linux-kernel - Re: [PATCH -rt] Revert "net: use synchronize_rcu

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Date:	Tue, 27 Oct 2015 07:18:01 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Josh Cartwright <joshc@...com>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	tglx@...utronix.de, bigeasy@...utronix.de,
	linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH -rt] Revert "net: use synchronize_rcu_expedited()"

On Tue, 2015-10-27 at 07:31 -0500, Josh Cartwright wrote:

> Okay, yes, I like the first suggestion better as well, I've included a
> patch below that does just that.  I hope you don't mind me turning it
> into a Suggested-by :).
> 
> Thanks for taking a look!
>   Josh


> @@ -6969,7 +6969,7 @@ EXPORT_SYMBOL(free_netdev);
>  void synchronize_net(void)
>  {
>  	might_sleep();
> -	if (rtnl_is_locked())
> +	if (rtnl_is_locked() && !IS_ENABLED(CONFIG_PREEMPT_RT_FULL))
>  		synchronize_rcu_expedited();
>  	else
>  		synchronize_rcu();

No objection from me. Thanks.

Acked-by: Eric Dumazet <edumazet@...gle.com>


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