From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261359AbULNAqM (ORCPT ); Mon, 13 Dec 2004 19:46:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261360AbULNAqM (ORCPT ); Mon, 13 Dec 2004 19:46:12 -0500 Received: from pop5-1.us4.outblaze.com ([205.158.62.125]:64401 "HELO pop5-1.us4.outblaze.com") by vger.kernel.org with SMTP id S261359AbULNAqH (ORCPT ); Mon, 13 Dec 2004 19:46:07 -0500 Subject: Re: Suspend 2 merge: 50/51: Device mapper support. From: Nigel Cunningham Reply-To: ncunningham@linuxmail.org To: Alasdair G Kergon Cc: Pavel Machek , Linux Kernel Mailing List , dm-devel@redhat.com In-Reply-To: <20041203201248.GU24229@agk.surrey.redhat.com> References: <1101292194.5805.180.camel@desktop.cunninghams> <1101300802.5805.398.camel@desktop.cunninghams> <20041125235829.GJ2909@elf.ucw.cz> <1101427667.27250.175.camel@desktop.cunninghams> <20041202204042.GD24233@agk.surrey.redhat.com> <1102021461.13302.40.camel@desktop.cunninghams> <20041202214932.GE24233@agk.surrey.redhat.com> <1102025297.13302.51.camel@desktop.cunninghams> <20041203174749.GF24233@agk.surrey.redhat.com> <1102103827.22511.10.camel@desktop.cunninghams> <20041203201248.GU24229@agk.surrey.redhat.com> Content-Type: text/plain Message-Id: <1102975253.15369.2.camel@desktop.cunninghams> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6-1mdk Date: Tue, 14 Dec 2004 11:47:35 +1100 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi. On Sat, 2004-12-04 at 07:12, Alasdair G Kergon wrote: > [Quick commment only - travelling] > > On Sat, Dec 04, 2004 at 06:57:07AM +1100, Nigel Cunningham wrote: > > If, therefore, we we're using DM crypt to do our > > I/O, it will help if we can either get it to allocate the memory it will > > need prior to us preparing the metadata, or get from it an amount of > > memory to include in the pool, given the maximum amount of I/O we intend > > to have on the fly at once. > > But where does dm-crypt use dm-io? > dm_get_pages is used by snapshots, mirrors etc. Sorry for the slow reply. The module isn't just for dm-crypt support, but for device mapper support in general. I'm seeking to not make assumptions about what the configuration is, but simply make it support LVM/md. Regards, Nigel -- Nigel Cunningham Pastoral Worker Christian Reformed Church of Tuggeranong PO Box 1004, Tuggeranong, ACT 2901 You see, at just the right time, when we were still powerless, Christ died for the ungodly. -- Romans 5:6