From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758795Ab0J1NvH (ORCPT ); Thu, 28 Oct 2010 09:51:07 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:37156 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753003Ab0J1NvE (ORCPT ); Thu, 28 Oct 2010 09:51:04 -0400 Date: Thu, 28 Oct 2010 15:50:38 +0200 From: Ingo Molnar To: Christoph Hellwig Cc: 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 Subject: Re: 2.6.36 io bring the system to its knees Message-ID: <20101028135038.GA32157@elte.hu> References: <20101028090002.GA12446@elte.hu> <20101028133036.GA30565@elte.hu> <20101028134724.GB4416@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101028134724.GB4416@infradead.org> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Christoph Hellwig wrote: > On Thu, Oct 28, 2010 at 03:30:36PM +0200, Ingo Molnar wrote: > > > Looks mostly VFS to me. Aidar, does killing Picasa make things smoother for you? > > > If so, maybe the VFS scalability patches will help. > > > > Hm, but the VFS scalability patches mostly decrease CPU usage, and does that > > mostly on many-core systems. > > If you have i_mutex contention they are not going to change anything. Yes, that was my point. Thanks, Ingo From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with ESMTP id 8D1678D0015 for ; Thu, 28 Oct 2010 09:50:52 -0400 (EDT) Date: Thu, 28 Oct 2010 15:50:38 +0200 From: Ingo Molnar Subject: Re: 2.6.36 io bring the system to its knees Message-ID: <20101028135038.GA32157@elte.hu> References: <20101028090002.GA12446@elte.hu> <20101028133036.GA30565@elte.hu> <20101028134724.GB4416@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101028134724.GB4416@infradead.org> Sender: owner-linux-mm@kvack.org To: Christoph Hellwig Cc: 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 List-ID: * Christoph Hellwig wrote: > On Thu, Oct 28, 2010 at 03:30:36PM +0200, Ingo Molnar wrote: > > > Looks mostly VFS to me. Aidar, does killing Picasa make things smoother for you? > > > If so, maybe the VFS scalability patches will help. > > > > Hm, but the VFS scalability patches mostly decrease CPU usage, and does that > > mostly on many-core systems. > > If you have i_mutex contention they are not going to change anything. Yes, that was my point. Thanks, Ingo -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org