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Re: [PATCH 01/17] drbd: introduce drbd_recv_header_maybe_unplug

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On 08/24/2017 03:22 PM, Philipp Reisner wrote:
> +#ifndef blk_queue_plugged
> +struct drbd_plug_cb {
> +	struct blk_plug_cb cb;
> +	struct drbd_request *most_recent_req;
> +	/* do we need more? */
> +};

What is this blk_queue_plugged ifdef?

-- 
Jens Axboe

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[PATCH 00/17] DRBD updates Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 12/17] drbd: fix potential deadlock when trying to detach during handshake Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 04/17] drbd: Send P_NEG_ACK upon write error in protocol != C Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 03/17] drbd: add explicit plugging when submitting batches Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 05/17] drbd: mark symbols static where possible Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 02/17] drbd: change list_for_each_safe to while(list_first_entry_or_null) Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 01/17] drbd: introduce drbd_recv_header_maybe_unplug Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
    Re: [PATCH 01/17] drbd: introduce drbd_recv_header_maybe_unplug Jens Axboe <axboe@kernel.dk> - 2017-08-25 19:30 +0200
      Re: [PATCH 01/17] drbd: introduce drbd_recv_header_maybe_unplug Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-28 15:40 +0200
        [PATCH 01/17] drbd: introduce drbd_recv_header_maybe_unplug Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-28 16:00 +0200
  [PATCH 08/17] drbd: fix potential get_ldev/put_ldev refcount imbalance during attach Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 17/17] drbd: switch from kmalloc() to kmalloc_array() Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 07/17] drbd: new disk-option disable-write-same Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 15/17] drbd: move global variables to drbd namespace and make some static Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 16/17] drbd: abort drbd_start_resync if there is no connection Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 13/17] drbd: fix race between handshake and admin disconnect/down Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200
  [PATCH 10/17] drbd: fix rmmod cleanup, remove _all_ debugfs entries Philipp Reisner <philipp.reisner@linbit.com> - 2017-08-24 23:30 +0200

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