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From: Kirill Tkhai <tkhai@yandex.ru>
To: linux-kernel@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Kirill Tkhai <ktkhai@parallels.com>
Subject: [PATCH 1/7] sched/fair: Remove duplicate code from can_migrate_task()
Date: Sat, 20 Sep 2014 20:51:16 +0400	[thread overview]
Message-ID: <20140920165116.16299.1381.stgit@localhost> (raw)

From: Kirill Tkhai <ktkhai@parallels.com>

Two branches do the same, so we can combine them and get
rid of duplicate code.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
---
 kernel/sched/fair.c |   16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 74fa2c2..fa13f94 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5292,24 +5292,12 @@ int can_migrate_task(struct task_struct *p, struct lb_env *env)
 	if (!tsk_cache_hot)
 		tsk_cache_hot = migrate_degrades_locality(p, env);
 
-	if (migrate_improves_locality(p, env)) {
-#ifdef CONFIG_SCHEDSTATS
+	if (migrate_improves_locality(p, env) || !tsk_cache_hot ||
+	    env->sd->nr_balance_failed > env->sd->cache_nice_tries) {
 		if (tsk_cache_hot) {
 			schedstat_inc(env->sd, lb_hot_gained[env->idle]);
 			schedstat_inc(p, se.statistics.nr_forced_migrations);
 		}
-#endif
-		return 1;
-	}
-
-	if (!tsk_cache_hot ||
-		env->sd->nr_balance_failed > env->sd->cache_nice_tries) {
-
-		if (tsk_cache_hot) {
-			schedstat_inc(env->sd, lb_hot_gained[env->idle]);
-			schedstat_inc(p, se.statistics.nr_forced_migrations);
-		}
-
 		return 1;
 	}
 


             reply	other threads:[~2014-09-20 16:51 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-20 16:51 Kirill Tkhai [this message]
2014-09-20 16:51 ` [PATCH 2/7] sched: Fix picking a task switching on other cpu (__ARCH_WANT_UNLOCKED_CTXSW) Kirill Tkhai
2014-09-20 18:33   ` Peter Zijlstra
2014-09-20 18:54     ` Peter Zijlstra
2014-09-20 20:09       ` Kirill Tkhai
2014-09-20 20:19         ` Kirill Tkhai
2014-09-20 19:03     ` Peter Zijlstra
2014-09-20 16:51 ` [PATCH 3/7] sched: Use dl_bw_of() under RCU read lock Kirill Tkhai
2014-09-20 18:57   ` Peter Zijlstra
2014-09-20 19:25     ` Kirill Tkhai
2014-09-20 19:32       ` Peter Zijlstra
2014-09-20 16:51 ` [PATCH 4/7] sched: cleanup: Rename out_unlock to out_free_new_mask Kirill Tkhai
2014-09-20 16:51 ` [PATCH 5/7] sched: Use rq->rd in sched_setaffinity() under RCU read lock Kirill Tkhai
2014-09-20 18:59   ` Peter Zijlstra
2014-09-20 19:05     ` Kirill Tkhai
2014-09-20 19:18       ` Peter Zijlstra
2014-09-20 19:21         ` Kirill Tkhai
2014-09-20 16:51 ` [PATCH 6/7] sched: Delete rq::skip_clock_update == -1 Kirill Tkhai
2014-09-20 19:01   ` Peter Zijlstra
2014-09-21  4:37     ` Mike Galbraith
2014-09-20 16:51 ` [PATCH 7/7] sched/rt: Use resched_curr() in task_tick_rt() Kirill Tkhai

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