path: root/Documentation
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authorNikanth Karthikesan <knikanth@suse.de>2009-01-27 09:29:24 +0100
committerJens Axboe <jens.axboe@oracle.com>2009-01-30 12:34:37 +0100
commit7598909e3ee2a08726276d6415b69dadb52d0d76 (patch)
treea876f1691934bcd0e2a3787837ba997e2834b15c /Documentation
parenta229fc61ef0ee3c30fd193beee0eeb87410227f1 (diff)
Mark mandatory elevator functions in the biodoc.txt
biodoc.txt mentions that elevator functions marked with * are mandatory, but no function is marked with *. Mark the 3 functions which should be implemented by any io scheduler. Signed-off-by: Nikanth Karthikesan <knikanth@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'Documentation')
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/block/biodoc.txt b/Documentation/block/biodoc.txt
index 5d2480d33b4..ecad6ee7570 100644
--- a/Documentation/block/biodoc.txt
+++ b/Documentation/block/biodoc.txt
@@ -954,14 +954,14 @@ elevator_allow_merge_fn called whenever the block layer determines
results in some sort of conflict internally,
this hook allows it to do that.
-elevator_dispatch_fn fills the dispatch queue with ready requests.
+elevator_dispatch_fn* fills the dispatch queue with ready requests.
I/O schedulers are free to postpone requests by
not filling the dispatch queue unless @force
is non-zero. Once dispatched, I/O schedulers
are not allowed to manipulate the requests -
they belong to generic dispatch queue.
-elevator_add_req_fn called to add a new request into the scheduler
+elevator_add_req_fn* called to add a new request into the scheduler
elevator_queue_empty_fn returns true if the merge queue is empty.
Drivers shouldn't use this, but rather check
@@ -991,7 +991,7 @@ elevator_activate_req_fn Called when device driver first sees a request.
elevator_deactivate_req_fn Called when device driver decides to delay
a request by requeueing it.
elevator_exit_fn Allocate and free any elevator specific storage
for a queue.