From nobody Tue Sep 9 03:11:49 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.libvirt.org designates 8.43.85.245 as permitted sender) client-ip=8.43.85.245; envelope-from=devel-bounces@lists.libvirt.org; helo=lists.libvirt.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of lists.libvirt.org designates 8.43.85.245 as permitted sender) smtp.mailfrom=devel-bounces@lists.libvirt.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.libvirt.org (lists.libvirt.org [8.43.85.245]) by mx.zohomail.com with SMTPS id 1737626690711122.58602457020822; Thu, 23 Jan 2025 02:04:50 -0800 (PST) Received: by lists.libvirt.org (Postfix, from userid 996) id 18A791497; Thu, 23 Jan 2025 05:04:50 -0500 (EST) Received: from lists.libvirt.org (localhost [IPv6:::1]) by lists.libvirt.org (Postfix) with ESMTP id 63E7E13AC; Thu, 23 Jan 2025 05:04:18 -0500 (EST) Received: by lists.libvirt.org (Postfix, from userid 996) id BCD73134F; Thu, 23 Jan 2025 05:04:13 -0500 (EST) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.libvirt.org (Postfix) with ESMTPS id 43B66134D for ; Thu, 23 Jan 2025 05:04:13 -0500 (EST) Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-321-fcUXQtc1OBKW_IY7FzXIPw-1; Thu, 23 Jan 2025 05:04:11 -0500 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7B946195609E for ; Thu, 23 Jan 2025 10:04:10 +0000 (UTC) Received: from orkuz (unknown [10.43.3.115]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id DD99F19560AD for ; Thu, 23 Jan 2025 10:04:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on lists.libvirt.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,RCVD_IN_VALIDITY_RPBL_BLOCKED, RCVD_IN_VALIDITY_SAFE_BLOCKED,SPF_HELO_NONE autolearn=unavailable autolearn_force=no version=3.4.4 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1737626653; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=21pzlY6zKjZXsWZbG309UnsyZRuqRqt1GBw0bJP2nEI=; b=hcMslxjIv+TVe5DxS6ZtLR61NYNsd2RCsfYNsVeE5TQFx/qP8w28JDfypfdlcuo7s4nGMj PO2+K5+JTCd/WzkxfD8SPSP7htb5hyYyTsZbR/bGb+9ebb26N9X7rOf90484IaIRHz22j7 lhYQ+T6gTQcSkQrf9rEs7L0FVnSFJoc= X-MC-Unique: fcUXQtc1OBKW_IY7FzXIPw-1 X-Mimecast-MFC-AGG-ID: fcUXQtc1OBKW_IY7FzXIPw From: Jiri Denemark To: devel@lists.libvirt.org Subject: [PATCH 1/3] Add a migration parameter for available bandwidth in switchover Date: Thu, 23 Jan 2025 11:04:02 +0100 Message-ID: In-Reply-To: References: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: _waKz2x5617stXbJkA-HlGupFD0T06o1NfyiPCj1psA_1737626650 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Message-ID-Hash: H5XRFXVBSU6TZWQIWNREQ4TGDHU3CU3O X-Message-ID-Hash: H5XRFXVBSU6TZWQIWNREQ4TGDHU3CU3O X-MailFrom: jdenemar@redhat.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-config-1; header-match-config-2; header-match-config-3; header-match-devel.lists.libvirt.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header X-Mailman-Version: 3.2.2 Precedence: list List-Id: Development discussions about the libvirt library & tools Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1737626693087019000 Content-Type: text/plain; charset="utf-8" The new VIR_MIGRATE_PARAM_BANDWIDTH_AVAIL_SWITCHOVER parameter can be used to override the estimated bandwidth that can be used for transferring guest memory and device state once virtual CPUs are stopped. Signed-off-by: Jiri Denemark --- include/libvirt/libvirt-domain.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-dom= ain.h index 2a4b81f4df..74016c6c46 100644 --- a/include/libvirt/libvirt-domain.h +++ b/include/libvirt/libvirt-domain.h @@ -1206,6 +1206,24 @@ typedef enum { */ # define VIR_MIGRATE_PARAM_BANDWIDTH_POSTCOPY "bandwidth.postcopy" =20 +/** + * VIR_MIGRATE_PARAM_BANDWIDTH_AVAIL_SWITCHOVER: + * + * virDomainMigrate* params field: the bandwidth (in MiB/s) available for = the + * final phase of (pre-copy) migration during which CPUs are stopped and a= ll + * the remaining memory and device state is transferred. Knowing this band= width + * is important for accurate estimation of the domain downtime and deciding + * the right moment for switching over. Normally this would be estimated b= ased + * on the bandwidth used by migration, but this could be lower than the ac= tual + * available bandwidth. Using this parameter to override the computed valu= e may + * help with migration convergence when the migration would keep iterating= over + * and over thinking there's not enough bandwidth to comply with the confi= gured + * maximum downtime. + * + * Since: 11.1.0 + */ +# define VIR_MIGRATE_PARAM_BANDWIDTH_AVAIL_SWITCHOVER "bandwidth.avail.swi= tchover" + /** * VIR_MIGRATE_PARAM_GRAPHICS_URI: * --=20 2.48.1