From nobody Mon Feb 9 01:20:07 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linux.intel.com ARC-Seal: i=1; a=rsa-sha256; t=1573130517; cv=none; d=zoho.com; s=zohoarc; b=d9tWLlR8j/oqYZuLFxLJkxfHs5PcqFXVgGhbwIMtybPsqmFsiJy+DCYwXYxp7OC0q6beJ7/xBNJe5APCk+GhIrjZnqdFfTxJ+gysiG8mBoJTHGG/a2J99M86VA4mkRuOUea5lmv8g/Y0xOJqdO8KndVkaz3nBALmp+7hfysxu/o= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1573130517; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=ZWJNO4V3osWjcagEUNSSUIwI4ZgB4mqBgMDjQUPW9OA=; b=DleSDAcnU2dTZPYH7xXFU5iul0zfyynUdnigDoeB0vqpZpxVl+ZeqXgcYfxFKeOwptHlDLWzig7s4TpucgMDyz2zCSBgDYb5yO+3HWMrQfFP9X5MbG/u4pN/CC7hbUoHD5Qxu8YEO74dGXZLFaX67wG00H8txT8e7fcHNwDCWrY= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none 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 157313051741345.2497090826721; Thu, 7 Nov 2019 04:41:57 -0800 (PST) Received: from localhost ([::1]:41640 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iSh6n-0005uq-3D for importer@patchew.org; Thu, 07 Nov 2019 07:41:53 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:58932) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iSh4f-000409-Pn for qemu-devel@nongnu.org; Thu, 07 Nov 2019 07:39:42 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iSh4e-0002rX-M0 for qemu-devel@nongnu.org; Thu, 07 Nov 2019 07:39:41 -0500 Received: from mga06.intel.com ([134.134.136.31]:63430) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iSh4e-0002nd-Cz for qemu-devel@nongnu.org; Thu, 07 Nov 2019 07:39:40 -0500 Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 07 Nov 2019 04:39:39 -0800 Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by orsmga005.jf.intel.com with ESMTP; 07 Nov 2019 04:39:38 -0800 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,278,1569308400"; d="scan'208";a="377408594" From: Wei Yang To: quintela@redhat.com, dgilbert@redhat.com Subject: [Patch v2 3/6] migration/postcopy: count target page number to decide the place_needed Date: Thu, 7 Nov 2019 20:39:04 +0800 Message-Id: <20191107123907.29791-4-richardw.yang@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191107123907.29791-1-richardw.yang@linux.intel.com> References: <20191107123907.29791-1-richardw.yang@linux.intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.31 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: , Cc: qemu-devel@nongnu.org, Wei Yang Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" In postcopy, it requires to place whole host page instead of target page. Currently, it relies on the page offset to decide whether this is the last target page. We also can count the target page number during the iteration. When the number of target page equals (host page size / target page size), this means it is the last target page in the host page. This is a preparation for non-ordered target page transmission. Signed-off-by: Wei Yang Reviewed-by: Dr. David Alan Gilbert Reviewed-by: Juan Quintela --- migration/ram.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index f59e3fe197..5c05376d8d 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -4017,6 +4017,7 @@ static int ram_load_postcopy(QEMUFile *f) void *postcopy_host_page =3D mis->postcopy_tmp_page; void *last_host =3D NULL; bool all_zero =3D false; + int target_pages =3D 0; =20 while (!ret && !(flags & RAM_SAVE_FLAG_EOS)) { ram_addr_t addr; @@ -4051,6 +4052,7 @@ static int ram_load_postcopy(QEMUFile *f) ret =3D -EINVAL; break; } + target_pages++; matches_target_page_size =3D block->page_size =3D=3D TARGET_PA= GE_SIZE; /* * Postcopy requires that we place whole host pages atomically; @@ -4082,8 +4084,10 @@ static int ram_load_postcopy(QEMUFile *f) * If it's the last part of a host page then we place the host * page */ - place_needed =3D (((uintptr_t)host + TARGET_PAGE_SIZE) & - (block->page_size - 1)) =3D=3D 0; + if (target_pages =3D=3D (block->page_size / TARGET_PAGE_SIZE))= { + place_needed =3D true; + target_pages =3D 0; + } place_source =3D postcopy_host_page; } last_host =3D host; --=20 2.17.1