From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754032AbZFPIgr (ORCPT ); Tue, 16 Jun 2009 04:36:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750961AbZFPIgk (ORCPT ); Tue, 16 Jun 2009 04:36:40 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:39865 "EHLO www.etchedpixels.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751513AbZFPIgj (ORCPT ); Tue, 16 Jun 2009 04:36:39 -0400 Date: Tue, 16 Jun 2009 09:37:41 +0100 From: Alan Cox To: Steven Rostedt Cc: Andrew Morton , Ingo Molnar , LKML Subject: Re: bug in tty ldisc and friends Message-ID: <20090616093741.0d5b36bc@lxorguk.ukuu.org.uk> In-Reply-To: References: X-Mailer: Claws Mail 3.7.0 (GTK+ 2.14.7; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 16 Jun 2009 01:45:36 -0400 (EDT) Steven Rostedt wrote: > > [ Ingo and Andrew, sorry for the repost, but I forgot to Cc LKML and I > also used Alan's old email. ] > > I can easily trigger a bug in the tty code by enabling the event tracers. Yes I know. I sent Linus a temporary workaround yesterday. The bug is as old as the hills (the race in various forms predates any git or bk history!). The ldisc changes happened to make it more visible. Unfortunately its non trivial to fix but the workaround should make it as hard to hit now as in 2.6.30 while I sort the funnies out. Really though I need the lock verifier working to do that, and its been busted since 2.6.30 8( Alan