diff options
| author | Wang Qing <wangqing@vivo.com> | 2021-03-15 17:49:03 +0800 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2021-03-31 14:32:02 -0600 |
| commit | c5c1c700e2ea06f27ef3174387b412151ae0b395 (patch) | |
| tree | 4573f08ee2dff5a4a9aeb98fe4c0ed384da9b51d | |
| parent | 8be594b22adfbc1132bc12c76215160a67931e0c (diff) | |
doc: admin-guide: remove explanation of "watchdog/%u"
"watchdog/%u" threads has be replaced by cpu_stop_work,
which will mislead the reader.
Signed-off-by: Wang Qing <wangqing@vivo.com>
Link: https://lore.kernel.org/r/1615801744-31548-1-git-send-email-wangqing@vivo.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| -rw-r--r-- | Documentation/admin-guide/kernel-per-CPU-kthreads.rst | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/Documentation/admin-guide/kernel-per-CPU-kthreads.rst b/Documentation/admin-guide/kernel-per-CPU-kthreads.rst index 531f689311f2..5e51ee5b0358 100644 --- a/Documentation/admin-guide/kernel-per-CPU-kthreads.rst +++ b/Documentation/admin-guide/kernel-per-CPU-kthreads.rst @@ -332,23 +332,3 @@ To reduce its OS jitter, do at least one of the following: kthreads from being created in the first place. However, please note that this will not eliminate OS jitter, but will instead shift it to RCU_SOFTIRQ. - -Name: - watchdog/%u - -Purpose: - Detect software lockups on each CPU. - -To reduce its OS jitter, do at least one of the following: - -1. Build with CONFIG_LOCKUP_DETECTOR=n, which will prevent these - kthreads from being created in the first place. -2. Boot with "nosoftlockup=0", which will also prevent these kthreads - from being created. Other related watchdog and softlockup boot - parameters may be found in Documentation/admin-guide/kernel-parameters.rst - and Documentation/watchdog/watchdog-parameters.rst. -3. Echo a zero to /proc/sys/kernel/watchdog to disable the - watchdog timer. -4. Echo a large number of /proc/sys/kernel/watchdog_thresh in - order to reduce the frequency of OS jitter due to the watchdog - timer down to a level that is acceptable for your workload. |