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Documentation/sysctl: document max_rcu_stall_to_panic

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commit dfe564045c ("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>
This commit is contained in:
Joel Savitz 2022-03-24 18:11:56 -04:00 committed by Jonathan Corbet
parent a477b94d65
commit 81c653659d
1 changed files with 7 additions and 0 deletions
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7
Documentation/admin-guide/sysctl/kernel.rst
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@ -783,6 +783,13 @@ is useful to define the root cause of RCU stalls using a vmcore.
1 panic() after printing RCU stall messages. 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 perf_cpu_time_max_percent
========================= =========================