From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754945Ab3I3Lnj (ORCPT ); Mon, 30 Sep 2013 07:43:39 -0400 Received: from mail2-relais-roc.national.inria.fr ([192.134.164.83]:36011 "EHLO mail2-relais-roc.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753413Ab3I3Lni (ORCPT ); Mon, 30 Sep 2013 07:43:38 -0400 X-IronPort-AV: E=Sophos;i="4.90,1007,1371074400"; d="scan'208";a="34894455" Date: Mon, 30 Sep 2013 13:43:35 +0200 (CEST) From: Julia Lawall X-X-Sender: jll@localhost6.localdomain6 To: "Ruslan N. Marchenko" cc: linux-kernel@vger.kernel.org Subject: Re: [BUG] Regression in 2fdac010 drivers/net/ethernet/via/via-velocity.c: update napi implementation In-Reply-To: <20130930071531.GA13037@ruff.mobi> Message-ID: References: <20130930071531.GA13037@ruff.mobi> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 30 Sep 2013, Ruslan N. Marchenko wrote: > Hi Julia et al., > > With this commit VIA NANO board get CPU lockup in random places on any network activity. > The error is random, most of the times dead locked CPU on boot. > > After loading via-velocity module it hangs for a while and then spits kernel mesages > about hanged tasks from varios places - like ata, rcu_preempt or network stack. > Also, if you boot the box with network disconnected - it works, until you plug the network cable. > > On some kernel builds (like ubuntu stock) behaviour varies, sometimes the box itself works, > but network stack dies after multiple ICMPv6 skb errors, so box ends up with network disconnected. > Reloading network susbsys helps to recover for some time (depending on how fast eth led is blinking). > > Reverting the patch allows me to boot without problems even from latest Linus trunk and send this mail. There has already been a discussion about this, and a patch has already been proposed. It has to do with lock managament. I will look for the email. julia