(cc's added)
On Fri, 23 Nov 2007 20:28:41 -0800 (PST) [email protected] wrote:
> Build kernel-2.6.24-rc3. pmi_watchdog can not reset the kernel panic
> machine. The watchdog can never to record panic information to IPMI SEL.
>
> 1. I disable auto reset when kernel panic by echo "0" >
> /proc/sys/kernel/panic
>
> 2. modprobe ipmi_watchdog timeout=120 action=reset
>
> 3. Load a driver, the driver will call panic() when ioctl to call into
> the driver.
>
> 4. By ioctl call into the driver, panic the system.
>
> in wdog_panic_handler, I printk "ipmi_watchdog_state=WDOG_TIMEOUT_NONE"
> so, the watchdog can never to record panic information to IPMI SEL.
>
>
> static int wdog_panic_handler(struct notifier_block *this,
> unsigned long event,
> void *unused)
> {
> static int panic_event_handled = 0;
>
> /* On a panic, if we have a panic timeout, make sure to extend
> the watchdog timer to a reasonable value to complete the
> panic, if the watchdog timer is running. Plus the
> pretimeout is meaningless at panic time. */
> if (watchdog_user && !panic_event_handled &&
> ipmi_watchdog_state != WDOG_TIMEOUT_NONE) {
> /* Make sure we do this only once. */
> panic_event_handled = 1;
>
> timeout = 255;
> pretimeout = 0;
> panic_halt_ipmi_set_timeout();
> }
>
> return NOTIFY_OK;
> }
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