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=-3.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 2F946C433E6 for ; Mon, 22 Feb 2021 10:24:22 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C679464E31 for ; Mon, 22 Feb 2021 10:24:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C679464E31 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 32B98100EBB76; Mon, 22 Feb 2021 02:24:21 -0800 (PST) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=rppt@kernel.org; receiver= Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 662C7100EC1E4 for ; Mon, 22 Feb 2021 02:24:18 -0800 (PST) Received: by mail.kernel.org (Postfix) with ESMTPSA id 09BB564E2F; Mon, 22 Feb 2021 10:24:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1613989457; bh=hPfUfFtTmjkrQbsktsKt6yfqMzt3/NRJ4jjF/NEBc8g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=b3V9NfUxwhwIYN04tZ4xVJ3p5sqw8LDNui76vseSDtV/Re6690BnkfF+nR9DcxpOG pUgE90vqEFMU/X/MPAhMaZnhkphLp2hZD3Ly/S74TC7UD+nyJ2MxvQgUFzQn0n4cWr O38zmX3c++0vqSgjip+sme4YMMtTL5UAgX7/Dvrcr8EOMRxrQU75JWaHMRk39qP/AW lgAw/KQkfggAeoHx3YM+5n3m6vnlhaY/3Jp3VStjpjmNap+nGK6+o3g9qwoOyHxtFy vWZY83MCClCfU5xmCjWJ66fOJT92kzAT9sZgszmOAF/eGW/eyThqm6caGmwW8QA7LL 32a3PdFZcp9HQ== Date: Mon, 22 Feb 2021 12:23:59 +0200 From: Mike Rapoport To: Matthew Garrett Subject: Re: [PATCH v17 08/10] PM: hibernate: disable when there are active secretmem users Message-ID: <20210222102359.GE1447004@kernel.org> References: <20210208084920.2884-1-rppt@kernel.org> <20210208084920.2884-9-rppt@kernel.org> <20210222073452.GA30403@codon.org.uk> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210222073452.GA30403@codon.org.uk> Message-ID-Hash: RQ2CTG7RSUZAGIGVMM6SNWSC4VCU3CAI X-Message-ID-Hash: RQ2CTG7RSUZAGIGVMM6SNWSC4VCU3CAI X-MailFrom: rppt@kernel.org X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Andrew Morton , Alexander Viro , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Christopher Lameter , Dave Hansen , David Hildenbrand , Elena Reshetova , "H. Peter Anvin" , Ingo Molnar , James Bottomley , "Kirill A. Shutemov" , Matthew Wilcox , Mark Rutland , Michal Hocko , Mike Rapoport , Michael Kerrisk , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , Rick Edgecombe , Roman Gushchin , Shakeel Butt , Shuah Khan , Thomas Gleix ner , 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 X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On Mon, Feb 22, 2021 at 07:34:52AM +0000, Matthew Garrett wrote: > On Mon, Feb 08, 2021 at 10:49:18AM +0200, Mike Rapoport wrote: > > > It is unsafe to allow saving of secretmem areas to the hibernation > > snapshot as they would be visible after the resume and this essentially > > will defeat the purpose of secret memory mappings. > > Sorry for being a bit late to this - from the point of view of running > processes (and even the kernel once resume is complete), hibernation is > effectively equivalent to suspend to RAM. Why do they need to be handled > differently here? Hibernation leaves a copy of the data on the disk which we want to prevent. -- Sincerely yours, Mike. _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org