From nobody Tue Feb 10 04:13:22 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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=quarantine dis=none) header.from=virtuozzo.com ARC-Seal: i=1; a=rsa-sha256; t=1616165787; cv=none; d=zohomail.com; s=zohoarc; b=IhhGFnh+SD4qoV+FxRikSlbYAvxwlKnu4UxXgS0H3wHMyVNahTEgsDZ+b34LtakkBVgUc8KPUgFVc9ccfXZhpWQ+PB2FHT/aQGFRtXXByI/p2tdREfINNsQQ23UK04ijxQzyYFoqhhqXv+Q3hKpp2o9SQvuKQOrMN/GToooayn8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1616165787; 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=jH0WZ/RmDE/Z2aVjOBynPZMT/xmSLmwmRqUG0uuuXok=; b=Pwyi9g72kYWHZ5Gx7QpMlUW5nD2IP/8w5OQVRc8hcgxa440D8YRTNL/H8iZ/guJF+8s7NQ8sF+XNQ+OpPxZ1RsvO3JMLwGF+L31pKUwrsQ1t6SkDy+Ut1+RBdiEgKWPA8pilYaLiOkzgA78JAPyNN32s8WozDZuMzAYMcLRgVtQ= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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=quarantine dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1616165783904707.7224105373323; Fri, 19 Mar 2021 07:56:23 -0700 (PDT) Received: from localhost ([::1]:53218 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lNGXz-0007aW-Pq for importer@patchew.org; Fri, 19 Mar 2021 10:56:19 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56518) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lNGUn-00042y-Kq for qemu-devel@nongnu.org; Fri, 19 Mar 2021 10:53:02 -0400 Received: from relay.sw.ru ([185.231.240.75]:58480) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lNGUh-0003xQ-0y for qemu-devel@nongnu.org; Fri, 19 Mar 2021 10:53:01 -0400 Received: from [192.168.15.248] (helo=andrey-MS-7B54.sw.ru) by relay.sw.ru with esmtp (Exim 4.94) (envelope-from ) id 1lNGUX-00010K-SG; Fri, 19 Mar 2021 17:52:45 +0300 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=virtuozzo.com; s=relay; h=MIME-Version:Message-Id:Date:Subject:From: Content-Type; bh=jH0WZ/RmDE/Z2aVjOBynPZMT/xmSLmwmRqUG0uuuXok=; b=B/6H6uU022Oo sbZPEslU4m+iauFlowAQ7EdXwGT+Kf62QWmrwQx2UZw9hB7gRGX5rNNjmKt0/OTVLo2kSdmDO2443 7wY6ijJAGPVSSWz6ZkT3H93/C5f+3fH5VduJYXyWx0x2aVhgEfy/mpF2e0jGivdo2aVY8wJ+k03d2 F7BL0=; From: Andrey Gruzdev To: qemu-devel@nongnu.org Cc: Den Lunev , Eric Blake , Paolo Bonzini , Juan Quintela , "Dr . David Alan Gilbert" , Markus Armbruster , Peter Xu , David Hildenbrand , Andrey Gruzdev Subject: [PATCH v1 1/3] migration: Fix missing qemu_fflush() on buffer file in bg_migration_thread Date: Fri, 19 Mar 2021 17:52:47 +0300 Message-Id: <20210319145249.425189-2-andrey.gruzdev@virtuozzo.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210319145249.425189-1-andrey.gruzdev@virtuozzo.com> References: <20210319145249.425189-1-andrey.gruzdev@virtuozzo.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=185.231.240.75; envelope-from=andrey.gruzdev@virtuozzo.com; helo=relay.sw.ru 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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Type: text/plain; charset="utf-8" Added missing qemu_fflush() on buffer file holding precopy device state. Increased initial QIOChannelBuffer allocation to 512KB to avoid reallocs. Typical configurations often require >200KB for device state and VMDESC. Signed-off-by: Andrey Gruzdev --- migration/migration.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/migration/migration.c b/migration/migration.c index ca8b97baa5..32b48fe9f5 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -3812,7 +3812,7 @@ static void *bg_migration_thread(void *opaque) * with vCPUs running and, finally, write stashed non-RAM part of * the vmstate from the buffer to the migration stream. */ - s->bioc =3D qio_channel_buffer_new(128 * 1024); + s->bioc =3D qio_channel_buffer_new(512 * 1024); qio_channel_set_name(QIO_CHANNEL(s->bioc), "vmstate-buffer"); fb =3D qemu_fopen_channel_output(QIO_CHANNEL(s->bioc)); object_unref(OBJECT(s->bioc)); @@ -3866,6 +3866,8 @@ static void *bg_migration_thread(void *opaque) if (qemu_savevm_state_complete_precopy_non_iterable(fb, false, false))= { goto fail; } + qemu_fflush(fb); + /* Now initialize UFFD context and start tracking RAM writes */ if (ram_write_tracking_start()) { goto fail; --=20 2.25.1