From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.suse.de ([195.135.220.15]:44423 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752395AbbI3PRy (ORCPT ); Wed, 30 Sep 2015 11:17:54 -0400 Date: Wed, 30 Sep 2015 17:16:53 +0200 From: David Sterba To: Austin S Hemmelgarn Cc: =?iso-8859-1?Q?Gabr=EDel_Arth=FAr_P=E9tursson?= , linux-btrfs@vger.kernel.org Subject: Re: Add stripes filter Message-ID: <20150930151653.GJ11442@suse.cz> Reply-To: dsterba@suse.cz References: <1443463025.16163.6.camel@system.is> <20150929120029.GX11442@twin.jikos.cz> <560A7FAB.1040607@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 In-Reply-To: <560A7FAB.1040607@gmail.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Tue, Sep 29, 2015 at 08:10:19AM -0400, Austin S Hemmelgarn wrote: > On 2015-09-29 08:00, David Sterba wrote: > > On Mon, Sep 28, 2015 at 05:57:05PM +0000, Gabríel Arthúr Pétursson wrote: > >> The attached patches to linux and btrfs-progs add support for filtering > >> based on the number of strips in a block when balancing. > > > > What usecase do you want to address? As I understand it, this would help > > the raid56 rebalancing to process only blockgroups that are not spread > > accross enough devices. > This could also be helpful when reshaping a raid10 or raid0 setup. Right, I forgot to mention it, I should have said "any raid profile that uses stripes".