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Message-ID: <627fe5d2-e6c3-4eff-1a58-14e17dc04ac5@zytor.com>
Date: Wed, 4 Mar 2020 11:22:04 -0800
From: "H. Peter Anvin" <hpa@...or.com>
To: Thomas Garnier <thgarnie@...omium.org>
Cc: Kees Cook <keescook@...omium.org>, Peter Zijlstra <peterz@...radead.org>,
Kristen Carlson Accardi <kristen@...ux.intel.com>,
Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
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Kernel Hardening <kernel-hardening@...ts.openwall.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>,
the arch/x86 maintainers <x86@...nel.org>,
Andy Lutomirski
<luto@...nel.org>, Juergen Gross <jgross@...e.com>,
Thomas Hellstrom <thellstrom@...are.com>,
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"Rafael J. Wysocki"
<rjw@...ysocki.net>,
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Subject: Re: [PATCH v11 00/11] x86: PIE support to extend KASLR randomization
On 2020-03-04 11:19, Thomas Garnier wrote:
>>
>> The huge memory model, required for arbitrary placement, has a very
>> significant performance impact.
>
> I assume you mean mcmodel=large, it doesn't use it. It uses -fPIE and
> removes -mcmodel=kernel. It favors relative references whenever
> possible.
>
I know... this was in reference to a comment of Kees'.
-hpa
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