sched: Transform resched_task() into resched_curr()
authorKirill Tkhai <tkhai@yandex.ru>
Sat, 28 Jun 2014 20:03:57 +0000 (00:03 +0400)
committerIngo Molnar <mingo@kernel.org>
Wed, 16 Jul 2014 11:38:19 +0000 (13:38 +0200)
commit8875125efe8402c4d84b08291e68f1281baba8e2
tree2957c181dd06189a1499e09836c5fe5c3932a0b3
parent466af29bf4270e84261712428a1304c28e3743fa
sched: Transform resched_task() into resched_curr()

We always use resched_task() with rq->curr argument.
It's not possible to reschedule any task but rq's current.

The patch introduces resched_curr(struct rq *) to
replace all of the repeating patterns. The main aim
is cleanup, but there is a little size profit too:

  (before)
$ size kernel/sched/built-in.o
   text    data     bss     dec     hex filename
155274   16445    7042  178761   2ba49 kernel/sched/built-in.o

$ size vmlinux
   text    data     bss     dec     hex filename
7411490 1178376  991232 9581098  92322a vmlinux

  (after)
$ size kernel/sched/built-in.o
   text    data     bss     dec     hex filename
155130   16445    7042  178617   2b9b9 kernel/sched/built-in.o

$ size vmlinux
   text    data     bss     dec     hex filename
7411362 1178376  991232 9580970  9231aa vmlinux

I was choosing between resched_curr() and resched_rq(),
and the first name looks better for me.

A little lie in Documentation/trace/ftrace.txt. I have not
actually collected the tracing again. With a hope the patch
won't make execution times much worse :)

Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20140628200219.1778.18735.stgit@localhost
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Documentation/trace/ftrace.txt
include/linux/sched.h
kernel/sched/core.c
kernel/sched/deadline.c
kernel/sched/fair.c
kernel/sched/idle_task.c
kernel/sched/rt.c
kernel/sched/sched.h