"watchdog/%u" threads has be replaced by cpu_stop_work. The current description is extremely misleading, so delete the explanation about "watchdog/%u". Signed-off-by: Wang Qing <wangqing@xxxxxxxx> --- .../admin-guide/kernel-per-CPU-kthreads.rst | 20 -------------------- 1 file changed, 20 deletions(-) diff --git a/Documentation/admin-guide/kernel-per-CPU-kthreads.rst b/Documentation/admin-guide/kernel-per-CPU-kthreads.rst index 531f689..5e51ee5 --- 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. -- 2.7.4
