linux-kernel - Re: [PATCH RFC] rcu/segcblist: Add counters to segcblist datastructure

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Message-ID: <20200729123957.GC225345@google.com>
Date:   Wed, 29 Jul 2020 08:39:57 -0400
From:   Joel Fernandes <joel@...lfernandes.org>
To:     Davidlohr Bueso <dave@...olabs.net>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Josh Triplett <josh@...htriplett.org>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Marco Elver <elver@...gle.com>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        "Paul E. McKenney" <paulmck@...nel.org>, rcu@...r.kernel.org,
        Steven Rostedt <rostedt@...dmis.org>,
        "Uladzislau Rezki (Sony)" <urezki@...il.com>
Subject: Re: [PATCH RFC] rcu/segcblist: Add counters to segcblist
 datastructure

On Mon, Jul 20, 2020 at 07:29:23AM -0700, Davidlohr Bueso wrote:
> On Sat, 18 Jul 2020, Joel Fernandes (Google) wrote:
> 
> > +/* Move from's segment length to to's segment. */
> > +static void rcu_segcblist_move_seglen(struct rcu_segcblist *rsclp, int from, int to)
> > +{
> > +	long len = rcu_segcblist_get_seglen(rsclp, from);
> > +
> > +	if (!len || from == to)
> > +		return;
> 
> Nit: You probably wanna do the parameter sanity checks before the
> atomic_read.

Ok, I'll do that next revision. Thank you.

 - Joel