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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


             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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