For SCHED_ISO and SCHED_IDLEPRIO tasks where no ioprio is explicitly set:
Set ioprio to best priority normal class for SCHED_ISO tasks.
Set ioprio to idle class for SCHED_IDLEPRIO tasks.
Signed-off-by: Con Kolivas <[email protected]>
---
block/cfq-iosched.c | 2 ++
include/linux/ioprio.h | 6 ++++++
2 files changed, 8 insertions(+)
Index: linux-ck-dev/include/linux/ioprio.h
===================================================================
--- linux-ck-dev.orig/include/linux/ioprio.h 2006-06-18 15:23:53.000000000 +1000
+++ linux-ck-dev/include/linux/ioprio.h 2006-06-18 15:23:56.000000000 +1000
@@ -56,6 +56,8 @@ static inline enum ioprio_class
{
if (rt_task(task))
return IOPRIO_CLASS_RT;
+ if (idleprio_task(task))
+ return IOPRIO_CLASS_IDLE;
return IOPRIO_CLASS_BE;
}
@@ -64,6 +66,10 @@ static inline int task_nice_ioprio(struc
if (rt_task(task))
return (MAX_RT_PRIO - task->rt_priority) * IOPRIO_BE_NR /
MAX_RT_PRIO;
+ if (iso_task(task))
+ return 0;
+ if (idleprio_task(task))
+ return IOPRIO_BE_NR - 1;
return (task_nice(task) + 20) / 5;
}
Index: linux-ck-dev/block/cfq-iosched.c
===================================================================
--- linux-ck-dev.orig/block/cfq-iosched.c 2006-06-18 15:23:53.000000000 +1000
+++ linux-ck-dev/block/cfq-iosched.c 2006-06-18 15:23:56.000000000 +1000
@@ -1358,6 +1358,8 @@ static void cfq_init_prio_data(struct cf
*/
cfqq->ioprio_class = task_policy_ioprio_class(tsk);
cfqq->ioprio = task_nice_ioprio(tsk);
+ if (cfqq->ioprio_class == IOPRIO_CLASS_IDLE)
+ cfq_clear_cfqq_idle_window(cfqq);
break;
case IOPRIO_CLASS_RT:
cfqq->ioprio = task_ioprio(tsk);
--
-ck
-
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