Documentation update, adding references to CFQ scheduler and to another
document about selecting IO Schedulers.
Signed-off-by: NFilipe Lautert <filipe@icewall.org>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>