From: Joel Savitz <jsavitz@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Joel Savitz <jsavitz@redhat.com>,
Jonathan Corbet <corbet@lwn.net>,
Andrew Morton <akpm@linux-foundation.org>,
Huang Ying <ying.huang@intel.com>,
Eric Biggers <ebiggers@google.com>,
Dominik Brodowski <linux@dominikbrodowski.net>,
Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Rob Herring <robh@kernel.org>, Wang Qing <wangqing@vivo.com>,
linux-doc@vger.kernel.org
Subject: [PATCH] Documentation/sysctl: document max_rcu_stall_to_panic
Date: Thu, 24 Mar 2022 18:11:56 -0400 [thread overview]
Message-ID: <20220324221156.44813-1-jsavitz@redhat.com> (raw)
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>
---
Documentation/admin-guide/sysctl/kernel.rst | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index 803c60bf21d3..4e48139b9a34 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -781,6 +781,13 @@ 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
=========================
--
2.27.0
next reply other threads:[~2022-03-24 22:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-24 22:11 Joel Savitz [this message]
2022-04-21 19:24 ` [PATCH] Documentation/sysctl: document max_rcu_stall_to_panic Joel Savitz
2022-04-28 18:39 ` Jonathan Corbet
2022-04-28 18:49 ` Paul E. McKenney
2022-05-01 23:15 ` Jonathan Corbet
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