From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0C63C5DF61 for ; Thu, 7 Nov 2019 12:41:53 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B531B2187F for ; Thu, 7 Nov 2019 12:41:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B531B2187F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:41642 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iSh6m-0005zN-8a for qemu-devel@archiver.kernel.org; Thu, 07 Nov 2019 07:41:52 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:58935) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iSh4f-00040i-WE 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-0002rt-W6 for qemu-devel@nongnu.org; Thu, 07 Nov 2019 07:39:41 -0500 Received: from mga06.intel.com ([134.134.136.31]:63431) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iSh4e-0002qi-OF for qemu-devel@nongnu.org; Thu, 07 Nov 2019 07:39:40 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False 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 04:39:40 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,278,1569308400"; d="scan'208";a="377408597" Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by orsmga005.jf.intel.com with ESMTP; 07 Nov 2019 04:39:39 -0800 From: Wei Yang To: quintela@redhat.com, dgilbert@redhat.com Subject: [Patch v2 4/6] migration/postcopy: set all_zero to true on the first target page Date: Thu, 7 Nov 2019 20:39:05 +0800 Message-Id: <20191107123907.29791-5-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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" For the first target page, all_zero is set to true for this round check. After target_pages introduced, we could leverage this variable instead of checking the address offset. Signed-off-by: Wei Yang Reviewed-by: Dr. David Alan Gilbert --- migration/ram.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/migration/ram.c b/migration/ram.c index 5c05376d8d..b5759793a9 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -4067,7 +4067,7 @@ static int ram_load_postcopy(QEMUFile *f) page_buffer = postcopy_host_page + ((uintptr_t)host & (block->page_size - 1)); /* If all TP are zero then we can optimise the place */ - if (!((uintptr_t)host & (block->page_size - 1))) { + if (target_pages == 1) { all_zero = true; } else { /* not the 1st TP within the HP */ -- 2.17.1