Ingo Molnar, Linus Torvalds, Prasad Joshi, Sasha Levin On Wed, 10 Aug 2011, Asias He wrote: > 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@gmail.com> >> Cc: Avi Kivity <avi@redhat.com> >> Cc: Cyrill Gorcunov <gorcunov@gmail.com> >> Cc: Ingo Molnar <mingo@elte.hu> >> Cc: Linus Torvalds <torvalds@linux-foundation.org> >> Cc: Prasad Joshi <prasadjoshi124@gmail.com> >> Cc: Sasha Levin <levinsasha928@gmail.com> >> Signed-off-by: Pekka Enberg <penberg@kernel.org> >> --- >> 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. I reverted the patch for now. Thanks, Asias! ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2011-08-10 5:00 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2011-08-09 17:53 [PATCH] kvm tools: Enable kernel DHCP autoconf by default Pekka Enberg 2011-08-10 0:03 ` Asias He 2011-08-10 5:00 ` Pekka Enberg
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