[Drbd-dev] [PATCH 00/30] DRBD updates

Philipp Reisner philipp.reisner at linbit.com
Mon Jun 13 16:08:48 CEST 2016

Hi Jens,

I have sent this already on April 25, I guess it was too late in the cycle
at that time. Apart from the usual maintenance and bug fixes this time comes
support for WRITE_SAME and lots of improvements for DISCARD.

At that time we had a discussion about (1) the all_zero() heuristic introduced
with [PATCH 04/30] drbd: Implement handling of thinly provisioned storage...
not being efficient, and about the (2) rs-discard-granularity configuration

Regarding (1): I intend to work on block-devices being able to export their
allocation map by either FIEMAP or SEEK_HOLE/SEEK_DATA or both for the next
cycle. The I will change DRBD to use that as well.

Regarding (2): We need to announce the discard granularity when we create the
device/minor. At might it might be that there is no connection to the peer
node. So we are left with information about the discard granularity of the
local backing device only. Therefore we decided to delegate it to the
user/admin to provide the discard granularity for the resync process.

Please add it to your for-4.8/drivers branch.

Fabian Frederick (1):
  drbd: code cleanups without semantic changes

Lars Ellenberg (24):
  drbd: bitmap bulk IO: do not always suspend IO
  drbd: change bitmap write-out when leaving resync states
  drbd: adjust assert in w_bitmap_io to account for
  drbd: fix regression: protocol A sometimes synchronous, C sometimes
  drbd: fix for truncated minor number in callback command line
  drbd: allow parallel flushes for multi-volume resources
  drbd: when receiving P_TRIM, zero-out partial unaligned chunks
  drbd: possibly disable discard support, if backend has
  drbd: zero-out partial unaligned discards on local backend
  drbd: allow larger max_discard_sectors
  drbd: finish resync on sync source only by notification from sync
  drbd: introduce unfence-peer handler
  drbd: don't forget error completion when "unsuspending" IO
  drbd: if there is no good data accessible, writes should be IO errors
  drbd: only restart frozen disk io when D_UP_TO_DATE
  drbd: discard_zeroes_if_aligned allows "thin" resync for
  drbd: report sizes if rejecting too small peer disk
  drbd: introduce WRITE_SAME support
  drbd: sync_handshake: handle identical uuids with current (frozen)
  drbd: disallow promotion during resync handshake, avoid deadlock and
    hard reset
  drbd: bump current uuid when resuming IO with diskless peer
  drbd: finally report ms, not jiffies, in log message
  drbd: al_write_transaction: skip re-scanning of bitmap page pointer
  drbd: correctly handle failed crypto_alloc_hash

Philipp Reisner (4):
  drbd: Kill code duplication
  drbd: Implement handling of thinly provisioned storage on resync
    target nodes
  drbd: Introduce new disk config option rs-discard-granularity
  drbd: Create the protocol feature THIN_RESYNC

Roland Kammerer (1):
  drbd: get rid of empty statement in is_valid_state

 drivers/block/drbd/drbd_actlog.c   |  29 +-
 drivers/block/drbd/drbd_bitmap.c   |  84 ++++--
 drivers/block/drbd/drbd_debugfs.c  |  13 +-
 drivers/block/drbd/drbd_int.h      |  49 +++-
 drivers/block/drbd/drbd_interval.h |  14 +-
 drivers/block/drbd/drbd_main.c     | 115 +++++++-
 drivers/block/drbd/drbd_nl.c       | 282 +++++++++++++++-----
 drivers/block/drbd/drbd_proc.c     |  30 +--
 drivers/block/drbd/drbd_protocol.h |  77 +++++-
 drivers/block/drbd/drbd_receiver.c | 534 ++++++++++++++++++++++++++++++-------
 drivers/block/drbd/drbd_req.c      |  84 ++++--
 drivers/block/drbd/drbd_req.h      |   5 +-
 drivers/block/drbd/drbd_state.c    |  61 ++++-
 drivers/block/drbd/drbd_state.h    |   2 +-
 drivers/block/drbd/drbd_strings.c  |   8 +-
 drivers/block/drbd/drbd_worker.c   |  85 +++++-
 include/linux/drbd.h               |  10 +-
 include/linux/drbd_genl.h          |   7 +-
 include/linux/drbd_limits.h        |  15 +-
 19 files changed, 1205 insertions(+), 299 deletions(-)


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