From: Joel Fernandes <joelagnelf@nvidia.com>
To: paulmck@kernel.org, rcu@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Frederic Weisbecker <frederic@kernel.org>,
Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
Boqun Feng <boqun@kernel.org>,
Joel Fernandes <joelagnelf@nvidia.com>,
Josh Triplett <josh@joshtriplett.org>,
Uladzislau Rezki <urezki@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Zqiang <qiang.zhang@linux.dev>,
Davidlohr Bueso <dave@stgolabs.net>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: [PATCH RFC 6/7] doc: Document rcutree.boost_disable
Date: Wed, 11 Nov 2026 16:38:24 -0500 [thread overview]
Message-ID: <20261111213826.2035045-7-joelagnelf@nvidia.com> (raw)
In-Reply-To: <20261111213826.2035045-1-joelagnelf@nvidia.com>
Add the new rcutree.boost_disable parameter to kernel-parameters.txt.
Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
---
Documentation/admin-guide/kernel-parameters.txt | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index ac97cbd98b46..8f91499b3488 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5651,6 +5651,13 @@ Kernel parameters
Set maximum number of finished RCU callbacks to
process in one batch.
+ rcutree.boost_disable= [KNL]
+ Disable RCU priority boosting at runtime, even in
+ kernels built with CONFIG_RCU_BOOST=y. This is
+ for testing the boost tests, for example by the
+ rcutorture BUSTED-BOOST scenario, and should not
+ be used otherwise.
+
rcutree.csd_lock_suppress_rcu_stall= [KNL]
Do only a one-line RCU CPU stall warning when
there is an ongoing too-long CSD-lock wait.
--
2.54.0
next prev parent reply other threads:[~2026-11-11 21:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-11 21:38 [PATCH RFC 0/7] rcutorture: Rewrite RCU priority-boost test around a CPU-hungry reader Joel Fernandes
2026-11-11 21:38 ` [PATCH RFC 1/7] " Joel Fernandes
2026-11-11 21:38 ` [PATCH RFC 2/7] rcutorture: Stop disabling RT throttling for boost testing Joel Fernandes
2026-11-11 21:38 ` [PATCH RFC 3/7] rcutorture: Remove unused check_boost_failed hook Joel Fernandes
2026-11-11 21:38 ` [PATCH RFC 4/7] doc: Document rcutorture.test_boost_reader_ms Joel Fernandes
2026-11-11 21:38 ` [PATCH RFC 5/7] rcu: Add rcutree.boost_disable to disable priority boosting at runtime Joel Fernandes
2026-11-11 21:38 ` Joel Fernandes [this message]
2026-11-11 21:38 ` [PATCH RFC 7/7] rcutorture: Make BUSTED-BOOST disable RCU priority boosting Joel Fernandes
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20261111213826.2035045-7-joelagnelf@nvidia.com \
--to=joelagnelf@nvidia.com \
--cc=bigeasy@linutronix.de \
--cc=boqun@kernel.org \
--cc=corbet@lwn.net \
--cc=dave@stgolabs.net \
--cc=frederic@kernel.org \
--cc=jiangshanlai@gmail.com \
--cc=josh@joshtriplett.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=mathieu.desnoyers@efficios.com \
--cc=neeraj.upadhyay@kernel.org \
--cc=paulmck@kernel.org \
--cc=qiang.zhang@linux.dev \
--cc=rcu@vger.kernel.org \
--cc=rostedt@goodmis.org \
--cc=skhan@linuxfoundation.org \
--cc=urezki@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®