Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:43796 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753786AbcFEWDJ (ORCPT ); Sun, 5 Jun 2016 18:03:09 -0400 Subject: Patch "btrfs: allow balancing to dup with multi-device" has been added to the 4.5-stable tree To: ahferroin7@gmail.com, dsterba@suse.com, gregkh@linuxfoundation.org Cc: , From: Date: Sun, 05 Jun 2016 14:48:02 -0700 Message-ID: <146516328279155@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled btrfs: allow balancing to dup with multi-device to the 4.5-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: btrfs-allow-balancing-to-dup-with-multi-device.patch and it can be found in the queue-4.5 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >From 88be159c905a2b4f6d59afa352bef410afb6af02 Mon Sep 17 00:00:00 2001 From: "Austin S. Hemmelgarn" Date: Wed, 23 Mar 2016 14:22:59 -0400 Subject: btrfs: allow balancing to dup with multi-device From: Austin S. Hemmelgarn commit 88be159c905a2b4f6d59afa352bef410afb6af02 upstream. Currently, we don't allow the user to try and rebalance to a dup profile on a multi-device filesystem. In most cases, this is a perfectly sensible restriction as raid1 uses the same amount of space and provides better protection. However, when reshaping a multi-device filesystem down to a single device filesystem, this requires the user to convert metadata and system chunks to single profile before deleting devices, and then convert again to dup, which leaves a period of time where metadata integrity is reduced. This patch removes the single-device-only restriction from converting to dup profile to remove this potential data integrity reduction. Signed-off-by: Austin S. Hemmelgarn Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/volumes.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -3699,10 +3699,8 @@ int btrfs_balance(struct btrfs_balance_c num_devices--; } btrfs_dev_replace_unlock(&fs_info->dev_replace); - allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE; - if (num_devices == 1) - allowed |= BTRFS_BLOCK_GROUP_DUP; - else if (num_devices > 1) + allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE | BTRFS_BLOCK_GROUP_DUP; + if (num_devices > 1) allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1); if (num_devices > 2) allowed |= BTRFS_BLOCK_GROUP_RAID5; Patches currently in stable-queue which might be from ahferroin7@gmail.com are queue-4.5/btrfs-allow-balancing-to-dup-with-multi-device.patch