netdev - Re: [RFC] lockdep warning in gen_kill

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Message-ID: <1283973783.2428.11.camel@edumazet-laptop>
Date:	Wed, 08 Sep 2010 21:23:03 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [RFC] lockdep warning in gen_kill_estimator

Le mercredi 08 septembre 2010 à 12:16 -0700, Stephen Hemminger a écrit :

> But that commit adds unnecessary bh_disable
> -------

Yes I mentioned it in the original patch discussion


> Subject: [PATCH] pkt_sched: remov unnecessary bh_disable
> 
> Now that est_tree_lock is acquired with BH protection, the other
> call is unnecessary.
> 
> Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
> 
> --- a/net/core/gen_estimator.c	2010-09-08 12:13:55.182851300 -0700
> +++ b/net/core/gen_estimator.c	2010-09-08 12:14:07.401063663 -0700
> @@ -274,9 +274,9 @@ void gen_kill_estimator(struct gnet_stat
>  	while ((e = gen_find_node(bstats, rate_est))) {
>  		rb_erase(&e->node, &est_root);
>  
> -		write_lock_bh(&est_lock);
> +		write_lock(&est_lock);
>  		e->bstats = NULL;
> -		write_unlock_bh(&est_lock);
> +		write_unlock(&est_lock);
>  
>  		list_del_rcu(&e->list);
>  		call_rcu(&e->e_rcu, __gen_kill_estimator);
> 
> 
> 


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