[LEDE-DEV] procd: cherry-pick kernel watchdog start/stop to lede-17.01 branch

[Philip Prindeville]

> On Jul 12, 2017, at 12:24 PM, Matthias Schiffer <mschiffer at universe-factory.net> wrote:
> 
> On 07/12/2017 08:02 PM, Philip Prindeville wrote:
>> 
>>> On Jul 11, 2017, at 3:19 AM, Hans Dedecker <dedeckeh at gmail.com> wrote:
>>> 
>>> Hi,
>>> 
>>> I would like to cherry-pick the start/stop kernel watchdog support to
>>> the lede-17.01 procd branch :
>>> 
>>> e5e99c4 watchdog: add support for starting/stopping kernel watchdog
>>> 
>>> It allows to gracefully stop the kernel watchdog via ubus which was
>>> before not possible as only the user space watchdog kicking could be
>>> stopped.
>>> 
>>> If nobody objects within the next few days I will take it as a passive
>>> consensus and update the procd lede-17.01 branch and the procd package
>>> Makefile in the lede-17.01 branch.
>>> 
>>> Thx,
>>> Hans
>> 
>> 
>> Hi Hans!
>> 
>> I’ve not been following this too closely, so forgive me if the question is a bit naive.
>> 
>> Since the sysupgrade process involves replacing procd now, would the watchdog need to be stopped as procd exits so that the hardware doesn’t reset itself during a particularly length update?  Let’s say you have a large FLASH with slow write times… that could take a long time and I don’t want a hardware watchdog thinking that the system has hung…
>> 
>> Thanks,
>> 
>> -Philip
>> 
> 
> Hi,
> the watchdog file descriptor is passed from procd to upgraded, which will
> continue to trigger the watchdog during the upgrade.
> 
> Matthias


Awesome, thank you!