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[2a01:7a0:2:106d:700::1]) by mx.google.com with ESMTPS id z10si8068873wro.431.2019.06.16.15.28.32 for (version=TLS1_2 cipher=AES128-SHA bits=128/128); Sun, 16 Jun 2019 15:28:32 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of tglx@linutronix.de designates 2a01:7a0:2:106d:700::1 as permitted sender) client-ip=2a01:7a0:2:106d:700::1; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of tglx@linutronix.de designates 2a01:7a0:2:106d:700::1 as permitted sender) smtp.mailfrom=tglx@linutronix.de Received: from p5b06daab.dip0.t-ipconnect.de ([91.6.218.171] helo=nanos) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1hcddU-0000Ux-NY; Mon, 17 Jun 2019 00:28:28 +0200 Date: Mon, 17 Jun 2019 00:28:27 +0200 (CEST) From: Thomas Gleixner To: Andy Lutomirski cc: Dave Hansen , Marius Hillenbrand , kvm list , LKML , Kernel Hardening , Linux-MM , Alexander Graf , David Woodhouse , the arch/x86 maintainers , Peter Zijlstra Subject: Re: [RFC 00/10] Process-local memory allocations for hiding KVM secrets In-Reply-To: Message-ID: References: <20190612170834.14855-1-mhillenb@amazon.de> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="8323329-1576819727-1560724108=:1760" X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000406, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --8323329-1576819727-1560724108=:1760 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT On Sun, 16 Jun 2019, Andy Lutomirski wrote: > On Fri, Jun 14, 2019 at 7:21 AM Thomas Gleixner wrote: > > On Wed, 12 Jun 2019, Andy Lutomirski wrote: > > > > > > Fair warning: Linus is on record as absolutely hating this idea. He might > > > change his mind, but it’s an uphill battle. > > > > Yes I know, but as a benefit we could get rid of all the GSBASE horrors in > > the entry code as we could just put the percpu space into the local PGD. > > > > I have personally suggested this to Linus on a couple of occasions, > and he seemed quite skeptical. The only way to find out is the good old: numbers talk .... So someone has to bite the bullet, implement it and figure out whether it's bollocks or not. :) Thanks, tglx --8323329-1576819727-1560724108=:1760--