linux-kernel - [RFC -v6 PATCH 5/8] sched: drop superfluous tests from yield

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Message-ID: <20110120163722.476accf5@annuminas.surriel.com>
Date:	Thu, 20 Jan 2011 16:37:22 -0500
From:	Rik van Riel <riel@...hat.com>
To:	kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Avi Kiviti <avi@...hat.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>,
	Chris Wright <chrisw@...s-sol.org>, ttracy@...hat.com,
	dshaks@...hat.com, "Nakajima, Jun" <jun.nakajima@...el.com>
Subject: [RFC -v6 PATCH 5/8] sched: drop superfluous tests from yield_to

Fairness is enforced by pick_next_entity, so we can drop some
superfluous tests from yield_to.

Signed-off-by: Rik van Riel <riel@...hat.com>
---
 kernel/sched.c |    8 --------
 1 files changed, 0 insertions(+), 8 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 1f38ed2..398eedf 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5307,14 +5307,6 @@ again:
 	if (task_running(p_rq, p) || p->state)
 		goto out;
 
-	if (!same_thread_group(p, curr))
-		goto out;
-
-#ifdef CONFIG_FAIR_GROUP_SCHED
-	if (task_group(p) != task_group(curr))
-		goto out;
-#endif
-
 	yielded = curr->sched_class->yield_to_task(rq, p, preempt);
 
 out:
--
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