Re: [PATCH] rcu/sync: don't read rcu_sync->gp_count lockless

Subject: Re: [PATCH] rcu/sync: don't read rcu_sync->gp_count lockless
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Date: Sun, 12 May 2024 20:06:55 +0200
Cc: "Uladzislau Rezki (Sony)" <urezki@xxxxxxxxx>, RCU <rcu@xxxxxxxxxxxxxxx>, Neeraj upadhyay <Neeraj.Upadhyay@xxxxxxx>, Boqun Feng <boqun.feng@xxxxxxxxx>, Hillf Danton <hdanton@xxxxxxxx>, Joel Fernandes <joel@xxxxxxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Oleksiy Avramchenko <oleksiy.avramchenko@xxxxxxxx>, Frederic Weisbecker <frederic@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>
In-reply-to: <bbc3648c-0965-41d1-b245-3a4ca0c9629c@paulmck-laptop>
User-agent: Mutt/1.5.24 (2015-08-30)

On 05/12, Paul E. McKenney wrote:
>
> How about like this?

LGTM ;)

Oleg.

References:
- [PATCH 00/48] RCU changes for v6.10
  - From: Uladzislau Rezki (Sony)
- [PATCH 25/48] rcu: Mark writes to rcu_sync ->gp_count field
  - From: Uladzislau Rezki (Sony)
- [PATCH] rcu/sync: don't read rcu_sync->gp_count lockless
  - From: Oleg Nesterov
- Re: [PATCH] rcu/sync: don't read rcu_sync->gp_count lockless
  - From: Paul E. McKenney
- Re: [PATCH] rcu/sync: don't read rcu_sync->gp_count lockless
  - From: Oleg Nesterov
- Re: [PATCH] rcu/sync: don't read rcu_sync->gp_count lockless
  - From: Paul E. McKenney