Problem with booting using qemu

Problem with booting using qemu

[Minwoo Lee]

Hi, all.

I want to study kernel, so I tried booting my custom compiled kernel
on qemu with '-kernel' and '-initrd' option.

First, I installed ubuntu 10.10 with cdrom, no LVM.
$ qemu disk.img -cdrom ubuntu-10.10-server-i386.iso -vnc :1

After installation, I tried booting my custom compiled kernel(but not
modified, just compiled).
$ sudo qemu -m 512 -enable-kvm disk.img -nographic -append
"console=ttyS0 root=/dev/sda1 ro" -kernel bzImage -initrd
initrd.img-2.6.37

And I got result like this.

[    2.687558] EXT4-fs (sda1): INFO: recovery required on readonly filesystem
[    2.688085] EXT4-fs (sda1): write access will be enabled during recovery
[    2.691679] EXT4-fs (sda1): recovery complete
[    2.944387] EXT4-fs (sda1): mounted filesystem with ordered data
mode. Opts: (null)
Begin: Running /scripts/local-bottom ... done.
done.
Begin: Running /scripts/init-bottom ... done.
[    2.988413] e1000 0000:00:03.0: eth0: (PCI:33MHz:32-bit) 52:54:00:12:34:56
[    2.988871] e1000 0000:00:03.0: eth0: Intel(R) PRO/1000 Network Connection


After that, the machine just stopped and I don't know the cause.

What is the cause, or how to find the cause?

The whole log is in this url. https://gist.github.com/916961

Thank you for reading.

Problem with booting using qemu

[Mulyadi Santosa]

Hi... :)

On Wed, Apr 13, 2011 at 11:27, Minwoo Lee <ermaker@gmail.com> wrote:
> Hi, all.
>
> I want to study kernel, so I tried booting my custom compiled kernel
> on qemu with '-kernel' and '-initrd' option.
>
> First, I installed ubuntu 10.10 with cdrom, no LVM.
> $ qemu disk.img -cdrom ubuntu-10.10-server-i386.iso -vnc :1
>
> After installation, I tried booting my custom compiled kernel(but not
> modified, just compiled).
> $ sudo qemu -m 512 -enable-kvm disk.img -nographic -append
> "console=ttyS0 root=/dev/sda1 ro" -kernel bzImage -initrd
> initrd.img-2.6.37

Just to make sure few things:
1. are you really going to setup serial console only guest? because I
saw that nographic and console=ttyS0

2. and the initrd, is that the correct initrd that is built against your kernel?

> And I got result like this.
>
> [ ? ?2.687558] EXT4-fs (sda1): INFO: recovery required on readonly filesystem
> [ ? ?2.688085] EXT4-fs (sda1): write access will be enabled during recovery
> [ ? ?2.691679] EXT4-fs (sda1): recovery complete
> [ ? ?2.944387] EXT4-fs (sda1): mounted filesystem with ordered data
> mode. Opts: (null)
> Begin: Running /scripts/local-bottom ... done.
> done.
> Begin: Running /scripts/init-bottom ... done.
> [ ? ?2.988413] e1000 0000:00:03.0: eth0: (PCI:33MHz:32-bit) 52:54:00:12:34:56
> [ ? ?2.988871] e1000 0000:00:03.0: eth0: Intel(R) PRO/1000 Network Connection

just a guess: maybe it didn't freeze...it just display things but
toward serial console.... for a test, I suggest (untested) to dump out
-nographic and instead use buit in qemu serial console. Switch to it
by pressing Ctrl-Alt-3 and see if there are message showing there...

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

Problem with booting using qemu

[Luis Cebamanos]

Hi,

So the chain to boot would be something like :

$ sudo qemu -m 512 -enable-kvm disk.img -append
"console=ttyS0 root=/dev/sda1 ro" -kernel bzImage -initrd
initrd.img-2.6.37


On 14/04/2011 03:51, Mulyadi Santosa wrote:
> Hi... :)
>
> On Wed, Apr 13, 2011 at 11:27, Minwoo Lee<ermaker@gmail.com>  wrote:
>> Hi, all.
>>
>> I want to study kernel, so I tried booting my custom compiled kernel
>> on qemu with '-kernel' and '-initrd' option.
>>
>> First, I installed ubuntu 10.10 with cdrom, no LVM.
>> $ qemu disk.img -cdrom ubuntu-10.10-server-i386.iso -vnc :1
>>
>> After installation, I tried booting my custom compiled kernel(but not
>> modified, just compiled).
>> $ sudo qemu -m 512 -enable-kvm disk.img -nographic -append
>> "console=ttyS0 root=/dev/sda1 ro" -kernel bzImage -initrd
>> initrd.img-2.6.37
> Just to make sure few things:
> 1. are you really going to setup serial console only guest? because I
> saw that nographic and console=ttyS0
>
> 2. and the initrd, is that the correct initrd that is built against your kernel?
>
>> And I got result like this.
>>
>> [    2.687558] EXT4-fs (sda1): INFO: recovery required on readonly filesystem
>> [    2.688085] EXT4-fs (sda1): write access will be enabled during recovery
>> [    2.691679] EXT4-fs (sda1): recovery complete
>> [    2.944387] EXT4-fs (sda1): mounted filesystem with ordered data
>> mode. Opts: (null)
>> Begin: Running /scripts/local-bottom ... done.
>> done.
>> Begin: Running /scripts/init-bottom ... done.
>> [    2.988413] e1000 0000:00:03.0: eth0: (PCI:33MHz:32-bit) 52:54:00:12:34:56
>> [    2.988871] e1000 0000:00:03.0: eth0: Intel(R) PRO/1000 Network Connection
> just a guess: maybe it didn't freeze...it just display things but
> toward serial console.... for a test, I suggest (untested) to dump out
> -nographic and instead use buit in qemu serial console. Switch to it
> by pressing Ctrl-Alt-3 and see if there are message showing there...
>

Problem with booting using qemu

[Mulyadi Santosa]

Hi...

On Thu, Apr 14, 2011 at 09:49, Luis Cebamanos <luiceur@gmail.com> wrote:
> Hi,
>
> So the chain to boot would be something like :
>
> $ sudo qemu -m 512 -enable-kvm disk.img -append
> "console=ttyS0 root=/dev/sda1 ro" -kernel bzImage -initrd
> initrd.img-2.6.37

I think so...let's see if that works for the original poster's problem...

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

Problem with booting using qemu

[Minwoo Lee]

Hi, Mulyadi and Luis.
Your suggestion is correct. Thank you.
It just display things but not toward serial.

Could I ask you about one more question?
I want to use serial for login and doing some command in shell.
I found that it is about /etc/init and getty, but I just found the solution
with /etc/inittab (I knew it is for old version).


2011/4/14 Mulyadi Santosa <mulyadi.santosa@gmail.com>

> Hi...
>
> On Thu, Apr 14, 2011 at 09:49, Luis Cebamanos <luiceur@gmail.com> wrote:
> > Hi,
> >
> > So the chain to boot would be something like :
> >
> > $ sudo qemu -m 512 -enable-kvm disk.img -append
> > "console=ttyS0 root=/dev/sda1 ro" -kernel bzImage -initrd
> > initrd.img-2.6.37
>
> I think so...let's see if that works for the original poster's problem...
>
> --
> regards,
>
> Mulyadi Santosa
> Freelance Linux trainer and consultant
>
> blog: the-hydra.blogspot.com
> training: mulyaditraining.blogspot.com
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
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Problem with booting using qemu

[Minwoo Lee]

Oh, I found it.

Thank you for replying my stupid questions.

This is the information about my question.
https://help.ubuntu.com/community/SerialConsoleHowto

<https://help.ubuntu.com/community/SerialConsoleHowto>

2011/4/15 Minwoo Lee <ermaker@gmail.com>

> Hi, Mulyadi and Luis.
> Your suggestion is correct. Thank you.
> It just display things but not toward serial.
>
> Could I ask you about one more question?
> I want to use serial for login and doing some command in shell.
> I found that it is about /etc/init and getty, but I just found the solution
> with /etc/inittab (I knew it is for old version).
>
>
> 2011/4/14 Mulyadi Santosa <mulyadi.santosa@gmail.com>
>
>> Hi...
>>
>> On Thu, Apr 14, 2011 at 09:49, Luis Cebamanos <luiceur@gmail.com> wrote:
>> > Hi,
>> >
>> > So the chain to boot would be something like :
>> >
>> > $ sudo qemu -m 512 -enable-kvm disk.img -append
>> > "console=ttyS0 root=/dev/sda1 ro" -kernel bzImage -initrd
>> > initrd.img-2.6.37
>>
>> I think so...let's see if that works for the original poster's problem...
>>
>> --
>> regards,
>>
>> Mulyadi Santosa
>> Freelance Linux trainer and consultant
>>
>> blog: the-hydra.blogspot.com
>> training: mulyaditraining.blogspot.com
>>
>> _______________________________________________
>> Kernelnewbies mailing list
>> Kernelnewbies at kernelnewbies.org
>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>
>
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Problem with booting using qemu

[Mulyadi Santosa]

On Thu, Apr 14, 2011 at 16:29, Minwoo Lee <ermaker@gmail.com> wrote:
> Oh, I found it.
> Thank you for replying my stupid questions.
> This is the information about my question.
> https://help.ubuntu.com/community/SerialConsoleHowto

Minwoo, I think qemu-devel is more appropriate forum to discuss this
qemu specific questions. We welcome you there :)

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com