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Message-ID: <alpine.DEB.2.20.1708161106370.11379@nuc-kabylake>
Date: Wed, 16 Aug 2017 11:09:27 -0500 (CDT)
From: Christopher Lameter <cl@...ux.com>
To: Ingo Molnar <mingo@...nel.org>
cc: Thomas Garnier <thgarnie@...gle.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S . Miller" <davem@...emloft.net>,
Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
"H . Peter Anvin" <hpa@...or.com>, Peter Zijlstra <peterz@...radead.org>,
Josh Poimboeuf <jpoimboe@...hat.com>, Arnd Bergmann <arnd@...db.de>,
Matthias Kaehlcke <mka@...omium.org>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Juergen Gross <jgross@...e.com>, Paolo Bonzini <pbonzini@...hat.com>,
Radim Krčmář <rkrcmar@...hat.com>,
Joerg Roedel <joro@...tes.org>, Tom Lendacky <thomas.lendacky@....com>,
Andy Lutomirski <luto@...nel.org>, Borislav Petkov <bp@...e.de>,
Brian Gerst <brgerst@...il.com>,
"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
"Rafael J . Wysocki" <rjw@...ysocki.net>, Len Brown <len.brown@...el.com>,
Pavel Machek <pavel@....cz>, Tejun Heo <tj@...nel.org>,
Paul Gortmaker <paul.gortmaker@...driver.com>,
Chris Metcalf <cmetcalf@...lanox.com>,
Andrew Morton <akpm@...ux-foundation.org>,
"Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
Nicolas Pitre <nicolas.pitre@...aro.org>,
Christopher Li <sparse@...isli.org>,
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Lukas Wunner <lukas@...ner.de>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
Dou Liyang <douly.fnst@...fujitsu.com>,
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Alexei Starovoitov <ast@...nel.org>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Markus Trippelsdorf <markus@...ppelsdorf.de>,
Steven Rostedt <rostedt@...dmis.org>, Kees Cook <keescook@...omium.org>,
Rik van Riel <riel@...hat.com>, David Howells <dhowells@...hat.com>,
Waiman Long <longman@...hat.com>, Kyle Huey <me@...ehuey.com>,
Peter Foley <pefoley2@...oley.com>, Tim Chen <tim.c.chen@...ux.intel.com>,
Catalin Marinas <catalin.marinas@....com>,
Ard Biesheuvel <ard.biesheuvel@...aro.org>, Michal Hocko <mhocko@...e.com>,
Matthew Wilcox <mawilcox@...rosoft.com>,
"H . J . Lu" <hjl.tools@...il.com>, Paul Bolle <pebolle@...cali.nl>,
Rob Landley <rob@...dley.net>, Baoquan He <bhe@...hat.com>,
Daniel Micay <danielmicay@...il.com>,
the arch/x86 maintainers <x86@...nel.org>, linux-crypto@...r.kernel.org,
LKML <linux-kernel@...r.kernel.org>, xen-devel@...ts.xenproject.org,
kvm list <kvm@...r.kernel.org>, Linux PM list <linux-pm@...r.kernel.org>,
linux-arch <linux-arch@...r.kernel.org>, linux-sparse@...r.kernel.org,
Kernel Hardening <kernel-hardening@...ts.openwall.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>, Borislav Petkov <bp@...en8.de>
Subject: Re: x86: PIE support and option to extend KASLR randomization
On Wed, 16 Aug 2017, Ingo Molnar wrote:
> And we'd do this for _EVERY_ function call in the kernel. That kind of crap is
> totally unacceptable.
Ahh finally a limit is in sight as to how much security hardening etc can
reduce kernel performance.
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