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| author |   Tejun Heo <htejun@gmail.com> | 2006-01-06 09:51:03 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@suse.de> | 2006-01-06 09:51:03 +0100 |
| commit | 797e7dbbee0a91fa1349192f18ad5c454997d876 (patch) | |
| tree | c0d5974f469dd2d3d4f9b15d87d201b61e248f54 /include/linux/elevator.h | |
| parent | [BLOCK] ll_rw_blk: separate out bio init part from __make_request (diff) | |
| download | linux-dev-797e7dbbee0a91fa1349192f18ad5c454997d876.tar.xz linux-dev-797e7dbbee0a91fa1349192f18ad5c454997d876.zip | |
[BLOCK] reimplement handling of barrier request
Reimplement handling of barrier requests.
* Flexible handling to deal with various capabilities of
target devices.
* Retry support for falling back.
* Tagged queues which don't support ordered tag can do ordered.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'include/linux/elevator.h')
| -rw-r--r-- | include/linux/elevator.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/elevator.h b/include/linux/elevator.h index a74c27e460ba..fb80fa44c4dd 100644 --- a/include/linux/elevator.h +++ b/include/linux/elevator.h @@ -130,6 +130,7 @@ extern int elv_try_last_merge(request_queue_t *, struct bio *); #define ELEVATOR_INSERT_FRONT 1 #define ELEVATOR_INSERT_BACK 2 #define ELEVATOR_INSERT_SORT 3 +#define ELEVATOR_INSERT_REQUEUE 4 /* * return values from elevator_may_queue_fn |