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 8E536CD54BE for ; Mon, 25 Sep 2023 20:24:27 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qks7f-00012K-8H; Mon, 25 Sep 2023 16:24:03 -0400 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 1qks7d-00010w-41 for qemu-devel@nongnu.org; Mon, 25 Sep 2023 16:24:01 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qks7a-00048v-Pd for qemu-devel@nongnu.org; Mon, 25 Sep 2023 16:24:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1695673437; 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: in-reply-to:in-reply-to:references:references; bh=Qlc+nPHSx2NwgwT/RoZzeDhzPQHRR3dOY/JarxS2lgU=; b=VpOTMyM11Cj3wiYN7WWLZKz2/DSOzs55e+95yNjKEPxtrm0uct2qX3UU4X3eeZ3LI69DNg W/NjunaH8K7xKDbP03DMv3eqyoc2rGt9IrHPbv5dlHolrAEKumhW2uJjcpQu1/Ohe8rdgs vgq0Gjgd1mkIsniI+FPygITJFucUw5E= 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-456-KoQCW5S8P3iYNvLSkILyMg-1; Mon, 25 Sep 2023 16:23:55 -0400 X-MC-Unique: KoQCW5S8P3iYNvLSkILyMg-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id F409685A5BA for ; Mon, 25 Sep 2023 20:23:54 +0000 (UTC) Received: from localhost (unknown [10.39.194.68]) by smtp.corp.redhat.com (Postfix) with ESMTP id 75A0D711286; Mon, 25 Sep 2023 20:23:54 +0000 (UTC) Date: Mon, 25 Sep 2023 16:23:53 -0400 From: Stefan Hajnoczi To: Hanna Czenczek Cc: qemu-devel@nongnu.org, virtio-fs@redhat.com, "Michael S . Tsirkin" , Eugenio =?iso-8859-1?Q?P=E9rez?= , German Maglione Subject: Re: [PATCH v3 4/5] vhost: Add high-level state save/load functions Message-ID: <20230925202353.GE323580@fedora> References: <20230915102531.55894-1-hreitz@redhat.com> <20230915102531.55894-5-hreitz@redhat.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="G1vLTDuBl/2qpJYj" Content-Disposition: inline In-Reply-To: <20230915102531.55894-5-hreitz@redhat.com> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Received-SPF: pass client-ip=170.10.133.124; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=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 --G1vLTDuBl/2qpJYj Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Sep 15, 2023 at 12:25:29PM +0200, Hanna Czenczek wrote: > vhost_save_backend_state() and vhost_load_backend_state() can be used by > vhost front-ends to easily save and load the back-end's state to/from > the migration stream. >=20 > Because we do not know the full state size ahead of time, > vhost_save_backend_state() simply reads the data in 1 MB chunks, and > writes each chunk consecutively into the migration stream, prefixed by > its length. EOF is indicated by a 0-length chunk. >=20 > Signed-off-by: Hanna Czenczek > --- > include/hw/virtio/vhost.h | 35 +++++++ > hw/virtio/vhost.c | 204 ++++++++++++++++++++++++++++++++++++++ > 2 files changed, 239 insertions(+) Reviewed-by: Stefan Hajnoczi --G1vLTDuBl/2qpJYj Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAmUR7FkACgkQnKSrs4Gr c8g53gf/efNh2hqj0IptWY7I+2HpZ9C+MMwAw60jvMILi4MzWiZAJt625pYSEqB6 eR0ov0YpFTrcOAtiKyREswaYnZ5bLQMppoocjQh/qApgiOXR+7ugaW87Pj6itGf5 yMenJBO7gURkeXfmFSUNzhiev5XOrKuSbw1IwWXEFzXIstT/dDujfYZ5Pr/M4Fjs aKbo/dAmPxUP3OzVSZe49igboCIHKop+6WH3d3kQlLb5mlNcbldDtg4scRKq9IRY slf5P/Cs47CpHbo5+USYEMg2FYA5tbU7+dlo3rd88e1Xkp9TDnVdpx1Akkmtke8j 3fjYbcZ3uF2xHGxGejCKm1G/3Cg7xg== =kLNj -----END PGP SIGNATURE----- --G1vLTDuBl/2qpJYj--