From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753377AbYHLT2s (ORCPT ); Tue, 12 Aug 2008 15:28:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751748AbYHLT2l (ORCPT ); Tue, 12 Aug 2008 15:28:41 -0400 Received: from thumper2.emsphone.com ([199.67.51.102]:37377 "EHLO thumper2.emsphone.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751388AbYHLT2k (ORCPT ); Tue, 12 Aug 2008 15:28:40 -0400 X-Greylist: delayed 729 seconds by postgrey-1.27 at vger.kernel.org; Tue, 12 Aug 2008 15:28:40 EDT Date: Tue, 12 Aug 2008 14:13:11 -0500 From: Andy To: linux-kernel@vger.kernel.org Subject: 2.6.27 diskstats missing disks Message-ID: <20080812191311.GA3092@thumper2> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.16 (2007-06-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In kernels 2.6.27-rc1 and rc2 /proc/diskstats only displays 15 scsi devices (includes partitions), or 9 actual devices (sda-i). I'm using multipath and device mapper, none of the dm devices are in the list either. The 2.6.26 kernel lists all devices, including all dm devices. Since diskstats does not contain all the disks, iostat will not display the io for the disks that are missing, which means, I can't see all of the io activity that is taking place on the system. This seems like a bug to me. Andy