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From: tip-bot for Konstantin Khlebnikov <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: efault@gmx.de, david.vrabel@citrix.com,
	linux-kernel@vger.kernel.org, hpa@zytor.com,
	boris.ostrovsky@oracle.com, paulus@samba.org, agraf@suse.de,
	mingo@kernel.org, tglx@linutronix.de,
	torvalds@linux-foundation.org, khlebnikov@yandex-team.ru,
	peterz@infradead.org
Subject: [tip:sched/core] sched/preempt, powerpc, kvm: Use need_resched() instead of should_resched()
Date: Mon, 3 Aug 2015 10:08:00 -0700	[thread overview]
Message-ID: <tip-c56dadf39761a6157239cac39e3988998c994f98@git.kernel.org> (raw)
In-Reply-To: <20150715095203.12246.72922.stgit@buzz>

Commit-ID:  c56dadf39761a6157239cac39e3988998c994f98
Gitweb:     http://git.kernel.org/tip/c56dadf39761a6157239cac39e3988998c994f98
Author:     Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
AuthorDate: Wed, 15 Jul 2015 12:52:03 +0300
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 3 Aug 2015 12:21:24 +0200

sched/preempt, powerpc, kvm: Use need_resched() instead of should_resched()

Function should_resched() is equal to (!preempt_count() && need_resched()).
In preemptive kernel preempt_count here is non-zero because of vc->lock.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Graf <agraf@suse.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20150715095203.12246.72922.stgit@buzz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/powerpc/kvm/book3s_hv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 68d067a..a9f753f 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -2178,7 +2178,7 @@ static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 		vc->runner = vcpu;
 		if (n_ceded == vc->n_runnable) {
 			kvmppc_vcore_blocked(vc);
-		} else if (should_resched()) {
+		} else if (need_resched()) {
 			vc->vcore_state = VCORE_PREEMPT;
 			/* Let something else run */
 			cond_resched_lock(&vc->lock);

  reply	other threads:[~2015-08-03 17:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-15  9:52 [PATCH v2 1/3] drivers/xen/preempt: use need_resched() instead of should_resched() Konstantin Khlebnikov
2015-07-15  9:52 ` [PATCH v2 2/3] KVM: PPC: Book3S HV: Use " Konstantin Khlebnikov
2015-08-03 17:08   ` tip-bot for Konstantin Khlebnikov [this message]
2015-07-15  9:52 ` [PATCH v2 3/3] sched/preempt: fix cond_resched_lock() and cond_resched_softirq() Konstantin Khlebnikov
2015-07-15 12:16   ` Eric Dumazet
2015-07-15 12:52     ` Konstantin Khlebnikov
2015-07-15 13:35       ` Peter Zijlstra
2015-08-03 17:08   ` [tip:sched/core] sched/preempt: Fix " tip-bot for Konstantin Khlebnikov
2015-07-20 13:41 ` [Xen-devel] [PATCH v2 1/3] drivers/xen/preempt: use need_resched() instead of should_resched() David Vrabel
2015-08-03 17:07 ` [tip:sched/core] sched/preempt, xen: Use " tip-bot for Konstantin Khlebnikov

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