Btrfs fixes for 4.8, part 2

Hi,

this is a short series, mostly small fixes that did not make it to the first round. Please pull, thanks.

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The following changes since commit 10838816547a28696ca10e038b3b32f2efec5a42:

Merge branch 'integration-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/fdmanana/linux into for-linus-4.8 (2016-08-05 12:25:05 -0700)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-chris-4.8

for you to fetch changes up to 56ee3f62c2c78b2ec541283d39208683e8ce385f:

btrfs: qgroup: Fix qgroup incorrectness caused by log replay (2016-08-17 15:41:05 +0200)

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Alex Lyakas (1):
btrfs: flush_space: treat return value of do_chunk_alloc properly

Jeff Mahoney (2):
btrfs: properly track when rescan worker is running
btrfs: waiting on qgroup rescan should not always be interruptible

Liu Bo (2):
Btrfs: fix memory leak of reloc_root
Btrfs: add ASSERT for block group's memory leak

Qu Wenruo (4):
btrfs: backref: Fix soft lockup in __merge_refs function
btrfs: qgroup: Refactor btrfs_qgroup_insert_dirty_extent()
btrfs: relocation: Fix leaking qgroups numbers on data extents
btrfs: qgroup: Fix qgroup incorrectness caused by log replay

 fs/btrfs/backref.c     |   1 +
 fs/btrfs/ctree.h       |   1 +
 fs/btrfs/delayed-ref.c |   7 +---
 fs/btrfs/disk-io.c     |  12 +++++-
 fs/btrfs/extent-tree.c |  44 +++++---------------
 fs/btrfs/ioctl.c       |   2 +-
 fs/btrfs/qgroup.c      |  62 +++++++++++++++++++++++-----
 fs/btrfs/qgroup.h      |  36 +++++++++++++---
 fs/btrfs/relocation.c  | 109 ++++++++++++++++++++++++++++++++++++++++++++++---
 fs/btrfs/tree-log.c    |  16 ++++++++
 10 files changed, 228 insertions(+), 62 deletions(-)

As you did not pick this pull request, I'll prepare another one with more patches, based on this branch.

Thanks Dave, I've been trying to nail down this fsync memory corruption problem. But, I'll send a pull on Thursday/Friday with or without an fsync patch.

-chris