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 58605C73C68 for ; Wed, 10 Jul 2019 05:10:29 +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 29DA720838 for ; Wed, 10 Jul 2019 05:10:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 29DA720838 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]:57972 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hl4s0-0003dB-SB for qemu-devel@archiver.kernel.org; Wed, 10 Jul 2019 01:10:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44275) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hl4qk-0002QM-C3 for qemu-devel@nongnu.org; Wed, 10 Jul 2019 01:09:03 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hl4qi-0000IQ-CL for qemu-devel@nongnu.org; Wed, 10 Jul 2019 01:09:02 -0400 Received: from mga02.intel.com ([134.134.136.20]:6071) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hl4qg-0000AM-T3 for qemu-devel@nongnu.org; Wed, 10 Jul 2019 01:09:00 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Jul 2019 22:08:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,473,1557212400"; d="scan'208";a="364360409" Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by fmsmga005.fm.intel.com with ESMTP; 09 Jul 2019 22:08:55 -0700 From: Wei Yang To: qemu-devel@nongnu.org Date: Wed, 10 Jul 2019 13:08:13 +0800 Message-Id: <20190710050814.31344-2-richardw.yang@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190710050814.31344-1-richardw.yang@linux.intel.com> References: <20190710050814.31344-1-richardw.yang@linux.intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.20 Subject: [Qemu-devel] [PATCH 1/2] migration/postcopy: reduce one operation to calculate fixup_start_addr 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: Wei Yang , dgilbert@redhat.com, quintela@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Use the same way for run_end to calculate run_start, which saves one operation. Signed-off-by: Wei Yang --- migration/ram.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 410e0f89fe..c4dc36e525 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2884,10 +2884,12 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, bool unsent_pass, host_offset = run_start % host_ratio; if (host_offset) { do_fixup = true; - run_start -= host_offset; - fixup_start_addr = run_start; - /* For the next pass */ - run_start = run_start + host_ratio; + fixup_start_addr = run_start - host_offset; + /* + * This host page has gone, the next loop iteration starts + * from after the fixup + */ + run_start = fixup_start_addr + host_ratio; } else { /* Find the end of this run */ unsigned long run_end; -- 2.17.1