From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:36439 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753677AbbLTJA0 (ORCPT ); Sun, 20 Dec 2015 04:00:26 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1aAZqm-0005vW-Al for linux-btrfs@vger.kernel.org; Sun, 20 Dec 2015 10:00:20 +0100 Received: from ip98-167-165-199.ph.ph.cox.net ([98.167.165.199]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 20 Dec 2015 10:00:20 +0100 Received: from 1i5t5.duncan by ip98-167-165-199.ph.ph.cox.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 20 Dec 2015 10:00:20 +0100 To: linux-btrfs@vger.kernel.org From: Duncan <1i5t5.duncan@cox.net> Subject: Re: Fwd: Re: Bug#808265: e2fsprogs: support btrfs compression in filefrag Date: Sun, 20 Dec 2015 09:00:14 +0000 (UTC) Message-ID: References: <20151218232521.GB16904@thunk.org> <1450483255.6251.16.camel@scientia.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: Christoph Anton Mitterer posted on Sat, 19 Dec 2015 01:00:55 +0100 as excerpted: > How, exactly, do you propose that filefrag understand this?  It is > getting the information from the fiemap ioctl: > > https://www.kernel.org/doc/Documentation/filesystems/fiemap.txt > > and the problem is that fiemap returns the logical length of the extent, > but not the *physical* length of the extent.  So this is why the > filefrag is show what appears to be overlapping extents: Thanks. The devs might have known that, but you definitely just expanded my own knowledge and understanding of the subject. (I had tried to make sense of filefrag -v and couldn't, here. After reading your relay of Ted's reply, the output makes /much/ better sense to me! =:^) -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman