From nobody Mon Feb 9 22:37:53 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=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1675985735; cv=none; d=zohomail.com; s=zohoarc; b=XQ6ISY3BvdLHzEJWS+ZifFwzYJaQsFw0I5E0Pl9UtEmGHygW23Ct3WtiFn4/POkOQAEw3hx44qt9D9QjiU59s1CQpFzH3FIYTNwJErdgJQaL2r4MMR8OCs/hbdXG5JvAMsrH4r/oiTUyWh1roLGzqLPZDEkEcQfIOodoGmOWf/w= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1675985735; h=Content-Type: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=BxVM9FXar3irkIoVtJS/WSlKY7fbiT+xR3i8SoS4su8=; b=GVXQ2LI1eMbXzqKThqsZeeteYtgXF7j3KEfHBQ9Jirfnjk1iSDGAStnfzhSkDwmKrqpVDFQbkaI84AtUE6DdAsti5/eqG9M9LWE9ZRY6hwrGFyyf/9CwfV+CGzE5giKX333Mm+glbk9YDX4MJrsc948f5OZRmrCFvtl/vfDrRYE= 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=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 16759857355041005.7364991546102; Thu, 9 Feb 2023 15:35:35 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pQGRQ-000094-PS; Thu, 09 Feb 2023 18:35:00 -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 1pQGRL-0008Ag-Hh for qemu-devel@nongnu.org; Thu, 09 Feb 2023 18:34:55 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pQGRJ-0006i4-Qb for qemu-devel@nongnu.org; Thu, 09 Feb 2023 18:34:55 -0500 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-132-CQ9wYbGTP9a54AnvNrec-g-1; Thu, 09 Feb 2023 18:34:50 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B6CDB1C05AAD; Thu, 9 Feb 2023 23:34:49 +0000 (UTC) Received: from secure.mitica (unknown [10.39.192.29]) by smtp.corp.redhat.com (Postfix) with ESMTP id A41CF175AD; Thu, 9 Feb 2023 23:34:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1675985693; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BxVM9FXar3irkIoVtJS/WSlKY7fbiT+xR3i8SoS4su8=; b=XOYUeXsrOhixDIQJpG3mT2MlEnyTiHhNnJoY33tC7TUBBXO+yDoxicdf66J9E9jUWo5sUg qV51bCUs5IaCqGooDyVJbqst45JW8zrI3wc5uSxRW0x3R5JoBUEO9qN0X04hEMnhfX7CTJ gnkoH6iGamiRGo0bL6kDl1TAnOv3HdE= X-MC-Unique: CQ9wYbGTP9a54AnvNrec-g-1 From: Juan Quintela To: qemu-devel@nongnu.org Cc: kvm@vger.kernel.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Juan Quintela , "Dr. David Alan Gilbert" , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Paolo Bonzini , Cornelia Huck , "Michael S. Tsirkin" , Thomas Huth , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PULL 09/17] migration: Calculate ram size once Date: Fri, 10 Feb 2023 00:34:18 +0100 Message-Id: <20230209233426.37811-10-quintela@redhat.com> In-Reply-To: <20230209233426.37811-1-quintela@redhat.com> References: <20230209233426.37811-1-quintela@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 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=170.10.133.124; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com 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, 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_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-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: 2.1.29 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 @redhat.com) X-ZM-MESSAGEID: 1675985736074100001 We are recalculating ram size continously, when we know that it don't change during migration. Create a field in RAMState to track it. Signed-off-by: Juan Quintela Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- migration/ram.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 4dd9cf87ea..d108bf6951 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -330,6 +330,8 @@ struct RAMState { PageSearchStatus pss[RAM_CHANNEL_MAX]; /* UFFD file descriptor, used in 'write-tracking' migration */ int uffdio_fd; + /* total ram size in bytes */ + uint64_t ram_bytes_total; /* Last block that we have visited searching for dirty pages */ RAMBlock *last_seen_block; /* Last dirty target page we have sent */ @@ -2546,7 +2548,7 @@ static int ram_find_and_save_block(RAMState *rs) int pages =3D 0; =20 /* No dirty page as there is zero RAM */ - if (!ram_bytes_total()) { + if (!rs->ram_bytes_total) { return pages; } =20 @@ -3009,13 +3011,14 @@ static int ram_state_init(RAMState **rsp) qemu_mutex_init(&(*rsp)->bitmap_mutex); qemu_mutex_init(&(*rsp)->src_page_req_mutex); QSIMPLEQ_INIT(&(*rsp)->src_page_requests); + (*rsp)->ram_bytes_total =3D ram_bytes_total(); =20 /* * Count the total number of pages used by ram blocks not including any * gaps due to alignment or unplugs. * This must match with the initial values of dirty bitmap. */ - (*rsp)->migration_dirty_pages =3D ram_bytes_total() >> TARGET_PAGE_BIT= S; + (*rsp)->migration_dirty_pages =3D (*rsp)->ram_bytes_total >> TARGET_PA= GE_BITS; ram_state_reset(*rsp); =20 return 0; --=20 2.39.1