diff options
| author | Jens Axboe <jens.axboe@oracle.com> | 2008-05-07 09:51:23 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-05-07 09:51:23 +0200 |
| commit | 6d63c275572d1e6f00d4fa154f16fbb0d8c2d2bf (patch) | |
| tree | 715f4bab902f117c958a929e44cd0b2257e3be29 /include | |
| parent | dbaf2c003e151ad9231778819b0977f95e20e06f (diff) | |
cfq-iosched: make io priorities inherit CPU scheduling class as well as nice
We currently set all processes to the best-effort scheduling class,
regardless of what CPU scheduling class they belong to. Improve that
so that we correctly track idle and rt scheduling classes as well.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ioprio.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/ioprio.h b/include/linux/ioprio.h index 2a3bb1bb743..f98a656b17e 100644 --- a/include/linux/ioprio.h +++ b/include/linux/ioprio.h @@ -68,6 +68,20 @@ static inline int task_nice_ioprio(struct task_struct *task) } /* + * This is for the case where the task hasn't asked for a specific IO class. + * Check for idle and rt task process, and return appropriate IO class. + */ +static inline int task_nice_ioclass(struct task_struct *task) +{ + if (task->policy == SCHED_IDLE) + return IOPRIO_CLASS_IDLE; + else if (task->policy == SCHED_FIFO || task->policy == SCHED_RR) + return IOPRIO_CLASS_RT; + else + return IOPRIO_CLASS_BE; +} + +/* * For inheritance, return the highest of the two given priorities */ extern int ioprio_best(unsigned short aprio, unsigned short bprio); |