From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3AA9C76191 for ; Thu, 18 Jul 2019 13:47:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C832E20873 for ; Thu, 18 Jul 2019 13:47:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726665AbfGRNrW (ORCPT ); Thu, 18 Jul 2019 09:47:22 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:59958 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727730AbfGRNrW (ORCPT ); Thu, 18 Jul 2019 09:47:22 -0400 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x6IDiRfC099246 for ; Thu, 18 Jul 2019 09:47:21 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ttq5cqey6-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 18 Jul 2019 09:47:20 -0400 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 18 Jul 2019 14:47:15 +0100 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x6IDlESv38470070 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 18 Jul 2019 13:47:14 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A4238A4054; Thu, 18 Jul 2019 13:47:14 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5E8ACA4062; Thu, 18 Jul 2019 13:47:14 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.152.224.115]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 18 Jul 2019 13:47:14 +0000 (GMT) Subject: Re: [PATCH 2/2] KVM: s390: Use kvm_vcpu_wake_up in kvm_s390_vcpu_wakeup To: Paolo Bonzini , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: wanpengli@tencent.com, rkrcmar@redhat.com, paulus@ozlabs.org, maz@kernel.org References: <1563457031-21189-1-git-send-email-pbonzini@redhat.com> <1563457031-21189-3-git-send-email-pbonzini@redhat.com> From: Christian Borntraeger Openpgp: preference=signencrypt Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <1563457031-21189-3-git-send-email-pbonzini@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 19071813-0012-0000-0000-000003341491 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19071813-0013-0000-0000-0000216D96E4 Message-Id: <2af3fb79-61ae-d361-24d7-665cf9638e0b@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-07-18_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=769 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907180144 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 18.07.19 15:37, Paolo Bonzini wrote: > From: Wanpeng Li > > Use kvm_vcpu_wake_up() in kvm_s390_vcpu_wakeup(). > > Suggested-by: Paolo Bonzini > Cc: Paolo Bonzini > Cc: Radim Krčmář > Cc: Christian Borntraeger > Signed-off-by: Wanpeng Li > Signed-off-by: Paolo Bonzini > --- > v2->v3: no need to set vcpu->ready here > arch/s390/kvm/interrupt.c | 23 +++-------------------- > 1 file changed, 3 insertions(+), 20 deletions(-) Reviewed-by: Christian Borntraeger > > diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c > index 26f8bf4a22a7..b5fd6e85657c 100644 > --- a/arch/s390/kvm/interrupt.c > +++ b/arch/s390/kvm/interrupt.c > @@ -1224,28 +1224,11 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) > > void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) > { > - /* > - * We cannot move this into the if, as the CPU might be already > - * in kvm_vcpu_block without having the waitqueue set (polling) > - */ > vcpu->valid_wakeup = true; > + kvm_vcpu_wake_up(vcpu); > + > /* > - * This is mostly to document, that the read in swait_active could > - * be moved before other stores, leading to subtle races. > - * All current users do not store or use an atomic like update > - */ > - smp_mb__after_atomic(); > - if (swait_active(&vcpu->wq)) { > - /* > - * The vcpu gave up the cpu voluntarily, mark it as a good > - * yield-candidate. > - */ > - WRITE_ONCE(vcpu->ready, true); > - swake_up_one(&vcpu->wq); > - vcpu->stat.halt_wakeup++; > - } > - /* > - * The VCPU might not be sleeping but is executing the VSIE. Let's > + * The VCPU might not be sleeping but rather executing VSIE. Let's > * kick it, so it leaves the SIE to process the request. > */ > kvm_s390_vsie_kick(vcpu); >