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authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-10 13:46:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-10 13:46:08 -0700
commit077d3dafe63cb26653f2b171fa102dbefd242fa8 (patch)
tree69f57b478c9ff6ce3b86c340ae4ebb2e27b44716
parentdbbdf54c7206bf3f201f9ddaa5f4dd87835271cc (diff)
parent11295055526308ee71d82dc97f0a9ca2dd61c3b9 (diff)
Merge branch 'core-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull watchdog core update from Thomas Gleixner: "A single commit adding a command line parameter which allows to set the watchdog threshold on the kernel command-line, so kernels with massive debug facilities enabled won't trigger the watchdog during early boot and before the threshold can be changed via sysctl" * 'core-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: watchdog/core: Add watchdog_thresh command line parameter
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt8
-rw-r--r--kernel/watchdog.c7
2 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index aa4f4cfd0491..2b8ee90bb644 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5078,6 +5078,14 @@
or other driver-specific files in the
Documentation/watchdog/ directory.
+ watchdog_thresh=
+ [KNL]
+ Set the hard lockup detector stall duration
+ threshold in seconds. The soft lockup detector
+ threshold is set to twice the value. A value of 0
+ disables both lockup detectors. Default is 10
+ seconds.
+
workqueue.watchdog_thresh=
If CONFIG_WQ_WATCHDOG is configured, workqueue can
warn stall conditions and dump internal state to
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 977918d5d350..8fbfda94a67b 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -199,6 +199,13 @@ static int __init nosoftlockup_setup(char *str)
}
__setup("nosoftlockup", nosoftlockup_setup);
+static int __init watchdog_thresh_setup(char *str)
+{
+ get_option(&str, &watchdog_thresh);
+ return 1;
+}
+__setup("watchdog_thresh=", watchdog_thresh_setup);
+
#ifdef CONFIG_SMP
int __read_mostly sysctl_softlockup_all_cpu_backtrace;