linux-kernel - Re: [PATCH] rcu: avoid data-race in rcu_gp_fqs_check

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Date:   Wed, 9 Oct 2019 21:12:46 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     paulmck@...nel.org
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Eric Dumazet <eric.dumazet@...il.com>,
        syzbot <syzkaller@...glegroups.com>
Subject: Re: [PATCH] rcu: avoid data-race in rcu_gp_fqs_check_wake()

On Wed, Oct 9, 2019 at 8:18 PM Paul E. McKenney <paulmck@...nel.org> wrote:

> Again, good catch, applied for review and testing, thank you!
>
> I added another READ_ONCE() to dump_blkd_tasks(), which is not exercised
> unless you get an RCU CPU stall warning or some such.  The updated patch
> is below, please let me know if I messed anything up.
>
>                                                         Thanx, Paul

This looks good to me, thanks Paul.