linux-kernel - [PATCH v2 4/5] KVM: s390: vsie: Move conditional reschedule

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Message-Id: <20200403153050.20569-5-david@redhat.com>
Date:   Fri,  3 Apr 2020 17:30:49 +0200
From:   David Hildenbrand <david@...hat.com>
To:     kvm@...r.kernel.org
Cc:     linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        David Hildenbrand <david@...hat.com>
Subject: [PATCH v2 4/5] KVM: s390: vsie: Move conditional reschedule

Let's move it to the outer loop, in case we ever run again into long
loops, trying to map the prefix. While at it, convert it to cond_resched().

Signed-off-by: David Hildenbrand <david@...hat.com>
---
 arch/s390/kvm/vsie.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index 4f6c22d72072..ef05b4e167fb 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -1000,8 +1000,6 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
 
 	handle_last_fault(vcpu, vsie_page);
 
-	if (need_resched())
-		schedule();
 	if (test_cpu_flag(CIF_MCCK_PENDING))
 		s390_handle_mcck();
 
@@ -1185,6 +1183,7 @@ static int vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
 		    kvm_s390_vcpu_has_irq(vcpu, 0) ||
 		    kvm_s390_vcpu_sie_inhibited(vcpu))
 			break;
+		cond_resched();
 	}
 
 	if (rc == -EFAULT) {
-- 
2.25.1