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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 6 Apr 2020 16:06:21 +0100 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 036F6fOR45940938 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 6 Apr 2020 15:06:41 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6E972A405B; Mon, 6 Apr 2020 15:06:41 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F09F2A405C; Mon, 6 Apr 2020 15:06:40 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.145.23.63]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 6 Apr 2020 15:06:40 +0000 (GMT) Subject: Re: [PATCH v2 4/5] KVM: s390: vsie: Move conditional reschedule To: David Hildenbrand , kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, Vasily Gorbik , Heiko Carstens , Cornelia Huck , Janosch Frank References: <20200403153050.20569-1-david@redhat.com> <20200403153050.20569-5-david@redhat.com> From: Christian Borntraeger Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200403153050.20569-5-david@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 20040615-4275-0000-0000-000003BAB9FF X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20040615-4276-0000-0000-000038D01807 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-06_08:2020-04-06,2020-04-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 malwarescore=0 suspectscore=0 impostorscore=0 bulkscore=0 lowpriorityscore=0 phishscore=0 spamscore=0 mlxlogscore=830 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004060123 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03.04.20 17:30, David Hildenbrand wrote: > 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 Reviewed-by: Christian Borntraeger > --- > 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) { >