lkml.org 
[lkml]   [2021]   [Jun]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip: core/rcu] rcu/nocb: Delete bypass_timer upon nocb_gp wakeup
The following commit has been merged into the core/rcu branch of tip:

Commit-ID: 3b2348e2fdf403b25a317b394db605257f321966
Gitweb: https://git.kernel.org/tip/3b2348e2fdf403b25a317b394db605257f321966
Author: Frederic Weisbecker <frederic@kernel.org>
AuthorDate: Tue, 23 Feb 2021 01:10:08 +01:00
Committer: Paul E. McKenney <paulmck@kernel.org>
CommitterDate: Wed, 12 May 2021 12:10:23 -07:00

rcu/nocb: Delete bypass_timer upon nocb_gp wakeup

A NOCB-gp wake p can safely delete the ->nocb_bypass_timer because
nocb_gp_wait() will recheck again the bypass state and rearm the bypass
timer if necessary. This commit therefore deletes this timer.

Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Neeraj Upadhyay <neeraju@codeaurora.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/rcu/tree_plugin.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index a667551..4253a0e 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1701,6 +1701,8 @@ static bool __wake_nocb_gp(struct rcu_data *rdp_gp,
del_timer(&rdp_gp->nocb_timer);
}

+ del_timer(&rdp_gp->nocb_bypass_timer);
+
if (force || READ_ONCE(rdp_gp->nocb_gp_sleep)) {
WRITE_ONCE(rdp_gp->nocb_gp_sleep, false);
needwake = true;
\
 
 \ /
  Last update: 2021-06-30 15:48    [W:0.029 / U:0.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site