Re: [B.A.T.M.A.N.] reboot sometimes doesn't work well

Gioacchino Mazzurco
2012-10-03T21:35:31Z

It seems that compiling with newer openwrt revisions happily the problem
is not happening anymore so probably it was not batman-adv related

Sorry for the inconvenient but the behavior was pretty the same the
other time

Anyway thanks for debugging suggestions!

On 10/02/12 11:42, Antonio Quartulli wrote:
> On Mon, Oct 01, 2012 at 07:21:01PM +0200, Gioacchino Mazzurco wrote:
>> reboot is called by a script called through ssh
>>
>>> does it reboot succesfully,
>> no it doesn't
>>
>>> or simply hangs in there, requiring a
>>> manual power cycle?
>> It hangs there but I lost connectivity the device became unreachable
>> from ipv4 and also ipv6, also link local ipv6 is gone :|
>
> well, what about removing the batman-adv module _before_ rebooting? In this way
> we can somehow move the problem.
>
> (remember to do not connect via the mesh when you do this :-P)
>
> ciao
>
>>
>>
>> On 10/01/12 15:39, Gui Iribarren wrote:
>>> On Mon, Oct 1, 2012 at 8:24 AM, Gioacchino Mazzurco <gio@eigenlab.org> wrote:
>>>> Hi all!
>>>>
>>>> Some times ago' in ninux Pisa we was experiencing kernel powering off
>>>> the machine caused by batman-adv, with ordex help we debugged what was
>>>> happening and the issue was solved bat that was possible because it was
>>>> happening on x86 computers ( with screen )
>>>>
>>>> Now it SEEMS the same is happening but on mips ( Ubiquity M devices )
>>>> but here i don't know how to make sure the problem is this, the symptoms
>>>> is exactly the same, someone have idea how to save the powering off
>>>> kernel output on some file so after detach/attach cable we can find what
>>>> happened ?
>>>
>>> Your best option is getting a serial cable; you *might* try in
>>> /etc/config/system to enable persistent syslog output, and make it
>>> write to the flash , but no guarantees you'll catch the kernel panic
>>> that way. Serial console definitely would.
>>>
>>> Does this happen every time?
>>>> "on powering off"
>>> you mean when you issue a "reboot" command through ssh, or what?
>>> does it reboot succesfully, or simply hangs in there, requiring a
>>> manual power cycle?
>>>
>>> We haven't come across anything similar, using this hardware:
>>> tl-mr3020, tl-mr3220, tl-mr3420, tl-wr842nd, ubnt bullet2 , ubnt bullet m2
>