From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Tue, 29 Aug 2017 13:26:59 +0200 (CEST) Received: from mx1.redhat.com ([209.132.183.28]:36152 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S23994929AbdH2L0tn1s9V convert rfc822-to-8bit (ORCPT ); Tue, 29 Aug 2017 13:26:49 +0200 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 778097EA91; Tue, 29 Aug 2017 11:26:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 778097EA91 Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=cohuck@redhat.com Received: from gondolin (dhcp-192-215.str.redhat.com [10.33.192.215]) by smtp.corp.redhat.com (Postfix) with ESMTP id 36A1666D62; Tue, 29 Aug 2017 11:26:38 +0000 (UTC) Date: Tue, 29 Aug 2017 13:26:35 +0200 From: Cornelia Huck To: Radim =?UTF-8?B?S3LEjW3DocWZ?= Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-mips@linux-mips.org, kvm-ppc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Paolo Bonzini , David Hildenbrand , Christoffer Dall , Marc Zyngier , Christian Borntraeger , James Hogan , Paul Mackerras , Alexander Graf Subject: Re: [PATCH RFC v3 1/9] KVM: s390: optimize detection of started vcpus Message-ID: <20170829132635.23941a6f.cohuck@redhat.com> In-Reply-To: <20170821203530.9266-2-rkrcmar@redhat.com> References: <20170821203530.9266-1-rkrcmar@redhat.com> <20170821203530.9266-2-rkrcmar@redhat.com> Organization: Red Hat GmbH MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Tue, 29 Aug 2017 11:26:43 +0000 (UTC) Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 59858 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: cohuck@redhat.com Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips On Mon, 21 Aug 2017 22:35:22 +0200 Radim Krčmář wrote: > We can add a variable instead of scanning all online VCPUs to know how > many are started. We can't trivially tell which VCPU is the last one, > though. > > Suggested-by: Cornelia Huck > Signed-off-by: Radim Krčmář > --- > arch/s390/include/asm/kvm_host.h | 1 + > arch/s390/kvm/kvm-s390.c | 39 +++++++++++++++------------------------ > 2 files changed, 16 insertions(+), 24 deletions(-) Modulo the bug noticed by Christian, I think this looks good.