[yocto] kernel panic - not syncing: No init found

[Bruce Ashfield]

On 11-07-31 11:30 PM, Tom Zanussi wrote:
> On Sun, 2011-07-31 at 19:42 -0700, Bruce Ashfield wrote:
>> On 11-07-31 3:44 PM, Francis Meyvis wrote:
>>> Hello,
>>>
>>> I probably miss something trivial.
>>> I cloned the git://git.yoctoproject.org/poky.git
>>> I build on a 64 bit machine a qemux86-64
>>> (. ./oe-init-build-env qemux86-64 and changing the conf/local.conf)
>>> I build the core-image-sato&   core-image-minimal.
>>> Then I try to run with
>>> runqemu qemux86-64 core-image-sato ext3
>>>
>>> But both sato and minimal give me this message:
>>> Kernel panic - not syncing: No init found.
>>>
>>> As runqemu showed me the full command line I tried to add the --append
>>> command line option
>>> init=/sbin/init and /sbin/init.sysvinit
>>> But that did not help (there's a message saying Failed to execute
>>> /sbin/init. Attempting defaults...)
>>> I verified by mounting these ext3 images on a loop device that there's
>>> really a /sbin/init present.
>>>
>>> Can somebody tell what I'm doing wrong?
>>
>> Can you send a full bootlog, or paste it somewhere accessible ? It's hard
>> to say what's with the information you've given.
>>
>> Is this the latest yocto master ?
>>
>> If you are seeing that message it typically means that the the
>> device that is being used as the root isn't ready (fixed by
>> rootwait/rootdelay) or isn't supported (i.e. NFS root without
>> the right ethernet device). Changing what init is, won't change
>> the result if either one of those is the case.
>>
>
> I'm also seeing this on both sugarbay and jasperforest with the latest
> master.  rootwait doesn't help.
>
> rtc_cmos 00:07: setting system clock to 2010-01-02 05:35:34 UTC
> (1262410534)
> Freeing unused kernel memory: 720k freed
> Failed to execute /init
> Kernel panic - not syncing: No init found.  Try passing init= option to
> kernel.
> See Linux Documentation/init.txt for guidance.
> Pid: 1, comm: swapper Not tainted 3.0.0-rc7-yocto-standard+ #1
> Call Trace:
>   [<ffffffff81541b77>] panic+0x9b/0x191
>   [<ffffffff81540862>] init_post+0xc0/0xc0
>   [<ffffffff8188bcef>] kernel_init+0x17b/0x17b
>   [<ffffffff8154b234>] kernel_thread_helper+0x4/0x10
>   [<ffffffff8188bb74>] ? start_kernel+0x377/0x377
>   [<ffffffff8154b230>] ? gs_change+0xb/0xb
>
> I thought initially it had something to do with the -live image changes,
> but reverting the two -live patches didn't help.
>
> The problem seems to coincide with the tune file changes, but that may
> be a red herring.

Nope. I don't think it's a red herring:

Both of these:

   Freeing unused kernel memory: 720k freed
   Failed to execute /init

Indicate that the device came up and init was loaded, the kernel
passed control to userspace and then things went bad. i.e. you just
ran init of the wrong arch or something incompatible with the
kernel support, etc.

Since I'm having no trouble with old rootfs and new kernels, that's
another sign. I'm assuming that old userspace's boot for you ?

Bruce

>
> Tom
>
>
>> Cheers,
>>
>> Bruce
>>
>>>
>>> BTW is there any way to not have to run qemu with root permissions?
>>> I ran the android emulator and it does not require me to be root.
>>> Should I configure something on my Ubuntu machine to get qemu to function?
>>>
>>> Thanks,
>>> francis
>>> _______________________________________________
>>> yocto mailing list
>>> yocto at yoctoproject.org
>>> https://lists.yoctoproject.org/listinfo/yocto
>>
>> _______________________________________________
>> yocto mailing list
>> yocto at yoctoproject.org
>> https://lists.yoctoproject.org/listinfo/yocto
>
>