#define IOPRIO_H
#include <linux/sched.h>
+#include <linux/iocontext.h>
/*
* Gives us 8 prio classes with 13-bits of data for each class
* the cpu scheduler nice value to an io priority
*/
#define IOPRIO_NORM (4)
-static inline int task_ioprio(struct task_struct *task)
+static inline int task_ioprio(struct io_context *ioc)
{
- if (ioprio_valid(task->ioprio))
- return IOPRIO_PRIO_DATA(task->ioprio);
+ if (ioprio_valid(ioc->ioprio))
+ return IOPRIO_PRIO_DATA(ioc->ioprio);
return IOPRIO_NORM;
}
-static inline int task_ioprio_class(struct task_struct *task)
+static inline int task_ioprio_class(struct io_context *ioc)
{
- if (ioprio_valid(task->ioprio))
- return IOPRIO_PRIO_CLASS(task->ioprio);
+ if (ioprio_valid(ioc->ioprio))
+ return IOPRIO_PRIO_CLASS(ioc->ioprio);
return IOPRIO_CLASS_BE;
}
return (task_nice(task) + 20) / 5;
}
+/*
+ * 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
*/