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=-5.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_1 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 3D6C7C43603 for ; Thu, 12 Dec 2019 18:30:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1616A21556 for ; Thu, 12 Dec 2019 18:30:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="htkMrFA6" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730380AbfLLSaU (ORCPT ); Thu, 12 Dec 2019 13:30:20 -0500 Received: from userp2130.oracle.com ([156.151.31.86]:42130 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730034AbfLLSaU (ORCPT ); Thu, 12 Dec 2019 13:30:20 -0500 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.27/8.16.0.27) with SMTP id xBCILdfF065095; Thu, 12 Dec 2019 18:30:07 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2019-08-05; bh=jdYlNasovEzctO/D5dYLkQh+fKQP1bnYDPj0kFsSE5Y=; b=htkMrFA6M2V9m5APanf/ZIvNE8zC7AMFkbbGOotIifbreTkA3TBSx/0WrO8SuSHABDUH jE377f7BFwyhyqaUCQyix3dvagOgRJp2WAQKIlADlNo7npkYronyB4+R26QtxXFh19S6 ewEJzhhMtckB7fhPUmf1PcL46S3uE57/2rGOolAhouMHtQp+KveiV9JmkbQWYiQN2eqt +QqkDXRLyn3d4a4oBQ6RLjKfoulqddfv7rjeRACb96hONymMDhqWXdVlnt3wx/u+Jhx3 Z5lwpwM5vIaLhpRdjSAK5sNBnnSa07A7rUbJ3v4p3J8EDq9aTLLVl84K2YlzeeOeOhCR 5A== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by userp2130.oracle.com with ESMTP id 2wrw4nhnr4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 12 Dec 2019 18:30:07 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id xBCILFq9146342; Thu, 12 Dec 2019 18:30:06 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3020.oracle.com with ESMTP id 2wums9tawx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 12 Dec 2019 18:30:06 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id xBCIU5Rx017566; Thu, 12 Dec 2019 18:30:05 GMT Received: from bostrovs-us.us.oracle.com (/10.152.32.65) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 12 Dec 2019 10:30:05 -0800 Subject: Re: [PATCH] xen/balloon: fix ballooned page accounting without hotplug enabled To: Juergen Gross , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Cc: Stefano Stabellini References: <20191212141750.1896-1-jgross@suse.com> From: Boris Ostrovsky Message-ID: <65142ae8-66ff-56f5-b2ca-9791c6c47289@oracle.com> Date: Thu, 12 Dec 2019 13:30:04 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.0 MIME-Version: 1.0 In-Reply-To: <20191212141750.1896-1-jgross@suse.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9469 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-1912120141 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9469 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-1912120141 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/12/19 9:17 AM, Juergen Gross wrote: > When CONFIG_XEN_BALLOON_MEMORY_HOTPLUG is not defined > reserve_additional_memory() will set balloon_stats.target_pages to a > wrong value in case there are still some ballooned pages allocated via > alloc_xenballooned_pages(). > > This will result in balloon_process() no longer be triggered when > ballooned pages are freed in batches. > > Reported-by: Nicholas Tsirakis > Signed-off-by: Juergen Gross Reviewed-by: Boris Ostrovsky