From: Wanpeng Li <kernellwp@gmail.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
Paul Mackerras <paulus@ozlabs.org>
Subject: [PATCH 1/3] KVM: PPC: Book3S HV: exit halt polling on need_resched() as well
Date: Sat, 8 May 2021 17:31:48 +0800 [thread overview]
Message-ID: <1620466310-8428-1-git-send-email-wanpengli@tencent.com> (raw)
From: Wanpeng Li <wanpengli@tencent.com>
Inspired by commit 262de4102c7bb8 (kvm: exit halt polling on need_resched()
as well), due to PPC implements an arch specific halt polling logic, we should
add the need_resched() checking there as well.
Cc: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
arch/powerpc/kvm/book3s_hv.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 28a80d2..6199397 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -3936,7 +3936,8 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
break;
}
cur = ktime_get();
- } while (single_task_running() && ktime_before(cur, stop));
+ } while (single_task_running() && !need_resched() &&
+ ktime_before(cur, stop));
spin_lock(&vc->lock);
vc->vcore_state = VCORE_INACTIVE;
--
2.7.4
next reply other threads:[~2021-05-08 9:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-08 9:31 Wanpeng Li [this message]
2021-05-08 9:31 ` [PATCH 2/3] KVM: X86: Bail out of direct yield in case of undercomitted scenarios Wanpeng Li
2021-05-11 21:44 ` Sean Christopherson
2021-05-12 2:43 ` Wanpeng Li
2021-05-12 16:59 ` Sean Christopherson
2021-05-08 9:31 ` [PATCH 3/3] KVM: X86: Fix vCPU preempted state from guest point of view Wanpeng Li
2021-05-11 0:18 ` Sean Christopherson
2021-05-11 10:28 ` Wanpeng Li
2021-05-12 0:02 ` [PATCH 1/3] KVM: PPC: Book3S HV: exit halt polling on need_resched() as well Wanpeng Li
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