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Thu, 16 Jul 2020 23:17:07 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 06GNDiTN111977; Thu, 16 Jul 2020 23:15:06 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3020.oracle.com with ESMTP id 327qbctyd5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 16 Jul 2020 23:15:06 +0000 Received: from abhmp0013.oracle.com (abhmp0013.oracle.com [141.146.116.19]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 06GNF3TF013005; Thu, 16 Jul 2020 23:15:04 GMT Received: from [192.168.2.112] (/50.38.35.18) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 16 Jul 2020 16:15:03 -0700 Subject: Re: [PATCH v4 03/15] mm,madvise: call soft_offline_page() without MF_COUNT_INCREASED To: Oscar Salvador , akpm@linux-foundation.org Cc: mhocko@suse.com, linux-mm@kvack.org, david@redhat.com, aneesh.kumar@linux.vnet.ibm.com, naoya.horiguchi@nec.com, linux-kernel@vger.kernel.org, Naoya Horiguchi , Oscar Salvador References: <20200716123810.25292-1-osalvador@suse.de> <20200716123810.25292-4-osalvador@suse.de> From: Mike Kravetz Message-ID: <0467947a-4306-bc36-2c5e-04e578990d36@oracle.com> Date: Thu, 16 Jul 2020 16:15:01 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <20200716123810.25292-4-osalvador@suse.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9684 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 malwarescore=0 mlxscore=0 spamscore=0 phishscore=0 suspectscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007160149 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9684 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 priorityscore=1501 bulkscore=0 adultscore=0 lowpriorityscore=0 phishscore=0 spamscore=0 impostorscore=0 malwarescore=0 mlxlogscore=999 clxscore=1011 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007160149 X-Rspamd-Queue-Id: E3B633760C X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 7/16/20 5:37 AM, Oscar Salvador wrote: > From: Naoya Horiguchi > > The call to get_user_pages_fast is only to get the pointer to a struct > page of a given address, pinning it is memory-poisoning handler's job, > so drop the refcount grabbed by get_user_pages_fast > > Signed-off-by: Naoya Horiguchi > Signed-off-by: Oscar Salvador Reviewed-by: Mike Kravetz -- Mike Kravetz