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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 16948C433DB for ; Mon, 8 Feb 2021 13:34:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 918F064E0B for ; Mon, 8 Feb 2021 13:34:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 918F064E0B Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E91DA6B0006; Mon, 8 Feb 2021 08:34:46 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id E1B966B006C; Mon, 8 Feb 2021 08:34:46 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CBE6E6B006E; Mon, 8 Feb 2021 08:34:46 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0171.hostedemail.com [216.40.44.171]) by kanga.kvack.org (Postfix) with ESMTP id AFC6F6B0006 for ; Mon, 8 Feb 2021 08:34:46 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 7B4ED8249980 for ; Mon, 8 Feb 2021 13:34:46 +0000 (UTC) X-FDA: 77795195772.15.crime24_530faf7275ff Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin15.hostedemail.com (Postfix) with ESMTP id 42DFD1814B0C7 for ; Mon, 8 Feb 2021 13:34:46 +0000 (UTC) X-HE-Tag: crime24_530faf7275ff X-Filterd-Recvd-Size: 4397 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf09.hostedemail.com (Postfix) with ESMTP for ; Mon, 8 Feb 2021 13:34:45 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1612791284; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=tPdxySZddbQD9qXDKMPnVWIQTa7PPiE4Qwe7qfgymrs=; b=Ws1lDxg/c1OUiwJ+n1TiJoYFn0hPPDdML5K4+HkUiiEWmfvzMQjPpO3/qn1jln4ONS/kQr iAi2I/2SSVcImlpMcLn9sGvyK1nH8qeEtezsgDdAsfxEiDnjlAtRKDe8fv4OppLwE1jcQF IWgpduuoLm3r0wY2pkrb6rXd+NrR404= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id EAC5AAE47; Mon, 8 Feb 2021 13:34:43 +0000 (UTC) Date: Mon, 8 Feb 2021 14:34:37 +0100 From: Michal Hocko To: David Hildenbrand Cc: Mike Rapoport , Andrew Morton , Alexander Viro , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Christopher Lameter , Dan Williams , Dave Hansen , Elena Reshetova , "H. Peter Anvin" , Ingo Molnar , James Bottomley , "Kirill A. Shutemov" , Matthew Wilcox , Mark Rutland , Mike Rapoport , Michael Kerrisk , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , Rick Edgecombe , Roman Gushchin , Shakeel Butt , Shuah Khan , Thomas Gleixner , Tycho Andersen , Will Deacon , linux-api@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, linux-riscv@lists.infradead.org, x86@kernel.org, Hagen Paul Pfeifer , Palmer Dabbelt , "Rafael J. Wysocki" Subject: Re: [PATCH v17 08/10] PM: hibernate: disable when there are active secretmem users Message-ID: References: <20210208084920.2884-9-rppt@kernel.org> <38c0cad4-ac55-28e4-81c6-4e0414f0620a@redhat.com> <770690dc-634a-78dd-0772-3aba1a3beba8@redhat.com> <21f4e742-1aab-f8ba-f0e7-40faa6d6c0bb@redhat.com> <5db6ac46-d4e1-3c68-22a0-94f2ecde8801@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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: Btw. I do not see Rafael involved. Maybe he can add some insight to this. Please note that the patch in question is http://lkml.kernel.org/r/20210208084920.2884-9-rppt@kernel.org and the full series is http://lkml.kernel.org/r/20210208084920.2884-1-rppt@kernel.org On Mon 08-02-21 13:17:26, Michal Hocko wrote: > On Mon 08-02-21 12:26:31, David Hildenbrand wrote: > [...] > > My F33 system happily hibernates to disk, even with an application that > > succeeded in din doing an mlockall(). > > > > And it somewhat makes sense. Even my freshly-booted, idle F33 has > > > > $ cat /proc/meminfo | grep lock > > Mlocked: 4860 kB > > > > So, stopping to hibernate with mlocked memory would essentially prohibit any > > modern Linux distro to hibernate ever. > > My system seems to be completely fine without mlocked memory. It would > be interesting to see who mlocks memory on your system and check whether > the expectated mlock semantic really works for those. This should be > documented at least. > -- > Michal Hocko > SUSE Labs -- Michal Hocko SUSE Labs