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 lists1p.gnu.org (lists1p.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 B626ACC6B1A for ; Wed, 14 Oct 2026 07:43:54 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1xGtdp-0003OJ-AK; Wed, 14 Oct 2026 03:43:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1xGtdm-0003L7-C4 for qemu-devel@nongnu.org; Wed, 14 Oct 2026 03:43:10 -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 1xGtdl-00069y-0S for qemu-devel@nongnu.org; Wed, 14 Oct 2026 03:43:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1791963788; 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=JiYAs25/KakYdvUyEFfm/wOBdHijHXvqPoHEpa3eiMc=; b=hESAHY9slIX83T5EK/2ViNLymmDXOWNJ9PB6f3aZR85gcyilicMdkhy+uTpva+NZNO/ZnK uouZcwjQ8dPLXrCfYshgjaEcYS/ey/5S7OLHWuezUzDeo48lcemEiWJgjiiO71Z6DwQWWY FcyeKMrvYT3WTKQ2QKuW6Zrafejlzh8= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-103-qdi1q0W7N9ygTSaO51dOuA-1; Wed, 14 Oct 2026 07:43:00 +0000 X-MC-Unique: qdi1q0W7N9ygTSaO51dOuA-1 X-Mimecast-MFC-AGG-ID: qdi1q0W7N9ygTSaO51dOuA_1791963779 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A4F0918001EF; Wed, 14 Oct 2026 07:42:58 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.44.22.2]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 99E861800347; Wed, 14 Oct 2026 07:42:57 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 4081321E6A04; Wed, 14 Oct 2026 09:42:55 +0200 (CEST) From: Markus Armbruster To: Dongli Zhang Cc: qemu-devel@nongnu.org, david@kernel.org, imammedo@redhat.com, maciej.szmigiero@oracle.com, peterx@redhat.com, farosas@suse.de, mark.kanda@oracle.com, bchaney@akamai.com, pierrick.bouvier@oss.qualcomm.com, alex@shazbot.org, clg@redhat.com, yi.l.liu@intel.com, eric.auger@redhat.com, zhenzhong.duan@intel.com, mst@redhat.com, cohuck@redhat.com, pbonzini@redhat.com, eblake@redhat.com Subject: Re: [PATCH 01/21] qapi/migration: add cpr-luo migration mode In-Reply-To: <20261012235727.398133-2-dongli.zhang@oracle.com> (Dongli Zhang's message of "Mon, 12 Oct 2026 23:55:57 +0000") References: <20261012235727.398133-1-dongli.zhang@oracle.com> <20261012235727.398133-2-dongli.zhang@oracle.com> Date: Wed, 14 Oct 2026 09:42:55 +0200 Message-ID: <878q40eni8.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 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: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.24, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-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: qemu development 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 Dongli Zhang writes: > Add the cpr-luo migration mode for CPR through the Linux Live Update > Orchestrator (LUO). Subsequent changes preserve CPR state and RAMBlock > backing file descriptors in an LUO session across a host kernel update. > > Signed-off-by: Dongli Zhang > --- > qapi/migration.json | 11 ++++++++++- > 1 file changed, 10 insertions(+), 1 deletion(-) > > diff --git a/qapi/migration.json b/qapi/migration.json > index 889a9b89c2..ab117c3897 100644 > --- a/qapi/migration.json > +++ b/qapi/migration.json > @@ -712,9 +712,18 @@ > # with the '-machine aux-ram-share=on' option. > # > # (since 10.2) > +# > +# @cpr-luo: A CPR mode that preserves guest RAM backing file > +# descriptors and CPR state through the Linux Live Update > +# Orchestrator (LUO) across a host kernel update. > +# > +# This mode requires Linux with LUO support. Pardon my ignorant question: host or guest kernel? > +# > +# (since 11.2) > ## > { 'enum': 'MigMode', > - 'data': [ 'normal', 'cpr-reboot', 'cpr-transfer', 'cpr-exec' ] } > + 'data': [ 'normal', 'cpr-reboot', 'cpr-transfer', 'cpr-exec', > + 'cpr-luo' ] } > > ## > # @ZeroPageDetection: