From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752024AbaGVBYC (ORCPT ); Mon, 21 Jul 2014 21:24:02 -0400 Received: from mx1.redhat.com ([209.132.183.28]:64746 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751460AbaGVBYA (ORCPT ); Mon, 21 Jul 2014 21:24:00 -0400 Date: Tue, 22 Jul 2014 02:23:52 +0100 From: Alasdair G Kergon To: "Zhang, Yanmin" Cc: Mikulas Patocka , "xinhui.pan" , linux-kernel@vger.kernel.org, agk@redhat.com, snitzer@redhat.com, dm-devel@redhat.com, "Liu, ShuoX" Subject: Re: [dm-devel] [PATCH] md/dm-ioctl.c: optimize memory allocation in copy_params Message-ID: <20140722012352.GD6822@agk-dp.fab.redhat.com> Mail-Followup-To: "Zhang, Yanmin" , Mikulas Patocka , "xinhui.pan" , linux-kernel@vger.kernel.org, agk@redhat.com, snitzer@redhat.com, dm-devel@redhat.com, "Liu, ShuoX" References: <53B68068.2060102@intel.com> <53BCA278.5050205@linux.intel.com> <53CDB81B.90509@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <53CDB81B.90509@linux.intel.com> Organization: Red Hat UK Ltd. Registered in England and Wales, number 03798903. Registered Office: 64 Baker Street, 4th floor, London, W1U 7DF. User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >>> On 2014/7/9 6:39, Mikulas Patocka wrote: >> Which ioctl with more than 16kB >> arguments do you use? Unanswered. Let's ask the same question in a different way: Please supply the output of these three commands on the real-world system on which you believe that that particular allocation is causing you a problem: dmsetup info -c dmsetup table dmsetup status Alasdair