Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756180Ab0BSVC0 (ORCPT ); Fri, 19 Feb 2010 16:02:26 -0500 Received: from mail-yx0-f200.google.com ([209.85.210.200]:37814 "EHLO mail-yx0-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756101Ab0BSVCY (ORCPT ); Fri, 19 Feb 2010 16:02:24 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=oQZKn3nanm2FtExcQ6eQxrtAjdSQ/d5wKdihOSPFSx4jjItN/as3Lfj0Oja40dbhr/ LSTXbO1QnXYrNuAcN2ewPxIv6xjjuXUkicTqtIzCf3PrKcAe4Em/FMuRrB0Udnxk10XH gZKvQfRinS1Xp511qcs9REEa9K3/eGlLr0tfE= MIME-Version: 1.0 In-Reply-To: References: <20100215154516.GB11057@think> Date: Sat, 20 Feb 2010 07:02:23 +1000 Message-ID: <21d7e9971002191302s76111f6fyd986c51b66e214ae@mail.gmail.com> Subject: Re: [Regression] Filesystem I/O is CPU-bound in rc7 and rc8 From: Dave Airlie To: James Cloos Cc: linux-kernel@vger.kernel.org, Chris Mason , linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-btrfs@vger.kernel.org, jfs-discussion@lists.sourceforge.net Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 684 Lines: 17 On Thu, Feb 18, 2010 at 6:04 AM, James Cloos wrote: > While getting re-aquainted with perf, and after upgrading to the current > version, I see that do_page_fault, unmap_vmas, get_page_from_freelist, > handle_mm_fault, __do_fault and T.1339 tend to get the most time when the > kernel is spinning. dmesg? lspci -vv? We have an AGP related issue with WC/UC paging that might be related, but I'd need more info. Dave. -- 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/