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authorJoel Savitz <jsavitz@redhat.com>2022-03-25 01:11:56 +0300
committerJonathan Corbet <corbet@lwn.net>2022-05-02 02:14:09 +0300
commit81c653659d34ec253fba7f5d0f430813fe0f643d (patch)
treecbe04cabcd392bf3b1037b60961de62fb311f142 /Documentation/admin-guide
parenta477b94d657875c81775b7e5147fd2671ff25ce0 (diff)
downloadlinux-81c653659d34ec253fba7f5d0f430813fe0f643d.tar.xz
Documentation/sysctl: document max_rcu_stall_to_panic
commit dfe564045c65 ("rcu: Panic after fixed number of stalls") introduced a new systctl but no accompanying documentation. Add a simple entry to the documentation. Signed-off-by: Joel Savitz <jsavitz@redhat.com> Acked-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/admin-guide')
-rw-r--r--Documentation/admin-guide/sysctl/kernel.rst7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index 1144ea3229a3..545d2d7420a1 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -783,6 +783,13 @@ is useful to define the root cause of RCU stalls using a vmcore.
1 panic() after printing RCU stall messages.
= ============================================================
+max_rcu_stall_to_panic
+======================
+
+When ``panic_on_rcu_stall`` is set to 1, this value determines the
+number of times that RCU can stall before panic() is called.
+
+When ``panic_on_rcu_stall`` is set to 0, this value is has no effect.
perf_cpu_time_max_percent
=========================