docs: block: fix pdf output

	here might still be useful.

Notes Written on Jan 15, 2002:

	- Jens Axboe <jens.axboe@oracle.com>

	- Suparna Bhattacharya <suparna@in.ibm.com>

New queue flags:

	QUEUE_FLAG_CLUSTER (see 3.2.2)

	QUEUE_FLAG_QUEUED (see 3.2.4)

	- QUEUE_FLAG_CLUSTER (see 3.2.2)

	- QUEUE_FLAG_QUEUED (see 3.2.4)

ii. High-mem i/o capabilities are now considered the default

- Splitting of an i/o request across multiple devices (as in the case of

  lvm or raid) is achieved by cloning the bio (where the clone points to

  the same bi_io_vec array, but with the index and size accordingly modified)

- A linked list of bios is used as before for unrelated merges [*]_ - this

- A linked list of bios is used as before for unrelated merges [#]_ - this

  avoids reallocs and makes independent completions easier to handle.

- Code that traverses the req list can find all the segments of a bio

  by using rq_for_each_segment.  This handles the fact that a request

  [TBD: Should preferably also have a bi_voffset and bi_vlen to avoid modifying

  bi_offset an len fields]

.. [*]

.. [#]

	unrelated merges -- a request ends up containing two or more bios that

	didn't originate from the same place.