From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phillip Susi Subject: Ext4 tail merging? Date: Tue, 23 Dec 2014 16:34:29 -0500 Message-ID: <5499DFE5.60508@ubuntu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit To: ext4 development Return-path: Received: from mail-qc0-f180.google.com ([209.85.216.180]:55902 "EHLO mail-qc0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751352AbaLWVed (ORCPT ); Tue, 23 Dec 2014 16:34:33 -0500 Received: by mail-qc0-f180.google.com with SMTP id i8so5262415qcq.11 for ; Tue, 23 Dec 2014 13:34:32 -0800 (PST) Received: from [10.1.1.236] (fl-67-77-88-12.sta.embarqhsd.net. [67.77.88.12]) by mx.google.com with ESMTPSA id f77sm19801764qgd.49.2014.12.23.13.34.31 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 23 Dec 2014 13:34:31 -0800 (PST) Sender: linux-ext4-owner@vger.kernel.org List-ID: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Ext4 still does not support tail merging right? I had a user post this filefrag output and was surprised to see that it says the merged flag is set. How can this be? $ filefrag -v /boot/grub/grubenv Filesystem type is: ef53 Filesystem cylinder groups approximately 19 File size of /boot/grub/grubenv is 1024 (1 block of 4096 bytes) ext: logical_offset: physical_offset: length: expected: flags: 0: 0.. 0: 494592.. 494592: 1: merged,eof /boot/grub/grubenv: 1 extent found, perfection would be -1 extent -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) iQEcBAEBAgAGBQJUmd/lAAoJENRVrw2cjl5RL1YH+gOPL+fxjD9zUlgOZf40D25l HgyXP6uXiiLmm/ZUq+htmsvcsM2B7ymT2eZ7mFJfPW90zZbwY9aMXLxf7sSwwu9w 9aETK/s/aMzih+CEii4oDAd2URzpHGzYeQyvH5xPm01JOm7aHMUzw8kMYE5AFvsB 8/HJWboAbZFpdFQO7GRcFWknbEhHAfYwOCOvv7H5Ouks7+Ia07fQD68pzbdVtP90 LDRbml1cg7Us8BJa1Hrc/DfYTa0DcsIpAgFlbCEAu7Mui2C2EW0qDX6TCp9jHM6C 6XGjGqW1f70rgAzK4P2sfMa1UkF/PQQpoTiKjzinZuBbc6Krv7tjJvPXrv7uy1Q= =GIq0 -----END PGP SIGNATURE-----