From mboxrd@z Thu Jan 1 00:00:00 1970 From: Denis Subject: Re: [PATCH] [NETFILTER] bridge: rcu_deref outside read-lock section Date: Tue, 14 Aug 2012 11:32:37 +0400 Message-ID: <5029FF15.4030903@gmail.com> References: <1344898062-23633-1-git-send-email-yefremov.denis@gmail.com> <20120813163641.69a8388a@nehalam.linuxnetplumber.net> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=zU1snSn/26IDJZICiQepFsfdFcq2JJiieF2kRrDGRFI=; b=o/ysFG3BjqWbroubPx8UKz6gNjSOSE2UzEIVZbrFXKmoqJPLkgWi1+sQjuWA9F+waG 9poLjFt/ZMzzpe0M4sbC7zBvTPCEBMtRw2X27GG2XTKJnYZvPfsJAVrgD0nd6NnK9aE2 hYBIX7YrTidBH2/8QQsrfOMn7LhoNMoMzR7YSR7MN5yJ/CCJ0Q3dMDTZwE1qs2NNwPBB VJuozkHIM3GG7x3v9N6woZqaOCsRcR0LOrnsOq3fdGkFqiYbqirP1iijtlYcyH4rzC4h qqfV6y5YorNfs7HraqP8VCcrGclhgQpzbUWoaDeR+UzXgqOlQKE+qa1642pGptHXiVmo dSqg== In-Reply-To: <20120813163641.69a8388a@nehalam.linuxnetplumber.net> Sender: netfilter-devel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Stephen Hemminger Cc: Pablo Neira Ayuso , Patrick McHardy , netfilter-devel@vger.kernel.org, netfilter@vger.kernel.org, coreteam@netfilter.org, linux-kernel@vger.kernel.org, ldv-project@ispras.ru On 14.08.2012 3:36, Stephen Hemminger wrote: > Why not just move the rcu_read_lock() in br_dev_xmit earlier? I don't know the semantics of this code, so it's difficult for me to choose the appropriate place. I thought that the callers of br_nf_pre_routing_finish_bridge_slow function are limited to br_dev_xmit and we can modify header without problems. Anyway, I will send another version of the patch.