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| author | Li Zefan <lizefan@huawei.com> | 2013-05-17 04:31:20 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-05-28 11:28:19 +0200 |
| commit | 08825c90af6e4bb902b3a51abb0ae6530199f682 (patch) | |
| tree | fc1dee42a4589eb4fd84f2f1b2bd00ad7471c725 /Documentation/sysctl/kernel.txt | |
| parent | watchdog: Disallow setting watchdog_thresh to -1 (diff) | |
| download | linux-08825c90af6e4bb902b3a51abb0ae6530199f682.tar.xz linux-08825c90af6e4bb902b3a51abb0ae6530199f682.zip | |
watchdog: Document watchdog_thresh sysctl
Signed-off-by: Li Zefan <lizefan@huawei.com>
Acked-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/51959678.6000802@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/sysctl/kernel.txt')
| -rw-r--r-- | Documentation/sysctl/kernel.txt | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index ccd42589e124..e8fabd6cda35 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -76,6 +76,7 @@ show up in /proc/sys/kernel: - tainted - threads-max - unknown_nmi_panic +- watchdog_thresh - version ============================================================== @@ -648,3 +649,16 @@ that time, kernel debugging information is displayed on console. NMI switch that most IA32 servers have fires unknown NMI up, for example. If a system hangs up, try pressing the NMI switch. + +============================================================== + +watchdog_thresh: + +This value can be used to control the frequency of hrtimer and NMI +events and the soft and hard lockup thresholds. The default threshold +is 10 seconds. + +The softlockup threshold is (2 * watchdog_thresh). Setting this +tunable to zero will disable lockup detection altogether. + +============================================================== |