Re: Halt problem

Re: Halt problem

[Alan Levy]

Shutdown is supposed to terminate all processes/threads so it's probably not about the watchdog daemon. It sounds more like the classic distro was disabling the hardware watchdog during shutdown and your new distro doesn't do that. Try comparing the kernel watchdog drivers in the two distros because that's the most likely culprit.

===
ALAN LEVY, Lead Consultant, Embedded Systems

Plextek Consulting, The Plextek Building, London Road, Great Chesterford, Saffron Walden, CB10 1NY, UK
T: +44 (0) 1799 533200    E: alan.levy@plextek.com  W: www.plextek.com


-----Original Message-----

>Date: Mon, 15 Jan 2018 16:39:40 +0100
>From: Ryan Meulenkamp <Ryan.Meulenkamp@nedap.com>
>To: yocto@yoctoproject.org
>Subject: [yocto] Halt problem
>Message-ID: <f635d9dd-76fb-fc81-5dc0-fda98d50f35e@nedap.com>
>Content-Type: text/plain; charset=utf-8; format=flowed
>
>Hi y'all,
>
>I ran into a problem using shutdown -h (or halt) on an openembedded-core
> (yocto) distro running on the Atmel at91sam9g45.
>
>We used to run an openembedded-classic (angstr?m) based OS with kernel version 2.6.35.14+. Here, halting the system would cause it to shutdown without resetting, or >turning the power off, to await a manual reset.
>
>Now we are building a new distro based on openembedded-core and yocto. 
>Halting the system now causes a watchdog intervention. I tried all different arguments for both the shutdown and the halt command. It looks if though the classic based >distro left the watchdog daemon running during a halt.
>
>What could be the cause of this problem? In what direction should I look (e.g. kernel config, sysvinit config, openembedded config, processor specific code etc.)?
>
>I'm not sure if this is the right mailing list to ask this question, but I guess one of you could point me in the right direction.
>
>Thanks in advance and kind regards,
>
>Ryan Meulenkamp

Re: Halt problem

[Ryan Meulenkamp]

Hi Alan,

On 01/16/2018 08:48 AM, Alan Levy wrote:
> Shutdown is supposed to terminate all processes/threads so it's probably not about the watchdog daemon. It sounds more like the classic distro was disabling the hardware watchdog during shutdown and your new distro doesn't do that. Try comparing the kernel watchdog drivers in the two distros because that's the most likely culprit.

I tried that, but I think the hardware watchdog can only be enabled on 
the at91sam9m10. I'll compare the drivers anyway.

Thanks, and with kind regards,

Ryan Meulenkamp

Re: Halt problem

[Khem Raj]

On 1/16/18 2:46 AM, Ryan Meulenkamp wrote:
> 
> Hi Alan,
> 
> On 01/16/2018 08:48 AM, Alan Levy wrote:
>> Shutdown is supposed to terminate all processes/threads so it's
>> probably not about the watchdog daemon. It sounds more like the
>> classic distro was disabling the hardware watchdog during shutdown and
>> your new distro doesn't do that. Try comparing the kernel watchdog
>> drivers in the two distros because that's the most likely culprit.
> 
> I tried that, but I think the hardware watchdog can only be enabled on
> the at91sam9m10. I'll compare the drivers anyway.

are you upgrading kernel as well as part of this ? if yes then which
version and see how it handles watchdog. Secondly, perhaps record the
shutdown sequence. that might give you more insights.

> 
> Thanks, and with kind regards,
> 
> Ryan Meulenkamp

Halt problem

[Ryan Meulenkamp]

Hi y'all,

I ran into a problem using shutdown -h (or halt) on an openembedded-core 
(yocto) distro running on the Atmel at91sam9g45.

We used to run an openembedded-classic (angström) based OS with kernel 
version 2.6.35.14+. Here, halting the system would cause it to shutdown 
without resetting, or turning the power off, to await a manual reset.

Now we are building a new distro based on openembedded-core and yocto. 
Halting the system now causes a watchdog intervention. I tried all 
different arguments for both the shutdown and the halt command. It looks 
if though the classic based distro left the watchdog daemon running 
during a halt.

What could be the cause of this problem? In what direction should I look 
(e.g. kernel config, sysvinit config, openembedded config, processor 
specific code etc.)?

I'm not sure if this is the right mailing list to ask this question, but 
I guess one of you could point me in the right direction.

Thanks in advance and kind regards,

Ryan Meulenkamp

halt problem

[Ryan Meulenkamp]

Hi y'all,

I ran into a problem using shutdown -h (or halt) on an openembedded-core 
(yocto) distro running on the Atmel at91sam9g45.

We used to run an openembedded-classic (angström) based OS with kernel 
version 2.6.35.14+. Here, halting the system would cause it to shutdown 
without resetting, or turning the power off, to await a manual reset.

Now we are building a new distro based on openembedded-core and yocto. 
Halting the system now causes a watchdog intervention. I tried all 
different arguments for both the shutdown and the halt command. It looks 
if though the classic based distro left the watchdog daemon running 
during a halt.

What could be the cause of this problem? In what direction should I look 
(e.g. kernel config, sysvinit config, openembedded config, processor 
specific code etc.)?

I'm not sure if this is the right mailing list to ask this question, but 
I guess one of you could point me in the right direction.

Thanks in advance and kind regards,

Ryan Meulenkamp