RE: hardware watchdog reset during LKCD

["Tony Chung" <tchung@xxxxxxxxxxxxxxxxxxx>]

BTW, I forgot to mention it is 2.4.31 kernel and LKCD 4.1.1.
The comment in driver/dump/dump_base.c mentioned about problem in
dumping within interrupt handler.
Can someone give me an example?

In general, I heard about no sleeping in interrupt context. Is that
still true in 2.6 with preemptable kernel?
Thanks.

-----Original Message-----
From: kernelnewbies-bounce@xxxxxxxxxxxx
[mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On Behalf Of Tony Chung
Sent: Monday, December 25, 2006 9:52 AM
To: kernelnewbies
Subject: hardware watchdog reset during LKCD 

Hi All,

I try LKCD and it was working fine but when hardware watchdog is
enabled, it reset the system in the middle of crash dump.  This hardware
watchdog only allow a maximum of 60 seconds otherwise I will increase
the timeout.


I could modify the LKCD to stop the hardware watchdog but that may not a
good solution since there are so many types of hardware or even software
watchdog.  

Is there a way to notify a user daemon process to stop the hardware
watchdog?  I noticed the panic.c called notifier_call_chain(). How does
it work? Any hints or pointers?


Or is there a simple way to handle the watchdog reset problem?
Thanks.

- Tony



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