From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_NEOMUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F09E1C10F11 for ; Mon, 22 Apr 2019 17:27:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BE186214AE for ; Mon, 22 Apr 2019 17:27:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727862AbfDVR1f (ORCPT ); Mon, 22 Apr 2019 13:27:35 -0400 Received: from Chamillionaire.breakpoint.cc ([146.0.238.67]:52046 "EHLO Chamillionaire.breakpoint.cc" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726587AbfDVR1f (ORCPT ); Mon, 22 Apr 2019 13:27:35 -0400 Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.89) (envelope-from ) id 1hIcj6-0002Na-KD; Mon, 22 Apr 2019 19:27:32 +0200 Date: Mon, 22 Apr 2019 19:27:32 +0200 From: Florian Westphal To: Andreas Hartmann Cc: Florian Westphal , Pablo Neira Ayuso , linux-kernel@vger.kernel.org Subject: Re: [PATCH 4.19 13/99] netfilter: nf_conncount: fix argument order to find_next_bit Message-ID: <20190422172732.sneybhuwrreb7g2u@breakpoint.cc> References: <20190121134913.924726465@linuxfoundation.org> <20190121134914.421023706@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andreas Hartmann wrote: > Since 4.19.17, I'm facing problems during streaming of videos I've never seen before. This means: > > - video from internet stutters although enough data flow can be seen in bmon. > - gpu is locked: > radeon 0000:0a:00.0: ring 0 stalled for more than 14084msec > radeon 0000:0a:00.0: GPU lockup (current fence id 0x0000000000053ed7 last fence id 0x0000000000053f0f on ring 0) > - The connection of videos streamed locally by the machine for a TV suddenly breaks (upnp - serviio as server). > > After very long time of testing, I detected, that removing the complete patch series for 4.19.17 regarding netfilter: nf_conncount makes the problem disappear. > > Please remove / fix this patchset! The state in 4.19.y is same as in mainline. Could you at least tell us how you're using nf_conncount (nf/iptables rules)? Could you test with debugging (KASAN, CONFIG_PROVE_RCU etc). enabled? I'm really surprised about this report, before the backport nf_conncount caused frequent kernel crashes, how does reverting even work...?