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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D22D0C4332F for ; Sat, 3 Dec 2022 09:14:28 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p1Oaw-0001fc-80; Sat, 03 Dec 2022 04:14:02 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p1Oau-0001fT-GW for qemu-devel@nongnu.org; Sat, 03 Dec 2022 04:14:00 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p1Oas-0004k6-Du for qemu-devel@nongnu.org; Sat, 03 Dec 2022 04:13:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1670058837; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=OvceZRkKvOPJfakrN4zUGvZw79x2SgjtCexydoFDtPA=; b=fV+e0+Y2n07s2jpF3RRCkewgpzVJq6n2gEtGoS6LcA6dHs6hPTzBVc7BiLjW2EnRPzYiX7 lJyHvZqAL4g7jVUqUBOIR25K5xgLifOHn/88qjcmLQcUXolI3fZrC3cpPQOzSzIyatXzx0 DJvM/bHXoRx+6zo08GMvqMkKLiLw7I0= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-529-WUJ87E1dN1mONyKD-buHRg-1; Sat, 03 Dec 2022 04:13:53 -0500 X-MC-Unique: WUJ87E1dN1mONyKD-buHRg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 24F1B185A792; Sat, 3 Dec 2022 09:13:53 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.39.192.19]) by smtp.corp.redhat.com (Postfix) with ESMTPS id EA7E32166B2A; Sat, 3 Dec 2022 09:13:52 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id D6F3321E6921; Sat, 3 Dec 2022 10:13:49 +0100 (CET) From: Markus Armbruster To: huangy81@chinatelecom.cn Cc: qemu-devel , Peter Xu , "Dr. David Alan Gilbert" , Paolo Bonzini , Laurent Vivier , Eric Blake , Juan Quintela , Thomas Huth , Peter Maydell , Richard Henderson Subject: Re: [PATCH v2 05/11] qapi/migration: Introduce vcpu-dirty-limit parameters References: <3fe7b2324c350b65f2a6fe6e4c585e9de5402e0c.1669047366.git.huangy81@chinatelecom.cn> Date: Sat, 03 Dec 2022 10:13:49 +0100 In-Reply-To: <3fe7b2324c350b65f2a6fe6e4c585e9de5402e0c.1669047366.git.huangy81@chinatelecom.cn> (huangy's message of "Mon, 21 Nov 2022 11:26:37 -0500") Message-ID: <87sfhwonn6.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Received-SPF: pass client-ip=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org huangy81@chinatelecom.cn writes: > From: Hyman Huang(=E9=BB=84=E5=8B=87) > > Introduce "vcpu-dirty-limit" migration parameter used > to limit dirty page rate during live migration. > > "vcpu-dirty-limit" and "x-vcpu-dirty-limit-period" are > two dirty-limit-related migration parameters, which can > be set before and during live migration by qmp > migrate-set-parameters. > > This two parameters are used to help implement the dirty > page rate limit algo of migration. > > Signed-off-by: Hyman Huang(=E9=BB=84=E5=8B=87) Could you explain briefly why x-vcpu-dirty-limit-period is experimental, and vcpu-dirty-limit is not?