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| author |   Jens Axboe <axboe@fb.com> | 2015-06-10 08:01:20 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-06-10 08:01:20 -0600 |
| commit | 0bb979472a7401022109e81dd89d777adea58710 (patch) | |
| tree | 27cf4730d269d037ad5b0db1f89d5ecf788cb3d0 /include/linux/elevator.h | |
| parent | blktrace: Add blktrace.c to BLOCK LAYER in MAINTAINERS file (diff) | |
| download | wireguard-linux-0bb979472a7401022109e81dd89d777adea58710.tar.xz wireguard-linux-0bb979472a7401022109e81dd89d777adea58710.zip | |
cfq-iosched: fix the setting of IOPS mode on SSDs
A previous commit wanted to make CFQ default to IOPS mode on
non-rotational storage, however it did so when the queue was
initialized and the non-rotational flag is only set later on
in the probe.
Add an elevator hook that gets called off the add_disk() path,
at that point we know that feature probing has finished, and
we can reliably check for the various flags that drivers can
set.
Fixes: 41c0126b ("block: Make CFQ default to IOPS mode on SSDs")
Tested-by: Romain Francoise <romain@orebokech.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/elevator.h')
| -rw-r--r-- | include/linux/elevator.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/elevator.h b/include/linux/elevator.h index 45a91474487d..638b324f0291 100644 --- a/include/linux/elevator.h +++ b/include/linux/elevator.h @@ -39,6 +39,7 @@ typedef void (elevator_deactivate_req_fn) (struct request_queue *, struct reques typedef int (elevator_init_fn) (struct request_queue *, struct elevator_type *e); typedef void (elevator_exit_fn) (struct elevator_queue *); +typedef void (elevator_registered_fn) (struct request_queue *); struct elevator_ops { @@ -68,6 +69,7 @@ struct elevator_ops elevator_init_fn *elevator_init_fn; elevator_exit_fn *elevator_exit_fn; + elevator_registered_fn *elevator_registered_fn; }; #define ELV_NAME_MAX (16) |