netdev - Re: [net-next PATCH 3/3] net: frag queue per hash bucket locking

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Message-ID: <1364513982.15753.57.camel@edumazet-glaptop>
Date:	Thu, 28 Mar 2013 16:39:42 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	Jesper Dangaard Brouer <brouer@...hat.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Florian Westphal <fw@...len.de>,
	Daniel Borkmann <dborkman@...hat.com>
Subject: Re: [net-next PATCH 3/3] net: frag queue per hash bucket locking

On Fri, 2013-03-29 at 00:30 +0100, Hannes Frederic Sowa wrote:
> On Thu, Mar 28, 2013 at 01:22:44PM -0700, Eric Dumazet wrote:
> > On Thu, 2013-03-28 at 19:57 +0100, Hannes Frederic Sowa wrote:
> > 
> > > I assume that it has to do with the usage of this code in
> > > ipv6/netfilter/nf_conntrack_reasm.c, which could be invoked from process
> > > context, if I read it correctly.
> > 
> > Then there would be a possible deadlock in current code.
> 
> Netfilter currently does a local_bh_disable() before entering inet_fragment
> (and later enables it, again).
> 

Good, so no need for the _bh() as I suspected.


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