From nobody Sun Feb 8 22:49:40 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=1561601522; cv=none; d=zoho.com; s=zohoarc; b=kGf1N4lwjO+JX5BWLXCqVVdQ9AQE/dvmd333ZAnax9eQjxv3arLBUP6aptNpPr72cRbwfAuFkZRVk9tBW2VgnK9X1ucdf5JMx0BiKFVdxENFkSXWhZ3nDXk9Hau/19VJPAcobRN52DyrXI/Wwq1JMJpoFYEU2llgRjnOsfWRXps= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1561601522; h=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:ARC-Authentication-Results; bh=NlZlcNC/BG4zFyb/y6fDBBTMp/1K/SSZOLlb5fcPsSI=; b=gJFEqOpx8jxK6ie382hmjxU37u2aBqfhDys0EgFbTLGCGYtGtwLVl4Qkvr9zQlNw1opW2WOx2YXHRzMVFxYD1jesOzY7SVXBZpoEUNr++Nl469gbmWUr4WSKnYT15dCMnC0MvZEOXEfcFV4NyLtkSaji0pnT3Wr1MRE/RzyNVMM= 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 1561601522512932.9614654289795; Wed, 26 Jun 2019 19:12:02 -0700 (PDT) Received: from localhost ([::1]:45796 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hgJtH-0005oj-Js for importer@patchew.org; Wed, 26 Jun 2019 22:11:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51515) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hgJqQ-0002Pz-MU for qemu-devel@nongnu.org; Wed, 26 Jun 2019 22:09:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hgJqO-0004Ec-Qm for qemu-devel@nongnu.org; Wed, 26 Jun 2019 22:09:02 -0400 Received: from mga11.intel.com ([192.55.52.93]:6489) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hgJqN-0004AJ-SJ for qemu-devel@nongnu.org; Wed, 26 Jun 2019 22:09:00 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Jun 2019 19:08:50 -0700 Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by fmsmga002.fm.intel.com with ESMTP; 26 Jun 2019 19:08:49 -0700 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,422,1557212400"; d="scan'208";a="188879914" From: Wei Yang To: qemu-devel@nongnu.org Date: Thu, 27 Jun 2019 10:08:20 +0800 Message-Id: <20190627020822.15485-2-richardw.yang@linux.intel.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190627020822.15485-1-richardw.yang@linux.intel.com> References: <20190627020822.15485-1-richardw.yang@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.93 Subject: [Qemu-devel] [PATCH 1/3] migration/postcopy: the valid condition is one less then end 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" If one equals end, it means we have gone through the whole bitmap. Use a more restrict check to skip a unnecessary condition. 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 908517fc2b..b78169e811 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2777,7 +2777,7 @@ static int postcopy_send_discard_bm_ram(MigrationStat= e *ms, for (current =3D 0; current < end; ) { unsigned long one =3D find_next_bit(unsentmap, end, current); =20 - if (one <=3D end) { + if (one < end) { unsigned long zero =3D find_next_zero_bit(unsentmap, end, one = + 1); unsigned long discard_length; =20 --=20 2.19.1