Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752132Ab0KDX7R (ORCPT ); Thu, 4 Nov 2010 19:59:17 -0400 Received: from swampdragon.chaosbits.net ([90.184.90.115]:28411 "EHLO swampdragon.chaosbits.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750967Ab0KDX7O (ORCPT ); Thu, 4 Nov 2010 19:59:14 -0400 Date: Fri, 5 Nov 2010 00:48:17 +0100 (CET) From: Jesper Juhl To: Chris Mason cc: Ingo Molnar , Pekka Enberg , Aidar Kultayev , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds , Andrew Morton , Jens Axboe , Peter Zijlstra , Nick Piggin , Arjan van de Ven , Thomas Gleixner , "Ted Ts'o" , Corrado Zoccolo , Shaohua Li , Sanjoy Mahajan , Steven Barrett Subject: Re: 2.6.36 io bring the system to its knees In-Reply-To: Message-ID: References: <20101028090002.GA12446@elte.hu> <20101028133036.GA30565@elte.hu> <20101028170132.GY27796@think> User-Agent: Alpine 2.00 (LNX 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2085 Lines: 45 On Fri, 5 Nov 2010, Jesper Juhl wrote: > On Thu, 28 Oct 2010, Chris Mason wrote: > > > On Thu, Oct 28, 2010 at 03:30:36PM +0200, Ingo Molnar wrote: > > > > > > "Many seconds freezes" and slowdowns wont be fixed via the VFS scalability patches > > > i'm afraid. > > > > > > This has the appearance of some really bad IO or VM latency problem. Unfixed and > > > present in stable kernel versions going from years ago all the way to v2.6.36. > > > > Hmmm, the workload you're describing here has two special parts. First > > it dramatically overloads the disk, and then it has guis doing things > > waiting for the disk. > > > > Just want to chime in with a 'me too'. > > I see something similar on Arch Linux when doing 'pacman -Syyuv' and there > are many (as in more than 5-10) updates to apply. While the update is > running (even if that's all the system is doing) system responsiveness is > terrible - just starting 'chromium' which is usually instant (at least > less than 2 sec at worst) can take upwards of 10 seconds and the mouse > cursor in X starts to jump a bit as well and switching virtual desktops > noticably lags when redrawing the new desktop if there's a full screen app > like gimp or OpenOffice open there. This is on a Lenovo Thinkpad R61i > which has a 'Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz' CPU, 2GB of > memory and 499996 kilobytes of swap. > Forgot to mention the kernel I currently experience this with : [jj@dragon ~]$ uname -a Linux dragon 2.6.35-ARCH #1 SMP PREEMPT Sat Oct 30 21:22:26 CEST 2010 x86_64 Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz GenuineIntel GNU/Linux -- Jesper Juhl http://www.chaosbits.net/ Plain text mails only, please http://www.expita.com/nomime.html Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.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/