From: Wei Yang <richard.weiyang@linux.alibaba.com>
To: paulmck@kernel.org, josh@joshtriplett.org, rostedt@goodmis.org,
mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com,
joel@joelfernandes.org, trivial@kernel.org
Cc: rcu@vger.kernel.org, linux-kernel@vger.kernel.org,
Wei Yang <richard.weiyang@linux.alibaba.com>
Subject: [PATCH 2/4] rcu: grplo/grphi just records CPU number
Date: Fri, 12 Jun 2020 10:07:53 +0800 [thread overview]
Message-ID: <20200612020755.50526-3-richard.weiyang@linux.alibaba.com> (raw)
In-Reply-To: <20200612020755.50526-1-richard.weiyang@linux.alibaba.com>
We store lowest and highest CPU number belongs to a rcu_node, which is
not the group number.
Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
---
kernel/rcu/tree.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index ed9b534ad870..ce9ab7371706 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -73,8 +73,8 @@ struct rcu_node {
unsigned long ffmask; /* Fully functional CPUs. */
unsigned long grpmask; /* Mask to apply to parent qsmask. */
/* Only one bit will be set in this mask. */
- int grplo; /* lowest-numbered CPU or group here. */
- int grphi; /* highest-numbered CPU or group here. */
+ int grplo; /* lowest-numbered CPU here. */
+ int grphi; /* highest-numbered CPU here. */
u8 grpnum; /* CPU/group number for next level up. */
u8 level; /* root is at level 0. */
bool wait_blkd_tasks;/* Necessary to wait for blocked tasks to */
--
2.20.1 (Apple Git-117)
next prev parent reply other threads:[~2020-06-12 2:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-12 2:07 [PATCH 0/4] rcu: trivial adjust for comments Wei Yang
2020-06-12 2:07 ` [PATCH 1/4] rcu: gp_max is protected by root rcu_node's lock Wei Yang
2020-06-12 2:07 ` Wei Yang [this message]
2020-06-12 2:07 ` [PATCH 3/4] rcu: grpnum just records group number Wei Yang
2020-06-12 2:07 ` [PATCH 4/4] rcu: use gp_seq instead of rcu_gp_seq for consistency Wei Yang
2020-06-12 14:12 ` Paul E. McKenney
2020-06-12 22:10 ` Wei Yang
2020-06-12 23:17 ` Paul E. McKenney
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