From nobody Mon Feb 9 00:30:57 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1686046788; cv=none; d=zohomail.com; s=zohoarc; b=G8FwqY3CB2o24wIGwkCDAHBJ6Ld9aAsqRcT1rOwWWyNzSGCHMQOiYSlSzprkrJ/feGxWp3dN6I9XkJPLhBavCHg0qiDBK9ve/NFcajzF9xeIluHZ9SdFdbQ5Y8anCIqKmTncVXCtJJZiajFLk5VxeJiQWSkUHSpWB6+Xa10/q70= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1686046788; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=htqefU01CUW29vhaLHdvRfz6VgtGymSs2/U9/KZpSF8=; b=enDwzARWtHEixwvp1f/A7FMCqA+5teC7b9iR4CLzE4y01xXXM2XtLSdZG9hB4p2qXyRYXEXWy7axMufMHyVUkJ30ePNm0YpBa7Gr0PYwVj+WNXXM+NCqJYBl/crvZReXznXsOiinGOIG4Jf+rh5j9F+c9SQU+2S/gKxcbx8T0t4= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 168604678791163.150823539463886; Tue, 6 Jun 2023 03:19:47 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1q6Tme-0000Br-9X; Tue, 06 Jun 2023 06:19:24 -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 1q6Tmc-00006C-7a for qemu-devel@nongnu.org; Tue, 06 Jun 2023 06:19:22 -0400 Received: from mga05.intel.com ([192.55.52.43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q6TmZ-0007Nm-Jb for qemu-devel@nongnu.org; Tue, 06 Jun 2023 06:19:21 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Jun 2023 03:19:16 -0700 Received: from tdx-lm.sh.intel.com ([10.239.53.27]) by orsmga002.jf.intel.com with ESMTP; 06 Jun 2023 03:19:14 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686046759; x=1717582759; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gfQ2g23Frf4Yd2X75DnzGcuHLOvhA17x9xeJUzT/+Xo=; b=NUEax+O+zOYozR33kKRjlnTaNw+YxAFekF05yb2n3eegonsSCS3LPPMw /IBcdYQZiVOi3Tb2U4T4UeTAH4UyRdryaRGbfrof0DksanmErH2mAlTKY DStOv9rXBarP73moYKvAULYfANP8ZvYx7PZKAvgk4xo/dxeyYXgrjPmO5 LtknnHwHSF45oBN9qtFHMYfKXkXYS8ovSBZKjrcX2v6senekYpTcltt50 xErDyjOYu5nUbBNDcdGlCTdlX74fk3+FGlGKEN+rSZ3suBXNNE168J0SX RP2FmdketVXxrmonyT1UdfuBMxlWZk8b7hVHqcbfYooXL5aP0WN16sA6j g==; X-IronPort-AV: E=McAfee;i="6600,9927,10732"; a="443004175" X-IronPort-AV: E=Sophos;i="6.00,221,1681196400"; d="scan'208";a="443004175" X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10732"; a="709032924" X-IronPort-AV: E=Sophos;i="6.00,221,1681196400"; d="scan'208";a="709032924" From: Wei Wang To: quintela@redhat.com, peterx@redhat.com, lei4.wang@intel.com Cc: qemu-devel@nongnu.org, Wei Wang Subject: [PATCH v2 1/2] migration: enfocre multifd and postcopy preempt to be set before incoming Date: Tue, 6 Jun 2023 18:19:09 +0800 Message-Id: <20230606101910.20456-2-wei.w.wang@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20230606101910.20456-1-wei.w.wang@intel.com> References: <20230606101910.20456-1-wei.w.wang@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=192.55.52.43; envelope-from=wei.w.wang@intel.com; helo=mga05.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1686046789906100003 Content-Type: text/plain; charset="utf-8" qemu_start_incoming_migration needs to check the number of multifd channels or postcopy ram channels to configure the backlog parameter (i.e. the maximum length to which the queue of pending connections for sockfd may grow) of listen(). So enforce the usage of postcopy-preempt and multifd as below: - need to use "-incoming defer" on the destination; and - set_capability and set_parameter need to be done before migrate_incoming Otherwise, disable the use of the features and report error messages to remind users to adjust the commands. Signed-off-by: Wei Wang Reviewed-by: Peter Xu Reviewed-by: Juan Quintela --- migration/options.c | 36 +++++++++++++++++++++++++++++++----- 1 file changed, 31 insertions(+), 5 deletions(-) diff --git a/migration/options.c b/migration/options.c index b62ab30cd5..01403e5eaa 100644 --- a/migration/options.c +++ b/migration/options.c @@ -415,6 +415,11 @@ INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snap= shot, MIGRATION_CAPABILITY_VALIDATE_UUID, MIGRATION_CAPABILITY_ZERO_COPY_SEND); =20 +static bool migrate_incoming_started(void) +{ + return !!migration_incoming_get_current()->transport_data; +} + /** * @migration_caps_check - check capability compatibility * @@ -538,6 +543,12 @@ bool migrate_caps_check(bool *old_caps, bool *new_caps= , Error **errp) error_setg(errp, "Postcopy preempt not compatible with compres= s"); return false; } + + if (migrate_incoming_started()) { + error_setg(errp, + "Postcopy preempt must be set before incoming start= s"); + return false; + } } =20 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { @@ -545,6 +556,10 @@ bool migrate_caps_check(bool *old_caps, bool *new_caps= , Error **errp) error_setg(errp, "Multifd is not compatible with compress"); return false; } + if (migrate_incoming_started()) { + error_setg(errp, "Multifd must be set before incoming starts"); + return false; + } } =20 return true; @@ -998,11 +1013,22 @@ bool migrate_params_check(MigrationParameters *param= s, Error **errp) =20 /* x_checkpoint_delay is now always positive */ =20 - if (params->has_multifd_channels && (params->multifd_channels < 1)) { - error_setg(errp, QERR_INVALID_PARAMETER_VALUE, - "multifd_channels", - "a value between 1 and 255"); - return false; + if (params->has_multifd_channels) { + if (params->multifd_channels < 1) { + error_setg(errp, QERR_INVALID_PARAMETER_VALUE, + "multifd_channels", + "a value between 1 and 255"); + return false; + } + if (migrate_incoming_started()) { + MigrationState *ms =3D migrate_get_current(); + + ms->capabilities[MIGRATION_CAPABILITY_MULTIFD] =3D false; + error_setg(errp, QERR_INVALID_PARAMETER_VALUE, + "multifd_channels", + "must be set before incoming starts"); + return false; + } } =20 if (params->has_multifd_zlib_level && --=20 2.27.0