From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932614AbWFTMQT (ORCPT ); Tue, 20 Jun 2006 08:16:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932615AbWFTMQT (ORCPT ); Tue, 20 Jun 2006 08:16:19 -0400 Received: from nessie.weebeastie.net ([220.233.7.36]:17423 "EHLO bunyip.lochness.weebeastie.net") by vger.kernel.org with ESMTP id S932614AbWFTMQS (ORCPT ); Tue, 20 Jun 2006 08:16:18 -0400 Date: Tue, 20 Jun 2006 22:17:10 +1000 From: CaT To: Heinz Mauelshagen Cc: linux-kernel@vger.kernel.org, dm-devel@redhat.com Subject: Re: 2.6.16.20/dm: can't create more then one snapshot of an lv Message-ID: <20060620121710.GA2059@zip.com.au> References: <20060619020040.GX2059@zip.com.au> <20060620005405.GY2059@zip.com.au> <20060620100209.GA4566@redhat.com> <20060620114613.GZ2059@zip.com.au> <20060620115545.GB4566@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060620115545.GB4566@redhat.com> Organisation: Furball Inc. User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 20, 2006 at 01:55:45PM +0200, Heinz Mauelshagen wrote: > On Tue, Jun 20, 2006 at 09:46:13PM +1000, CaT wrote: > > On Tue, Jun 20, 2006 at 12:02:09PM +0200, Heinz Mauelshagen wrote: > > > How many snapshots active at once ? > > > > 1. I can start more then 1 premade snapshots just fine and use them > > but the moment I add another one a freeze occurs. > > Well, that's fairly few ;) Yes. I thought so too. :) > > > I guess this is a kcopyd scalability issue which needs addressing. > > > > Well in the end I'm hoping to get at least 7. Hopefully that's not > > insane. :) > > No, I was assuming, you were trying to activate plenty. Not yet. Though as I said I plan to max out at 7 or so. > FYI: the snapshot code in 2.6.17-rc has received a fair amount of fixes > which might help this vs. 2.6.16.20. I tried 2.6.17 and I get the same issue. Any other kernel you want me to try? I can reboot this box at will at the moment and test. -- "To the extent that we overreact, we proffer the terrorists the greatest tribute." - High Court Judge Michael Kirby