Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754457AbYGGRhm (ORCPT ); Mon, 7 Jul 2008 13:37:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753969AbYGGRhY (ORCPT ); Mon, 7 Jul 2008 13:37:24 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:59302 "EHLO gprs189-60.eurotel.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755415AbYGGRhX (ORCPT ); Mon, 7 Jul 2008 13:37:23 -0400 Date: Mon, 7 Jul 2008 19:37:08 +0200 From: Pavel Machek To: Linus Torvalds Cc: "Rafael J. Wysocki" , Linux Kernel Mailing List , Adrian Bunk , Andrew Morton , Natalie Protasevich , Kernel Testers List , Maximilian Engelhardt , Randy Dunlap , "Paul E. McKenney" , James Bottomley Subject: Re: 2.6.26-rc9: Reported regressions from 2.6.25 Message-ID: <20080707173708.GA3000@elf.ucw.cz> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1346 Lines: 30 Hi! > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=10919 > > Subject : [regression] display dimming is slow and laggy - Acer Travelmate 661lci > > Submitter : Maximilian Engelhardt > > Date : 2008-06-14 22:31 (23 days old) > > References : http://marc.info/?l=linux-kernel&m=121348428828320&w=4 > > I wonder if this one could be related. The 'nr_zones' overwriting bug > would result in kswapd not reclaiming any memory asynchronously, so the > kernel would basically be constantly under a low-memory situation, and > processes would be forced to do synchronous reclaim. > > That, in turn, could easily explain laggy operation, especially if it is > something bigger that needs to allocate new memory (not that I know if X > dimming needs to, but I could imagine that it does some double buffering > or whatever). Hmm, but that would mean whole system is slow, right? I'd bet this is ACPI EC problem... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- 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/