From: Theodore Ts'o Subject: Re: Beginner questions about ext4 Date: Mon, 1 Jul 2013 12:55:24 -0400 Message-ID: <20130701165524.GB23896@thunk.org> References: <20130623115953.GA16193@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org To: Felipe Monteiro de Carvalho Return-path: Received: from li9-11.members.linode.com ([67.18.176.11]:34324 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751889Ab3GAQz1 (ORCPT ); Mon, 1 Jul 2013 12:55:27 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On Mon, Jul 01, 2013 at 05:23:13PM +0200, Felipe Monteiro de Carvalho wrote: > On Sun, Jun 23, 2013 at 1:59 PM, Theodore Ts'o wrote: > > Historically, before flex_bg, the allocation bitmaps and inode tables > > for a particular block group had to be located within that block > > group, per the image that you've referenced above. > > Thanks, but I'm still not sure: Are all groups flexible groups when > FLEX_BG feature is activated? I'm not sure whant you mean by "flexible groups". There is no such concept. > If not, I wonder how a reader will recognize which groups were merged ... And block groups don't get merged. You should think of a flex block group as a collection of block groups. (Just as a number of provinces make up country, or a collection of towns make up a county, and a number of counties make up a province.) - Ted