Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752595AbYKQVJk (ORCPT ); Mon, 17 Nov 2008 16:09:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754772AbYKQVFA (ORCPT ); Mon, 17 Nov 2008 16:05:00 -0500 Received: from gw1.cosmosbay.com ([86.65.150.130]:47081 "EHLO gw1.cosmosbay.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754724AbYKQVEy convert rfc822-to-8bit (ORCPT ); Mon, 17 Nov 2008 16:04:54 -0500 Message-ID: <4921DC61.4000702@cosmosbay.com> Date: Mon, 17 Nov 2008 22:04:33 +0100 From: Eric Dumazet User-Agent: Thunderbird 2.0.0.17 (Windows/20080914) MIME-Version: 1.0 To: Ingo Molnar CC: Linus Torvalds , David Miller , rjw@sisk.pl, linux-kernel@vger.kernel.org, kernel-testers@vger.kernel.org, cl@linux-foundation.org, efault@gmx.de, a.p.zijlstra@chello.nl, Stephen Hemminger Subject: Re: skb_release_head_state(): Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 References: <20081117110119.GL28786@elte.hu> <4921539B.2000002@cosmosbay.com> <20081117161135.GE12081@elte.hu> <49219D36.5020801@cosmosbay.com> <20081117170844.GJ12081@elte.hu> <20081117172549.GA27974@elte.hu> <4921AAD6.3010603@cosmosbay.com> <20081117182320.GA26844@elte.hu> <20081117184951.GA5585@elte.hu> <20081117205530.GE12020@elte.hu> In-Reply-To: <20081117205530.GE12020@elte.hu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8BIT X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-1.6 (gw1.cosmosbay.com [0.0.0.0]); Mon, 17 Nov 2008 22:04:37 +0100 (CET) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 977 Lines: 31 Ingo Molnar a ?crit : > (gdb) list *0xffffffff8048942e > 0xffffffff8048942e is in skb_release_head_state (include/linux/skbuff.h:1783). > 1778 } > 1779 #endif > 1780 #ifdef CONFIG_BRIDGE_NETFILTER > 1781 static inline void nf_bridge_put(struct nf_bridge_info *nf_bridge) > 1782 { > 1783 if (nf_bridge && atomic_dec_and_test(&nf_bridge->use)) > 1784 kfree(nf_bridge); > 1785 } > 1786 static inline void nf_bridge_get(struct nf_bridge_info *nf_bridge) > 1787 { > > and ouch does that global dec on &nf_bridge->use hurt! > > i do have: > > CONFIG_BRIDGE_NETFILTER=y > > (this is a Fedora distro kernel derived .config) Hum, you also should hit this cache line at atomic_inc() site then... Strange, I never caught this one. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/