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=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 E92B6C433ED for ; Wed, 12 May 2021 16:20:55 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 6197B61442 for ; Wed, 12 May 2021 16:20:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6197B61442 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44208 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lgrbS-0007ID-91 for qemu-devel@archiver.kernel.org; Wed, 12 May 2021 12:20:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38990) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lgra4-0005Oo-0Z for qemu-devel@nongnu.org; Wed, 12 May 2021 12:19:28 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:21175) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lgrZx-0004tA-V9 for qemu-devel@nongnu.org; Wed, 12 May 2021 12:19:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620836360; 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=R4xa8l4NsiRnXkHfLJ0MtU4VjOrS7GFvlq/3AoHR0fw=; b=UDZzuHdlU9n/UXD2dUsogSnc7fbAxC+VDcZCMzXpfa2VrQOCUXuTE8Tk2/IP6dA+xYQD+C OhN0sKKkJYfJEASCbl6XC6YoXSmuU3Pxbp6eeeCftm3ePIni7qJZTOdysQdus9qu1nj0Co uZAi/Scl01iKuZzEuk9bWSvTA62SJg8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-11-AXNdX3A4MBy1pMjG3IklpA-1; Wed, 12 May 2021 12:19:16 -0400 X-MC-Unique: AXNdX3A4MBy1pMjG3IklpA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9BBC6195D561; Wed, 12 May 2021 16:19:14 +0000 (UTC) Received: from localhost (ovpn-115-51.ams2.redhat.com [10.36.115.51]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1EC3A60CE6; Wed, 12 May 2021 16:19:03 +0000 (UTC) Date: Wed, 12 May 2021 17:19:02 +0100 From: Stefan Hajnoczi To: Steve Sistare Subject: Re: [PATCH V3 07/22] cpr Message-ID: References: <1620390320-301716-1-git-send-email-steven.sistare@oracle.com> <1620390320-301716-8-git-send-email-steven.sistare@oracle.com> MIME-Version: 1.0 In-Reply-To: <1620390320-301716-8-git-send-email-steven.sistare@oracle.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=stefanha@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="QOWwRyHgJNb5sZe7" Content-Disposition: inline Received-SPF: pass client-ip=216.205.24.124; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.7, 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_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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Daniel P. Berrange" , "Michael S. Tsirkin" , Jason Zeng , Alex =?iso-8859-1?Q?Benn=E9e?= , Juan Quintela , qemu-devel@nongnu.org, "Dr. David Alan Gilbert" , Alex Williamson , =?iso-8859-1?Q?Marc-Andr=E9?= Lureau , Paolo Bonzini , Philippe =?iso-8859-1?Q?Mathieu-Daud=E9?= , Markus Armbruster Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --QOWwRyHgJNb5sZe7 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Fri, May 07, 2021 at 05:25:05AM -0700, Steve Sistare wrote: > To use the restart mode, qemu must be started with the memfd-alloc machine > option. The memfd's are saved to the environment and kept open across exec, > after which they are found from the environment and re-mmap'd. Hence guest > ram is preserved in place, albeit with new virtual addresses in the qemu > process. The caller resumes the guest by calling cprload, which loads > state from the file. If the VM was running at cprsave time, then VM > execution resumes. cprsave supports any type of guest image and block > device, but the caller must not modify guest block devices between cprsave > and cprload. Does QEMU's existing -object memory-backend-file on tmpfs or hugetlbfs achieve the same thing? --QOWwRyHgJNb5sZe7 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAmCb//YACgkQnKSrs4Gr c8hCVgf/WOFBw0WYlB8ie88F+sh5RSuhKmk6EU+zkOpuKyvTI+Mbp/LZGOrYdngz F7FAZd8/t6/iBpwM8SAuDmhCFjvm6Fez1jlMZqvRslJ1hfLDvwut5Z1xiHWjPuOm 6w0ygmZl3ICQq5s44yn/mJaByhHOK1MVHdXUdVUxMAuQ+hxD/9cSo0VWvh7/YCe8 72gyCrj4Wrn84StgyjSexgqpl2kQ7c/USPgm70V2d0+lFEZTl+y5xML0yN6zoy70 0Ji6hze5A8JJoz7JElSajhvMbzzV9lRIBOb1wFAhXbWXlIrdq5lhNSZg/0D68tjR r9SIIdAbdD7LUsAxdBCCOk3q80HwrQ== =zMNj -----END PGP SIGNATURE----- --QOWwRyHgJNb5sZe7--