Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265037AbTFRBj5 (ORCPT ); Tue, 17 Jun 2003 21:39:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265038AbTFRBj5 (ORCPT ); Tue, 17 Jun 2003 21:39:57 -0400 Received: from [65.39.167.210] ([65.39.167.210]:17794 "HELO innerfire.net") by vger.kernel.org with SMTP id S265037AbTFRBj4 (ORCPT ); Tue, 17 Jun 2003 21:39:56 -0400 Date: Tue, 17 Jun 2003 21:50:54 -0400 (EDT) From: Gerhard Mack To: James Simmons cc: Robert Love , Subject: Re: Linux 2.5.71 - random console corruption In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1275 Lines: 36 On Tue, 17 Jun 2003, James Simmons wrote: > > > For userland<->kernel transactions we have the console_semaphore to > > > protect us. It is also used for console_callback. The console_semaphore is > > > not used internally to protect global variables :-( To do this properly > > > would take quite a bit of work. > > > > It looks like all these globals need a lock -- they can race on SMP or > > with kernel preemption. > > > > Is it really going to be that hard to wrap a lock around their access, > > because I think this is going to bite SMP users. > > For things like fg_console and currcon it will be. Those variables are > used everyway like mad. That is a whole lot of locks. I doubt this issue > will be solved until 2.7.X. Interestingly enough it's not console switching that does it.. it's scrolling also as I mentioned before it's not just with preempt enabled. I wonder if theres another problem somewhere? Gerhard -- Gerhard Mack gmack@innerfire.net <>< As a computer I find your faith in technology amusing. - 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/