Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754645Ab0ALQ2d (ORCPT ); Tue, 12 Jan 2010 11:28:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754520Ab0ALQ23 (ORCPT ); Tue, 12 Jan 2010 11:28:29 -0500 Received: from one.firstfloor.org ([213.235.205.2]:37268 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754158Ab0ALQ22 (ORCPT ); Tue, 12 Jan 2010 11:28:28 -0500 Date: Tue, 12 Jan 2010 17:28:24 +0100 From: Andi Kleen To: =?iso-8859-1?Q?Am=E9rico?= Wang Cc: Andi Kleen , linux-kernel@vger.kernel.org Subject: Re: 2.6.33 pagemap endless read loop Message-ID: <20100112162823.GC7363@basil.fritz.box> References: <20100110020955.GB25323@basil.fritz.box> <20100110063335.GA3005@hack> <20100110123702.GC25323@basil.fritz.box> <20100112153208.GF3925@hack> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100112153208.GF3925@hack> 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: 483 Lines: 17 > Hmm, could you please try: > > time cat /proc/self/pagemap >/dev/null > I stopped it after a minute of CPU time... Obviously reading 47bits of zeroes take a long time. -Andi -- ak@linux.intel.com -- Speaking for myself only. -- 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/