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| author | Jens Axboe <jens.axboe@oracle.com> | 2009-05-20 08:54:31 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-05-20 08:54:31 +0200 |
| commit | 0a7ae2ff0d29bb3b327edff4c8ab67b3834fa811 (patch) | |
| tree | 88309ac99a39e15b9b23525a00a15b1564957b32 /include/linux | |
| parent | ac36552a52a6ec8563ac0a109e2a0935673f4abb (diff) | |
| download | linux-0a7ae2ff0d29bb3b327edff4c8ab67b3834fa811.tar.gz linux-0a7ae2ff0d29bb3b327edff4c8ab67b3834fa811.tar.bz2 linux-0a7ae2ff0d29bb3b327edff4c8ab67b3834fa811.zip | |
block: change the tag sync vs async restriction logic
Make them fully share the tag space, but disallow async requests using
the last any two slots.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/blkdev.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 564445be7a6d..a967dd775dbd 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -404,7 +404,7 @@ struct request_queue struct list_head tag_busy_list; unsigned int nr_sorted; - unsigned int in_flight; + unsigned int in_flight[2]; unsigned int rq_timeout; struct timer_list timeout; @@ -511,6 +511,11 @@ static inline void queue_flag_clear_unlocked(unsigned int flag, __clear_bit(flag, &q->queue_flags); } +static inline int queue_in_flight(struct request_queue *q) +{ + return q->in_flight[0] + q->in_flight[1]; +} + static inline void queue_flag_clear(unsigned int flag, struct request_queue *q) { WARN_ON_ONCE(!queue_is_locked(q)); |