From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755104Ab3I3Nye (ORCPT ); Mon, 30 Sep 2013 09:54:34 -0400 Received: from vex.ruff.mobi ([46.167.245.136]:55788 "EHLO vex.ruff.mobi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754343Ab3I3Nyd (ORCPT ); Mon, 30 Sep 2013 09:54:33 -0400 Date: Mon, 30 Sep 2013 15:54:27 +0200 From: "Ruslan N. Marchenko" To: Julia Lawall Cc: linux-kernel@vger.kernel.org Subject: Re: [BUG] Regression in 2fdac010 drivers/net/ethernet/via/via-velocity.c: update napi implementation Message-ID: <20130930135427.GA19660@ruff.mobi> Mail-Followup-To: Julia Lawall , linux-kernel@vger.kernel.org References: <20130930071531.GA13037@ruff.mobi> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Sep 30, 2013 at 01:54:06PM +0200, Julia Lawall wrote: > 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. > > You can find the discussion and improved patch in this thread: > > http://www.spinics.net/lists/netdev/msg251287.html > Bug - regression - Via velocity interface coming up freezes kernel > From: Dirk Kraft > Date: Sun, 22 Sep 2013 19:28:52 +0200 > > julia Oops, sorry, somehow I missed it even though 've been searching for via-velocity regression. Will give a try to new proposed patch as well. Thanks, Ruslan