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 B1A93E9271C for ; Thu, 5 Oct 2023 17:47:35 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qoSR0-0006cA-Ms; Thu, 05 Oct 2023 13:46:50 -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 1qoSQy-0006bs-L0 for qemu-devel@nongnu.org; Thu, 05 Oct 2023 13:46:48 -0400 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 1qoSQx-0005cp-87 for qemu-devel@nongnu.org; Thu, 05 Oct 2023 13:46:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1696528006; 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=oCEx+e7zhURH47CTIYcozc8nPDJG7sAi2IbfSeAF2H0=; b=hn9FPqZ/6i0v8BUE3sKLYTEDhzNRDNkonsmZiv1FQiZFZXt7WE43bLEpYFxeopNO54eRon OZzrTBGSbKjPVLRb0pAHApf1Quq/PDQA5wN/MKP9rJ35zNRzCpBDVsR4zt3Xb0R5r8ADz1 gnnQ7y1+24uOL3zgKEvfiG84t+Ybur8= 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-331-KSuavLKiPiO4kRPFalwbmA-1; Thu, 05 Oct 2023 13:46:41 -0400 X-MC-Unique: KSuavLKiPiO4kRPFalwbmA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (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 9C7091875054; Thu, 5 Oct 2023 17:46:41 +0000 (UTC) Received: from localhost (unknown [10.39.192.20]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1864A40C6EA8; Thu, 5 Oct 2023 17:46:40 +0000 (UTC) Date: Thu, 5 Oct 2023 13:46:39 -0400 From: Stefan Hajnoczi To: Hanna Czenczek Cc: qemu-devel@nongnu.org, virtio-fs@redhat.com, "Michael S . Tsirkin" , German Maglione , Eugenio =?iso-8859-1?Q?P=E9rez?= , Anton Kuchin Subject: Re: [PATCH v4 7/8] vhost: Add high-level state save/load functions Message-ID: <20231005174639.GH1342722@fedora> References: <20231004125904.110781-1-hreitz@redhat.com> <20231004125904.110781-8-hreitz@redhat.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="8SCwRJLZuG5agDQG" Content-Disposition: inline In-Reply-To: <20231004125904.110781-8-hreitz@redhat.com> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 Received-SPF: pass client-ip=170.10.129.124; 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_H4=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 --8SCwRJLZuG5agDQG Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Oct 04, 2023 at 02:59:03PM +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 > Reviewed-by: Stefan Hajnoczi > 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 --8SCwRJLZuG5agDQG Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAmUe9n8ACgkQnKSrs4Gr c8hHRwgAsniNhUQF6fB3+pYk91OUG/cI8VpaQx+w5MzEm7V9JLDFr95NlSEa2AwE Ujxpk47hsn0XcTvZw24iPuTQCORllr3KZaghJHRh4C9f4HYq99n5CGU3qfSBjcgi 5Bu7h3H0pa9rb2W1hzYHDCquuEVMBMG2Y29VuHRUx3oTpcrWozLe9YiTJnfP5S+P sqMTLc0HXKmeIOh8pcEA6i7tKkRE/baIjivjE/nIlO13hmdXFMqYitMJNWWlhlOQ BBdh07Y7LD40a7J0O9+PJsmvkOcaHCjRHjcdkeRviDLkKrBTim6+x5A2JCXTHu4r W+7G3WTBe5vuFfhkHp2dMispEbYm6A== =oRVw -----END PGP SIGNATURE----- --8SCwRJLZuG5agDQG--