Kenrel panic with 3.18.7-rt2 - rootfs at MMC

Kenrel panic with 3.18.7-rt2 - rootfs at MMC

[Ralf Mardorf]

On Fri, 6 Mar 2015 13:24:41 +0100, Sebastian Andrzej Siewior wrote:
>if the system is still responsible you could "dmesg > file" and then
>that file would interresting as long as there is no systemd crap in it.

That's the problem, the system isn't responsive anymore. There also is
no file /var/log/dmesg. I can reboot and run the dmesg command, but it
only shows the messages for the last boot.
I guess I'm a power user regarding several Linux things, but I'm
completely lost regarding some issues, since several distros switched
to systemd.

Kenrel panic with 3.18.7-rt2 - Was: Kenrel panic with 3.18.7-rt2 - rootfs at MMC

[Ralf Mardorf]

On Fri, 6 Mar 2015 17:43:36 +0100, Ralf Mardorf wrote:
>On Fri, 6 Mar 2015 13:24:41 +0100, Sebastian Andrzej Siewior wrote:
>>if the system is still responsible you could "dmesg > file" and then
>>that file would interresting as long as there is no systemd crap in
>>it.
>
>That's the problem, the system isn't responsive anymore. There also is
>no file /var/log/dmesg. I can reboot and run the dmesg command, but it
>only shows the messages for the last boot.
>I guess I'm a power user regarding several Linux things, but I'm
>completely lost regarding some issues, since several distros switched
>to systemd.

Sorry, I didn't keep the thread as wanted, but forgot to change the
subject. Fixed ;).

Re: Kenrel panic with 3.18.7-rt2 - Was: Kenrel panic with 3.18.7-rt2 - rootfs at MMC

[Sebastian Andrzej Siewior]

* Ralf Mardorf | 2015-03-06 17:47:00 [+0100]:

>On Fri, 6 Mar 2015 13:24:41 +0100, Sebastian Andrzej Siewior wrote:
>>if the system is still responsible you could "dmesg > file" and then
>>that file would interresting as long as there is no systemd crap in
>>it.
>
>That's the problem, the system isn't responsive anymore. There also is
>no file /var/log/dmesg. I can reboot and run the dmesg command, but it
>only shows the messages for the last boot.
So if you don't get the crash message anymore then it gets tricky. You
could use the serial console and read it there (if you have a serial
port and another machine). The other trick might be to use "printk
delay" and then memorize it or use a camera :)

Sebastian

Re: Kenrel panic with 3.18.7-rt2 - Was: Kenrel panic with 3.18.7-rt2 - rootfs at MMC

[Paul Gortmaker]

On Fri, Mar 6, 2015 at 11:47 AM, Ralf Mardorf
<ralf.mardorf@alice-dsl.net> wrote:
> On Fri, 6 Mar 2015 17:43:36 +0100, Ralf Mardorf wrote:
>>On Fri, 6 Mar 2015 13:24:41 +0100, Sebastian Andrzej Siewior wrote:
>>>if the system is still responsible you could "dmesg > file" and then
>>>that file would interresting as long as there is no systemd crap in
>>>it.
>>
>>That's the problem, the system isn't responsive anymore. There also is
>>no file /var/log/dmesg. I can reboot and run the dmesg command, but it
>>only shows the messages for the last boot.
>>I guess I'm a power user regarding several Linux things, but I'm
>>completely lost regarding some issues, since several distros switched
>>to systemd.

So I just did a quick test with 3.18.9-rt on an athlon x4 64 bit.
Did "make localyesconfig" - ensured RT_FULL was on and that
booted OK without any triple fault or similar.  So unless you can
capture some of the log with a camera or a serial port, it is hard
for us to help figure out what the problem is.

Paul.
--

>
> Sorry, I didn't keep the thread as wanted, but forgot to change the
> subject. Fixed ;).
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Re: Kenrel panic with 3.18.7-rt2 - Was: Kenrel panic with 3.18.7-rt2 - rootfs at MMC

[Ralf Mardorf]

On Fri, 13 Mar 2015 10:26:39 -0400, Paul Gortmaker wrote:
>unless you can capture some of the log with a camera

Hi,

in the meanwhile I noticed that 3.14.28-rt25 works on my machine and
3.14.34-rt31 already doesn't work on my machine.

Can I send a pic as attachment or should I paste a link?

Regards,
Ralf

Re: Kenrel panic with 3.18.7-rt2 - Was: Kenrel panic with 3.18.7-rt2 - rootfs at MMC

[Paul Gortmaker]

[Re: Kenrel panic with 3.18.7-rt2 - Was: Kenrel panic with 3.18.7-rt2 - rootfs at MMC] On 13/03/2015 (Fri 16:26) Ralf Mardorf wrote:

> On Fri, 13 Mar 2015 10:26:39 -0400, Paul Gortmaker wrote:
> >unless you can capture some of the log with a camera
> 
> Hi,
> 
> in the meanwhile I noticed that 3.14.28-rt25 works on my machine and
> 3.14.34-rt31 already doesn't work on my machine.

Not a lot changed in there ; mostly stable merges, so if you could test
the interim points, that might give a clue as to what happened.

> 
> Can I send a pic as attachment or should I paste a link?

Not sure the list will pass through an attachment that isn't just a
plain text patch or similar; you might need a link instead.

P.
--

> 
> Regards,
> Ralf