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    Subject[Patch v2 00/10] Zero out devices instead of initial full sync
    Date
    Patch set is based on drbd-8.4 859e34a9, have
    already compiled/tested against SLES12.

    If this feature can be merged into upstream, please
    ignore v1, since v1 may caused pingACK timeout when
    zeroing out large device.

    Compare to v1, changes are as follow:
    1. Using drbd_device_post_work to zero out device as background
    task, so that it won't block pingACK when zeroing out
    large device.

    2. Fix bug of won't update peer node status if it finished
    zeroing out earier.

    3. Change some functions from file drbd_receive.c to
    drbd_worker.c and reorder the patch set.


    Full sync for drbd initial usually take a long time, especically
    when network become the bottleneck of the syncing. Simply skip
    the full sync with "--clear-bitmap" may not the perfect solution
    for all the cases, like using the bare device(no filesystem) to
    work,etc database,vm... This patche set can be used to zero out
    devices locally instead of a full sync to make the consistent
    block device. This approach can be useful when lack of network
    bandwidth to sync.

    The patches add one new option "--zap-devices" to "new-current-uuid"
    to zero out devices. It will start zeroing out devices of both
    side.

    Nick Wang (10):
    drbd: Fix the wrong logic of move history.
    drbd: Add options zap_devices to new-current-uuid
    drbd: Add a function to zero out drbd backing device.
    drbd: New packet P_ZERO_OUT.
    drbd: Functions to notify peer node to start
    zeroing out and zero out finished.
    drbd: Wapper for zeroing out device by worker.
    drbd: Add flag for drbd device work.
    drbd: Function to work with packet P_ZERO_OUT.
    drbd: Receive zero out command from peer node.
    drbd: Handle new-current-uuid --zap-devices.

    Signed-off-by: Nick Wang <nwang@suse.com>
    CC: Philipp Reisner <philipp.reisner@linbit.com>
    CC: Lars Ellenberg <lars.ellenberg@linbit.com>
    CC: drbd-dev@lists.linbit.com
    CC: linux-kernel@vger.kernel.org

    drbd/drbd_int.h | 13 ++++++++
    drbd/drbd_main.c | 51 ++++++++++++++++++++++++++--
    drbd/drbd_nl.c | 21 +++++++++++-
    drbd/drbd_protocol.h | 1 +
    drbd/drbd_receiver.c | 69 ++++++++++++++++++++++++++++++++++++++
    drbd/drbd_worker.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++
    drbd/linux/drbd_genl.h | 1 +
    7 files changed, 243 insertions(+), 3 deletions(-)

    --
    1.8.4.5



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