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=-4.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no 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 DA8BDC07E96 for ; Thu, 8 Jul 2021 05:31:33 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5435061CDF for ; Thu, 8 Jul 2021 05:31:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5435061CDF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 3546A6B0011; Thu, 8 Jul 2021 01:31:33 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 32B2D6B005D; Thu, 8 Jul 2021 01:31:33 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 17E0B6B006C; Thu, 8 Jul 2021 01:31:33 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0131.hostedemail.com [216.40.44.131]) by kanga.kvack.org (Postfix) with ESMTP id E51056B0011 for ; Thu, 8 Jul 2021 01:31:32 -0400 (EDT) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 2F22B250DE for ; Thu, 8 Jul 2021 05:31:32 +0000 (UTC) X-FDA: 78338298024.26.14B910B Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by imf16.hostedemail.com (Postfix) with ESMTP id 957BCF000090 for ; Thu, 8 Jul 2021 05:31:31 +0000 (UTC) Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 16853hbm076306; Thu, 8 Jul 2021 01:31:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=pp1; bh=+TR4fy56oNM/ZcUQ5CoTl09067k/KlJa7R+GZHNkifs=; b=lhWX+bLS+iwh5PtXkoiyKlh/8wCNXUBpOpGs8SKZ0mo3v2+u96ZV26Eu8VnpIooi6eTZ RVcaI+OzHe+cJ+aZvxNQ5iqK/kNsadO+btfwucGVrClc7jOLdZQxBGp2RsGuYlSU6MI8 Y6KQyhrhadUbgHCXFvbf9P593g6UDFSgyjqAV3LphZMCqi3ZfyKG5lSBsjIzrtGwQ0YJ jsDeB4Dx/ZwV1D6hmH32frsNrTIKPI9nDniXAf2rI/fEOkhNKCItj8RQDMKPwLqp5IiC aBLqs+uS6EwcrGY34wiijGQ2EMLjSWn/4UgdxQ9lDh47kh6/OM8hEO7DQziubpi8daHQ OA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 39n286xekh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 08 Jul 2021 01:31:06 -0400 Received: from m0098409.ppops.net (m0098409.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 16855IHj084283; Thu, 8 Jul 2021 01:31:05 -0400 Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0a-001b2d01.pphosted.com with ESMTP id 39n286xej9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 08 Jul 2021 01:31:05 -0400 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 1685M0e6000965; Thu, 8 Jul 2021 05:31:02 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma06ams.nl.ibm.com with ESMTP id 39jf5ha10n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 08 Jul 2021 05:31:02 +0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 1685V0Ba32899566 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 8 Jul 2021 05:31:00 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2C738AE057; Thu, 8 Jul 2021 05:31:00 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 10DAAAE045; Thu, 8 Jul 2021 05:30:57 +0000 (GMT) Received: from linux.ibm.com (unknown [9.145.167.250]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Thu, 8 Jul 2021 05:30:56 +0000 (GMT) Date: Thu, 8 Jul 2021 08:30:55 +0300 From: Mike Rapoport To: Linus Torvalds Cc: Andrew Morton , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Christoph Lameter , Dan Williams , Dave Hansen , David Hildenbrand , "Reshetova, Elena" , Roman Gushchin , Hagen Paul Pfeifer , Peter Anvin , James Bottomley , James Bottomley , "Kirill A . Shutemov" , Linux-MM , kernel test robot , Andrew Lutomirski , Mark Rutland , Ingo Molnar , mm-commits@vger.kernel.org, Michael Kerrisk-manpages , Palmer Dabbelt , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , "Edgecombe, Rick P" , Shakeel Butt , Shuah Khan , Thomas Gleixner , Tycho Andersen , Al Viro , Will Deacon , Matthew Wilcox Subject: Re: [patch 12/54] PM: hibernate: disable when there are active secretmem users Message-ID: References: <20210707175950.eceddb86c6c555555d4730e2@linux-foundation.org> <20210708010807.hHILhs811%akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-TM-AS-GCONF: 00 X-Proofpoint-GUID: T1eQ2a0pysP6RxLkHXqgg-uuNdtC4Ev1 X-Proofpoint-ORIG-GUID: 5jVsg1SK2xfxbp8RvVFZ3Ga8mSljFfK3 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.790 definitions=2021-07-08_01:2021-07-06,2021-07-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 mlxscore=0 priorityscore=1501 malwarescore=0 suspectscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 mlxlogscore=901 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2107080025 X-Stat-Signature: rkrm6cp53kt3p3rm14b431jyu8h6zoyc X-Rspamd-Queue-Id: 957BCF000090 X-Rspamd-Server: rspam01 X-Rspam-User: nil Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=lhWX+bLS; dmarc=pass (policy=none) header.from=ibm.com; spf=pass (imf16.hostedemail.com: domain of rppt@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=rppt@linux.ibm.com X-HE-Tag: 1625722291-380198 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 Wed, Jul 07, 2021 at 08:15:53PM -0700, Linus Torvalds wrote: > On Wed, Jul 7, 2021 at 6:08 PM Andrew Morton wrote: > > > > Prevent hibernation whenever there are active secret memory users. > > So now anybody can not only use up all memory resources with these > fake mlock regions, they can also force laptops to run out of battery > and crash. Again, this feature should be explicitly enabled on the command line, so people that prefer hibernation to suspend-to-ram won't enable secretmem. -- Sincerely yours, Mike.