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ipmi watchdog : add panic_wdt_timeout parameter

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In order to allow panic actions to be processed, the ipmi watchdog
driver sets a new timeout value on panic. The 255s timeout
was designed to allow kdump and others actions on panic, as in
http://lkml.iu.edu/hypermail/linux/kernel/0711.3/0258.html

This is counter-intuitive for a end-user who sets watchdog timeout
value to something like 30s and who expects BMC to reset the system
within 30s of a panic.

This commit allows user to configure the timeout on panic.

Signed-off-by: Jean-Yves Faye <[email protected]>
Signed-off-by: Corey Minyard <[email protected]>
This commit is contained in:
Jean-Yves Faye 2015-09-29 11:39:19 +02:00 • committed by Corey Minyard
commit c7f42c6390
2 changed files with 12 additions and 3 deletions
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8
drivers/char/ipmi/ipmi_watchdog.c
View file

@ -153,6 +153,9 @@ static int timeout = 10;
/* The pre-timeout is disabled by default. */
static int pretimeout;
/* Default timeout to set on panic */
static int panic_wdt_timeout = 255;
/* Default action is to reset the board on a timeout. */
static unsigned char action_val = WDOG_TIMEOUT_RESET;
@ -293,6 +296,9 @@ MODULE_PARM_DESC(timeout, "Timeout value in seconds.");
module_param(pretimeout, timeout, 0644);
MODULE_PARM_DESC(pretimeout, "Pretimeout value in seconds.");
module_param(panic_wdt_timeout, timeout, 0644);
MODULE_PARM_DESC(timeout, "Timeout value on kernel panic in seconds.");
module_param_cb(action, &param_ops_str, action_op, 0644);
MODULE_PARM_DESC(action, "Timeout action. One of: "
"reset, none, power_cycle, power_off.");
@ -1189,7 +1195,7 @@ static int wdog_panic_handler(struct notifier_block *this,
/* Make sure we do this only once. */
panic_event_handled = 1;
timeout = 255;
timeout = panic_wdt_timeout;
pretimeout = 0;
panic_halt_ipmi_set_timeout();
}