From: "Joel Fernandes (Google)" <joel@joelfernandes.org>
To: linux-kernel@vger.kernel.org
Cc: "Joel Fernandes (Google)" <joel@joelfernandes.org>,
Jonathan Corbet <corbet@lwn.net>,
Josh Triplett <josh@joshtriplett.org>,
Lai Jiangshan <jiangshanlai@gmail.com>,
linux-doc@vger.kernel.org,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
"Paul E. McKenney" <paulmck@linux.ibm.com>,
Steven Rostedt <rostedt@goodmis.org>
Subject: [1/5] doc: rcu: Update information about resched_cpu
Date: Tue, 25 Sep 2018 11:25:57 -0700 [thread overview]
Message-ID: <20180925182601.37421-2-joel@joelfernandes.org> (raw)
In-Reply-To: <20180925182601.37421-1-joel@joelfernandes.org>
Since commit fced9c8cfe6b ("rcu: Avoid resched_cpu() when rescheduling
the current CPU"), resched_cpu is not directly called from
sync_sched_exp_handler. Update the documentation about the same.
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
.../Expedited-Grace-Periods/Expedited-Grace-Periods.html | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html b/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html
index e62c7c34a369..8e4f873b979f 100644
--- a/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html
@@ -160,9 +160,9 @@ was in flight.
If the CPU is idle, then <tt>sync_sched_exp_handler()</tt> reports
the quiescent state.
-<p>
-Otherwise, the handler invokes <tt>resched_cpu()</tt>, which forces
-a future context switch.
+<p> Otherwise, the handler forces a future context switch by setting the
+NEED_RESCHED flag of the current task's thread flag and the CPU preempt
+counter.
At the time of the context switch, the CPU reports the quiescent state.
Should the CPU go offline first, it will report the quiescent state
at that time.
--
2.19.0.444.g18242da7ef-goog
next prev parent reply other threads:[~2018-09-25 18:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-25 18:25 [0/5] rcu doc updates Joel Fernandes (Google)
2018-09-25 18:25 ` Joel Fernandes (Google) [this message]
2018-09-25 18:25 ` [2/5] doc: rcu: Remove rcu_dynticks from Data-Structures Joel Fernandes (Google)
2018-09-25 18:25 ` [3/5] doc: rcu: Update Data-Structures for RCU flavor consolidation Joel Fernandes (Google)
2018-09-25 18:26 ` [4/5] doc: rcu: Clarify better the rcu_segcblist len field Joel Fernandes (Google)
2018-09-25 18:26 ` [5/5] doc: rcu: Update description of gp_seq fields in rcu_data Joel Fernandes (Google)
2018-09-25 18:48 ` [0/5] rcu doc updates Joel Fernandes
2018-09-25 18:49 ` Joel Fernandes
2018-09-26 23:47 ` Paul E. McKenney
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=20180925182601.37421-2-joel@joelfernandes.org \
--to=joel@joelfernandes.org \
--cc=corbet@lwn.net \
--cc=jiangshanlai@gmail.com \
--cc=josh@joshtriplett.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mathieu.desnoyers@efficios.com \
--cc=paulmck@linux.ibm.com \
--cc=rostedt@goodmis.org \
/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;
as well as URLs for NNTP newsgroup(s).