Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754600Ab2KESBJ (ORCPT ); Mon, 5 Nov 2012 13:01:09 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:37632 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932103Ab2KESBC (ORCPT ); Mon, 5 Nov 2012 13:01:02 -0500 Message-ID: <5097FEA9.2090603@oracle.com> Date: Mon, 05 Nov 2012 13:00:09 -0500 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121024 Thunderbird/16.0.1 MIME-Version: 1.0 To: Alan Cox CC: Sasha Levin , Greg Kroah-Hartman , Jiri Slaby , "linux-kernel@vger.kernel.org" , Dave Jones , linux-fbdev@vger.kernel.org, florianSchandinat@gmx.de Subject: Re: tty, vt: lockdep warnings References: <50899507.1040900@oracle.com> <20121026143754.50277bd8@pyramind.ukuu.org.uk> <20121105175937.26f31d2a@pyramind.ukuu.org.uk> In-Reply-To: <20121105175937.26f31d2a@pyramind.ukuu.org.uk> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1688 Lines: 47 On 11/05/2012 12:59 PM, Alan Cox wrote: > On Mon, 5 Nov 2012 12:26:43 -0500 > Sasha Levin wrote: > >> Ping? Should I bisect it? >> >> On Fri, Oct 26, 2012 at 9:37 AM, Alan Cox wrote: >>> On Thu, 25 Oct 2012 15:37:43 -0400 >>> Sasha Levin wrote: >>> >>>> Hi all, >>>> >>>> While fuzzing with trinity inside a KVM tools (lkvm) guest running latest -next kernel, >>>> I've stumbled on the following spew: >>> >>> Looks real enough but its not a tty/vt layer spew. This is all coming out >>> of the core framebuffer code which doesn't seem to be able to decide what >>> the locking rules at the invocation of fb_notifier_call_chain are. >>> >>> It might need some console layer tweaking to provide 'register console >>> and I already hold the locks' or similar but that notifier needs some >>> kind of sanity applying as well. >>> >>> Cc'ing the fbdev folks > > I've cc'd the framebuffer folks. I can see why its occurring but I have > no idea how they intend to fix it and I've not seen any replies. > > Sorry but I've got enough other things on my plate right now without > trying to deal with the locking brain damage that the fbdev layer is. > > As far as I can tell the actual bug proper is years old. > > Alan > Ow, I figured it's something new since I've only now started seeing it in fuzz tests, and it reproduces pretty much every time. Thanks, Sasha -- 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/