From nobody Thu Apr 3 12:22:18 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail header.i=@fujitsu.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=nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1741156110; cv=none; d=zohomail.com; s=zohoarc; b=R6pP4dGZ7Q0iOp1fLCxARjzPw49T77okHk+48hPV4WzAjrK7EYnXVNsMRMYmyfaptufMUfNLLojvLhNnlkcu4F3Wxohe9QKPvyPBmsKBuR0Ay369aaGvTAwIT3x5snEn4Qbpd3PGu2jZFf4Nv5tPmSS0GcuuQZhV9k0xfn43imk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1741156110; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:Reply-To:References:Sender:Subject:Subject:To:To:Message-Id; bh=d/g5oAYvOveN7vR8yTHxTXUrnrd+S65hWl47rDFmE2g=; b=M68swcb6plgjgJ/ut8x/1BswpnOp6eN7kL0IjFahTXHnKyqCbIRPWdnS5WG9nHIikLaIpHZnTfxaWjlRoA8o6Rt3U5hh+Z6om2ZDbL4dgDBZmYEYYucOAzcD9dzYU6g+Pn9VY2NxyAsh2R5/aThUS/K8RUYChV8VvyVdy8xnbos= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail header.i=@fujitsu.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 1741156110865887.1552856830738; Tue, 4 Mar 2025 22:28:30 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tpiDs-0002H3-Uo; Wed, 05 Mar 2025 01:27:16 -0500 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 1tpiDe-0002EL-El for qemu-devel@nongnu.org; Wed, 05 Mar 2025 01:27:04 -0500 Received: from esa5.hc1455-7.c3s2.iphmx.com ([68.232.139.130]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tpiDb-0007eh-N5 for qemu-devel@nongnu.org; Wed, 05 Mar 2025 01:27:02 -0500 Received: from unknown (HELO yto-r4.gw.nic.fujitsu.com) ([218.44.52.220]) by esa5.hc1455-7.c3s2.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2025 15:26:53 +0900 Received: from yto-m2.gw.nic.fujitsu.com (yto-nat-yto-m2.gw.nic.fujitsu.com [192.168.83.65]) by yto-r4.gw.nic.fujitsu.com (Postfix) with ESMTP id 9CE0AE076B for ; Wed, 5 Mar 2025 15:26:51 +0900 (JST) Received: from edo.cn.fujitsu.com (edo.cn.fujitsu.com [10.167.33.5]) by yto-m2.gw.nic.fujitsu.com (Postfix) with ESMTP id 4F286D5037 for ; Wed, 5 Mar 2025 15:26:51 +0900 (JST) Received: from iaas-rdma.. (unknown [10.167.135.44]) by edo.cn.fujitsu.com (Postfix) with ESMTP id 9BDD11A00AE; Wed, 5 Mar 2025 14:26:50 +0800 (CST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=fujitsu.com; i=@fujitsu.com; q=dns/txt; s=fj2; t=1741156019; x=1772692019; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=+CR7mMv1ubPow4V3VojBzeRtfH/4mt0zSZmZJSzhgAQ=; b=V049X8BJBb6iHNJvSYQKzmbOTq8gHg7l2BbH1AEnW4qVbWAuxkimUW6D 2n+PKp9gGsekCDFexuXNXrEyBnjxFnWE87d1U9+sIA35rKC48/WX2fCax z5yaS+otqwQI+CVOA9IXsQUUU92rcx2vKhTkaOi+HNZ+Uzv/EGbY2DQWq 8lmqX1/OuTQ6BJP2T+nPk6zKmoljc6LZzOtkSelNGdQr9pSEREZC5FT4+ OVrQ9/y33Jo9P0imQYF4lQrKmz9QOI6FApQN7h8lThVn5NZfMDXKgBiUR tp40Q9aXi1DlLerB6xjajODiWPwOfk8CP/kjEfcGCguyn6u6vhc2v7j6I Q==; X-CSE-ConnectionGUID: pxRF47CDRP2/aB3/eLHP6g== X-CSE-MsgGUID: M929AnRWSoGi3ingVL2n5Q== X-IronPort-AV: E=McAfee;i="6700,10204,11363"; a="191183347" X-IronPort-AV: E=Sophos;i="6.14,222,1736780400"; d="scan'208";a="191183347" To: qemu-devel@nongnu.org Cc: Peter Xu , Fabiano Rosas , Laurent Vivier , Paolo Bonzini , Li Zhijian Subject: [PATCH v5 1/6] migration: Prioritize RDMA in ram_save_target_page() Date: Wed, 5 Mar 2025 14:28:20 +0800 Message-ID: <20250305062825.772629-2-lizhijian@fujitsu.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20250305062825.772629-1-lizhijian@fujitsu.com> References: <20250305062825.772629-1-lizhijian@fujitsu.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=68.232.139.130; envelope-from=lizhijian@fujitsu.com; helo=esa5.hc1455-7.c3s2.iphmx.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Li Zhijian From: Li Zhijian via Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1741156112668019100 Content-Type: text/plain; charset="utf-8" Address an error in RDMA-based migration by ensuring RDMA is prioritized when saving pages in `ram_save_target_page()`. Previously, the RDMA protocol's page-saving step was placed after other protocols due to a refactoring in commit bc38dc2f5f3. This led to migration failures characterized by unknown control messages and state loading errors destination: (qemu) qemu-system-x86_64: Unknown control message QEMU FILE qemu-system-x86_64: error while loading state section id 1(ram) qemu-system-x86_64: load of migration failed: Operation not permitted source: (qemu) qemu-system-x86_64: RDMA is in an error state waiting migration to a= bort! qemu-system-x86_64: failed to save SaveStateEntry with id(name): 1(ram): -1 qemu-system-x86_64: rdma migration: recv polling control error! qemu-system-x86_64: warning: Early error. Sending error. qemu-system-x86_64: warning: rdma migration: send polling control error RDMA migration implemented its own protocol/method to send pages to destination side, hand over to RDMA first to prevent pages being saved by other protocol. Fixes: bc38dc2f5f3 ("migration: refactor ram_save_target_page functions") Reviewed-by: Peter Xu Signed-off-by: Li Zhijian --- V3: collect Reviewed tags --- migration/ram.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 589b6505eb2..424df6d9f13 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -1964,6 +1964,11 @@ static int ram_save_target_page(RAMState *rs, PageSe= archStatus *pss) ram_addr_t offset =3D ((ram_addr_t)pss->page) << TARGET_PAGE_BITS; int res; =20 + /* Hand over to RDMA first */ + if (control_save_page(pss, offset, &res)) { + return res; + } + if (!migrate_multifd() || migrate_zero_page_detection() =3D=3D ZERO_PAGE_DETECTION_LEGACY= ) { if (save_zero_page(rs, pss, offset)) { @@ -1976,10 +1981,6 @@ static int ram_save_target_page(RAMState *rs, PageSe= archStatus *pss) return ram_save_multifd_page(block, offset); } =20 - if (control_save_page(pss, offset, &res)) { - return res; - } - return ram_save_page(rs, pss); } =20 --=20 2.44.0