[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/asm-x86_64/unistd.h b/include/asm-x86_64/unistd.h
index d767adc..6560439 100644
--- a/include/asm-x86_64/unistd.h
+++ b/include/asm-x86_64/unistd.h
@@ -561,8 +561,12 @@
__SYSCALL(__NR_request_key, sys_request_key)
#define __NR_keyctl 250
__SYSCALL(__NR_keyctl, sys_keyctl)
+#define __NR_ioprio_set 251
+__SYSCALL(__NR_ioprio_set, sys_ioprio_set)
+#define __NR_ioprio_get 252
+__SYSCALL(__NR_ioprio_get, sys_ioprio_get)
-#define __NR_syscall_max __NR_keyctl
+#define __NR_syscall_max __NR_ioprio_get
#ifndef __NO_STUBS
/* user-visible error numbers are in the range -1 - -4095 */