[PATCH] Update cfq io scheduler to time sliced design
This updates the CFQ io scheduler to the new time sliced design (cfq
v3). It provides full process fairness, while giving excellent
aggregate system throughput even for many competing processes. It
supports io priorities, either inherited from the cpu nice value or set
directly with the ioprio_get/set syscalls. The latter closely mimic
set/getpriority.
This import is based on my latest from -mm.
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 1262cb4..d5c3fe1 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -14,11 +14,13 @@
* Yes, writeback.h requires sched.h
* No, sched.h is not included from here.
*/
-static inline int current_is_pdflush(void)
+static inline int task_is_pdflush(struct task_struct *task)
{
- return current->flags & PF_FLUSHER;
+ return task->flags & PF_FLUSHER;
}
+#define current_is_pdflush() task_is_pdflush(current)
+
/*
* fs/fs-writeback.c
*/