linux-kernel - Re: [PATCH RFC] rcu/kfree: Do not request RCU when not needed

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Message-ID: <Y2KpMFrtwG+D4YRB@pc636>
Date:   Wed, 2 Nov 2022 18:30:24 +0100
From:   Uladzislau Rezki <urezki@...il.com>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     "Paul E. McKenney" <paulmck@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>, rcu@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC] rcu/kfree: Do not request RCU when not needed

> 
> to wait for a GP. Or if the poll_state_synchronize_rcu(oldstate)) != 0
> queue_rcu_work().
> 
A small fix. If poll_state_synchronize_rcu(oldstate)) == 0 then
queue_rcu_work() since a GP is still in progress.