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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 868C4C3A589 for ; Thu, 15 Aug 2019 16:46:17 +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 1D65E20578 for ; Thu, 15 Aug 2019 16:46:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1D65E20578 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44392 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hyItD-0005TY-Mg for qemu-devel@archiver.kernel.org; Thu, 15 Aug 2019 12:46:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47204) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hyIir-0001WX-ED for qemu-devel@nongnu.org; Thu, 15 Aug 2019 12:35:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hyIin-0002FV-F4 for qemu-devel@nongnu.org; Thu, 15 Aug 2019 12:35:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58802) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hyIin-0002F5-AC for qemu-devel@nongnu.org; Thu, 15 Aug 2019 12:35:29 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9E186302C07A; Thu, 15 Aug 2019 16:35:28 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-117-19.ams2.redhat.com [10.36.117.19]) by smtp.corp.redhat.com (Postfix) with ESMTP id 889353737; Thu, 15 Aug 2019 16:35:24 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org Date: Thu, 15 Aug 2019 17:34:38 +0100 Message-Id: <20190815163504.18937-8-dgilbert@redhat.com> In-Reply-To: <20190815163504.18937-1-dgilbert@redhat.com> References: <20190815163504.18937-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.46]); Thu, 15 Aug 2019 16:35:28 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 07/33] 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: quintela@redhat.com, yury-kotov@yandex-team.ru, richardw.yang@linux.intel.com, marcandre.lureau@redhat.com, ivanren@tencent.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Wei Yang Use the same way for run_end to calculate run_start, which saves one operation. Signed-off-by: Wei Yang Message-Id: <20190710050814.31344-2-richardw.yang@linux.intel.com> Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Dr. David Alan Gilbert --- migration/ram.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 4bb5e24459..da399f2c8a 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2973,10 +2973,12 @@ static void postcopy_chunk_hostpages_pass(Migrati= onState *ms, bool unsent_pass, host_offset =3D run_start % host_ratio; if (host_offset) { do_fixup =3D true; - run_start -=3D host_offset; - fixup_start_addr =3D run_start; - /* For the next pass */ - run_start =3D run_start + host_ratio; + fixup_start_addr =3D run_start - host_offset; + /* + * This host page has gone, the next loop iteration starts + * from after the fixup + */ + run_start =3D fixup_start_addr + host_ratio; } else { /* Find the end of this run */ unsigned long run_end; --=20 2.21.0