From 4eec42f392043063d0f019640b4ccc2a45570002 Mon Sep 17 00:00:00 2001 From: Mandeep Singh Baines Date: Sun, 22 May 2011 22:10:23 -0700 Subject: watchdog: Change the default timeout and configure nmi watchdog period based on watchdog_thresh Before the conversion of the NMI watchdog to perf event, the watchdog timeout was 5 seconds. Now it is 60 seconds. For my particular application, netbooks, 5 seconds was a better timeout. With a short timeout, we catch faults earlier and are able to send back a panic. With a 60 second timeout, the user is unlikely to wait and will instead hit the power button, causing us to lose the panic info. This change configures the NMI period to watchdog_thresh and sets the softlockup_thresh to watchdog_thresh * 2. In addition, watchdog_thresh was reduced to 10 seconds as suggested by Ingo Molnar. Signed-off-by: Mandeep Singh Baines Cc: Marcin Slusarz Cc: Don Zickus Cc: Peter Zijlstra Cc: Frederic Weisbecker Link: http://lkml.kernel.org/r/1306127423-3347-4-git-send-email-msb@chromium.org Signed-off-by: Ingo Molnar LKML-Reference: <20110517071642.GF22305@elte.hu> --- include/linux/nmi.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/nmi.h b/include/linux/nmi.h index 5317b8b2198f..2d304efc89df 100644 --- a/include/linux/nmi.h +++ b/include/linux/nmi.h @@ -45,7 +45,7 @@ static inline bool trigger_all_cpu_backtrace(void) #ifdef CONFIG_LOCKUP_DETECTOR int hw_nmi_is_cpu_stuck(struct pt_regs *); -u64 hw_nmi_get_sample_period(void); +u64 hw_nmi_get_sample_period(int watchdog_thresh); extern int watchdog_enabled; extern int watchdog_thresh; struct ctl_table; -- cgit v1.2.3