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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 88F61C43441 for ; Tue, 27 Nov 2018 10:12:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 587A72086B for ; Tue, 27 Nov 2018 10:12:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 587A72086B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730600AbeK0VJY (ORCPT ); Tue, 27 Nov 2018 16:09:24 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34190 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726405AbeK0VJX (ORCPT ); Tue, 27 Nov 2018 16:09:23 -0500 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CB7DBC058CB4; Tue, 27 Nov 2018 10:11:59 +0000 (UTC) Received: from [10.36.112.42] (ovpn-112-42.ams2.redhat.com [10.36.112.42]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1A82419C65; Tue, 27 Nov 2018 10:11:57 +0000 (UTC) Subject: Re: [PATCH 3/3] kvm: introduce manual dirty log reprotect To: Junaid Shahid , linux-kernel@vger.kernel.org, kvm@vger.kernel.org References: <1543251253-24762-1-git-send-email-pbonzini@redhat.com> <1543251253-24762-4-git-send-email-pbonzini@redhat.com> From: Paolo Bonzini Openpgp: preference=signencrypt Autocrypt: addr=pbonzini@redhat.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 27 Nov 2018 10:11:59 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 27/11/18 06:04, Junaid Shahid wrote: > There is a subtle point here which might be worth mentioning in a comment. [...] You're absolutely right, it's subtle and should be mentioned. >> @@ -2945,6 +3012,9 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) >> case KVM_CAP_IOEVENTFD_ANY_LENGTH: >> case KVM_CAP_CHECK_EXTENSION_VM: >> case KVM_CAP_ENABLE_CAP_VM: >> +#ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT >> + case KVM_CAP_MANUAL_DIRTY_LOG_PROTECT: >> +#endif > Shouldn't we also add this new CONFIG option to the Kconfig file? > It's already there. The new part is that if you are using it, you get manual reprotection for free. Paolo