[PATCH v4 0/3] btrfs: Fix lost-data-profile caused by auto removing bg and balance bg

[Zhao Lei <zhaolei@cn.fujitsu.com>]

Changelog v3->v4:
1: Avoid down_read() in spin_lock context.
   Noticed-by: Chris Mason <clm@fb.com>

Changelog v2->v3:
1: Use list_is_singular() instead of
   block_group->list.next == block_group->list.prev
   Suggested-by: Jeff Mahoney <jeffm@suse.com>
2: Add Reviewed-by: Filipe Manana <fdmanana@suse.com>

Changelog v1->v2:
1: Put code of checking block_group->list into
   semaphore of space_info->groups_sem.
   Noticed-by: Filipe Manana <fdmanana@gmail.com>
2: Update patch description of "Fix" field
3: Use BTRFS_BLOCK_GROUP_DATA for btrfs_force_chunk_alloc
   instead of 1
4: Only reserve chunk when doing balance on data chunk.
All suggested-by: Filipe Manana <fdmanana@gmail.com>

Zhao Lei (3):
  btrfs: Fix lost-data-profile caused by auto removing bg
  btrfs: Fix lost-data-profile caused by balance bg
  btrfs: Use fs_info directly in btrfs_delete_unused_bgs

 fs/btrfs/extent-tree.c | 11 +++++++----
 fs/btrfs/volumes.c     | 24 ++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 4 deletions(-)

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1.8.5.1