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Wed, 8 Jul 2020 20:30:13 +0000 (GMT) Received: from arbab-vm.localdomain (unknown [9.160.108.126]) by b03ledav003.gho.boulder.ibm.com (Postfix) with SMTP; Wed, 8 Jul 2020 20:30:13 +0000 (GMT) Received: from arbab-vm (localhost [IPv6:::1]) by arbab-vm.localdomain (Postfix) with ESMTP id B3AF01001AC; Wed, 8 Jul 2020 15:30:10 -0500 (CDT) Date: Wed, 8 Jul 2020 15:30:10 -0500 From: Reza Arbab To: "Aneesh Kumar K.V" Subject: Re: [PATCH v2 2/4] powerpc/mm/radix: Free PUD table when freeing pagetable Message-ID: <20200708203010.qmpdgtxpfgiffzpi@arbab-vm> Organization: IBM Linux Technology Center References: <20200625064547.228448-1-aneesh.kumar@linux.ibm.com> <20200625064547.228448-3-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20200625064547.228448-3-aneesh.kumar@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-08_17:2020-07-08, 2020-07-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 adultscore=0 priorityscore=1501 mlxscore=0 lowpriorityscore=0 mlxlogscore=579 bulkscore=0 suspectscore=0 malwarescore=0 phishscore=0 impostorscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007080121 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, Bharata B Rao Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Thu, Jun 25, 2020 at 12:15:45PM +0530, Aneesh Kumar K.V wrote: >remove_pagetable() isn't freeing PUD table. This causes memory >leak during memory unplug. Fix this. This has come up before: https://lore.kernel.org/linuxppc-dev/20190731061920.GA18807@in.ibm.com/ tl;dr, x86 intentionally does not free, and it wasn't quite clear if their motivation also applies to us. Probably not, but I thought it was worth mentioning again. -- Reza Arbab