2001-12-11 13:05:14

by gspujar

[permalink] [raw]
Subject: Re: software watchdog: it works




Hi,
Thanks a lot for your help. I modified the softdog code and I get the message
logged in my log file on system reboot.

Thanks
Girish





Russell King <[email protected]> on 12/11/2001 05:20:59 PM

To: Girish S Pujar/HSS@HSS
cc: [email protected], Atul Chowdhry/HSS@HSS

Subject: Re: software watchdog




On Tue, Dec 11, 2001 at 04:26:07PM +0530, [email protected] wrote:
> Why is that the printk output not going to syslog although I have entry in
> /etc/syslog.conf
>
> kern.crit /var/log/pbsc.log
> even after I remove the mdelay call.

The machine reboots before syslog gets to run.

What happens is:

printk();
reboot();

During that period, syslog is unable to run, and therefore is unable to
write the log message to disk.

> Does it mean that without using "testing" mode ( I cannot beacuse I need a
> reboot) it is not possible to get log ?

I suppose you could modify softdog to delay the reboot using it's timer
(the timer fires the first time, you check data to see if it's non-zero.
If it's not, increment watchdog_ticktock.data, and set the watchdog to
timeout in 5 seconds, return).

You should probably prevent softdog_write updating the timer if the
data field is non-zero, so once you don't change the behaviour; this
is of course dependent on your test case.

--
Russell King ([email protected]) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html