From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f47.google.com ([209.85.220.47]:34516 "EHLO mail-pa0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751226AbcFNLNb (ORCPT ); Tue, 14 Jun 2016 07:13:31 -0400 Received: by mail-pa0-f47.google.com with SMTP id bz2so55634618pad.1 for ; Tue, 14 Jun 2016 04:13:30 -0700 (PDT) Date: Tue, 14 Jun 2016 19:13:22 +0800 From: Eryu Guan To: linux-btrfs@vger.kernel.org Cc: Liu Bo Subject: BUG: unable to mount btrfs on ppc64 starting from v4.7-rc3 kernel Message-ID: <20160614111322.GN10350@eguan.usersys.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-btrfs-owner@vger.kernel.org List-ID: Hi, I'm unable to mount btrfs on ppc64 hosts and other hosts with 64k pagesize(like aarch64, ppc64le). It seems that it's commit 99e3ecfcb9f4 ("Btrfs: add more validation checks for superblock") introduced this failure, btrfs fails stripesize check. [root@ibm-p8-kvm-09-guest-06 btrfs-progs]# uname -r 4.7.0-rc3 [root@ibm-p8-kvm-09-guest-06 btrfs-progs]# ./mkfs.btrfs -f /dev/vda3 btrfs-progs v4.4 See http://btrfs.wiki.kernel.org for more information. Label: (null) UUID: 06813ff6-d585-4c54-b4df-b7d6920d27ba Node size: 65536 Sector size: 65536 Filesystem size: 15.00GiB Block group profiles: Data: single 8.00MiB Metadata: DUP 1.01GiB System: DUP 12.00MiB SSD detected: no Incompat features: extref, skinny-metadata Number of devices: 1 Devices: ID SIZE PATH 1 15.00GiB /dev/vda3 [root@ibm-p8-kvm-09-guest-06 btrfs-progs]# mount /dev/vda3 /mnt mount: wrong fs type, bad option, bad superblock on /dev/vda3, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so. [root@ibm-p8-kvm-09-guest-06 btrfs-progs]# dmesg | tail ... [ 1910.048650] BTRFS: device fsid 06813ff6-d585-4c54-b4df-b7d6920d27ba devid 1 transid 3 /dev/vda3 [ 1913.152085] BTRFS error (device vda3): invalid stripesize 4096 [ 1913.154349] BTRFS error (device vda3): superblock contains fatal errors [ 1913.200300] BTRFS: open_ctree failed Thanks, Eryu