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| author |   Paul E. McKenney <paulmck@linux.ibm.com> | 2019-06-13 15:30:49 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-08-01 14:05:51 -0700 |
| commit | cdc694b2359d52cd6d0465d5a6263d97c786fb0c (patch) | |
| tree | b23b91ce2d46cfbbb52f2bcd546cc1c471adb662 /Documentation/admin-guide/kernel-parameters.txt | |
| parent | rcu: Restore barrier() to rcu_read_lock() and rcu_read_unlock() (diff) | |
| download | linux-dev-cdc694b2359d52cd6d0465d5a6263d97c786fb0c.tar.xz linux-dev-cdc694b2359d52cd6d0465d5a6263d97c786fb0c.zip | |
rcu: Add kernel parameter to dump trace after RCU CPU stall warning
This commit adds a rcu_cpu_stall_ftrace_dump kernel boot parameter, that,
when set, causes the trace buffer to be dumped after an RCU CPU stall
warning is printed. This kernel boot parameter is disabled by default,
maintaining compatibility with previous behavior.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 7ccd158b3894..f3fcd6140ee1 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4047,6 +4047,10 @@ rcutorture.verbose= [KNL] Enable additional printk() statements. + rcupdate.rcu_cpu_stall_ftrace_dump= [KNL] + Dump ftrace buffer after reporting RCU CPU + stall warning. + rcupdate.rcu_cpu_stall_suppress= [KNL] Suppress RCU CPU stall warning messages. |