From nobody Mon Feb 9 01:19:37 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=1561601444; cv=none; d=zoho.com; s=zohoarc; b=PjrwiBUGpMyUAWmTLs3R359C+8GPr84PrPR9NqH73AGUqPxAimVTrnvCtQzV22eDH61e20KCuHblLnEat1tWFvwAmBZbVmgA+/nlxFT83RChlCUKjZMZbsJsF5iwk2KiwlWRZypB9VI06VoHLeB4nVPBU0284xy2aLut1a9MNio= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1561601444; 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=CjciQGKiq/bu0x+fkWwIVEsRmfLWtFqWX8SkqLK4M3Y=; b=hquhBtLAxw32bKLC4U6LIGSExZ2Om6GO+K4jnRPanYfgm+CZ16a/gAPwL6dS9rK+y1o6yxnIMgFrdwbkHT0HaP8OhiNWI9O0+kzeOeTQFxJfP62do7XvC2YrY5VHpWrd/4e4ItUQ9MzUu2utN0karMwbVscyO532C90GpOxyO8w= 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 1561601444791491.91335368879515; Wed, 26 Jun 2019 19:10:44 -0700 (PDT) Received: from localhost ([::1]:45786 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hgJs0-00047x-Pn for importer@patchew.org; Wed, 26 Jun 2019 22:10:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51512) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hgJqQ-0002Pw-MT 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-0004EP-Qi for qemu-devel@nongnu.org; Wed, 26 Jun 2019 22:09:02 -0400 Received: from mga11.intel.com ([192.55.52.93]:6494) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hgJqN-0004CJ-U3 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 19:08:53 -0700 Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by fmsmga002.fm.intel.com with ESMTP; 26 Jun 2019 19:08:53 -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="188879923" From: Wei Yang To: qemu-devel@nongnu.org Date: Thu, 27 Jun 2019 10:08:22 +0800 Message-Id: <20190627020822.15485-4-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 3/3] migration/postcopy: discard_length must not be 0 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" Since we break the loop when there is no more page to discard, we are sure the following process would find some page to discard. It is not necessary to check it again. Signed-off-by: Wei Yang Reviewed-by: Dr. David Alan Gilbert --- migration/ram.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index b41b58ee54..246efe6939 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2789,9 +2789,7 @@ static int postcopy_send_discard_bm_ram(MigrationStat= e *ms, } else { discard_length =3D zero - one; } - if (discard_length) { - postcopy_discard_send_range(ms, pds, one, discard_length); - } + postcopy_discard_send_range(ms, pds, one, discard_length); current =3D one + discard_length; } =20 --=20 2.19.1