From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com ([134.134.136.20]:16193 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966382AbcHEHBf (ORCPT ); Fri, 5 Aug 2016 03:01:35 -0400 Message-ID: <1470380474.2311.71.camel@gmail.com> Subject: Re: [PATCH v7 00/47] xfs: add reverse mapping support From: Artem Bityutskiy Reply-To: dedekind1@gmail.com To: Dave Chinner , "Darrick J. Wong" Cc: Mark Fasheh , linux-fsdevel@vger.kernel.org, vishal.l.verma@intel.com, bfoster@redhat.com, xfs@oss.sgi.com Date: Fri, 05 Aug 2016 10:01:14 +0300 In-Reply-To: <20160804235015.GC16044@dastard> References: <146907695530.25461.3225785294902719773.stgit@birch.djwong.org> <20160803194536.GJ5316@wotan.suse.de> <20160803205520.GQ8590@birch.djwong.org> <20160804005843.GJ8593@birch.djwong.org> <20160804021852.GK5316@wotan.suse.de> <20160804154845.GV8590@birch.djwong.org> <20160804235015.GC16044@dastard> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Fri, 2016-08-05 at 09:50 +1000, Dave Chinner wrote: > I'd much prefer that fiemap gives exact information about shared > extents. FIEMAP is a diagnostic tool and as such we need it to > accurately reflect the exact extent map of the inode being queried > so we aren't mislead about the layout of the file during trouble > shooting. Hi Dave, you are right, and here is a side note:  we were using FIEMAP for optimizing image deployment in production, so it is a diagnostic tool and more.