linux-kernel - Re: [PATCH v1 1/3] x86/mm: Adapt MODULES

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Message-ID: <CALCETrVt38oa6C+-JD1B+4wXnkB8ySUksZ55k0+Bz4dbusYWDA@mail.gmail.com>
Date:   Fri, 20 Jan 2017 14:24:42 -0800
From:   Andy Lutomirski <luto@...capital.net>
To:     Thomas Garnier <thgarnie@...gle.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Kees Cook <keescook@...omium.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>, Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...e.de>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Brian Gerst <brgerst@...il.com>,
        He Chen <he.chen@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Chen Yucong <slaoub@...il.com>, Baoquan He <bhe@...hat.com>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Joerg Roedel <joro@...tes.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Fenghua Yu <fenghua.yu@...el.com>, X86 ML <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        kvm list <kvm@...r.kernel.org>,
        "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH v1 1/3] x86/mm: Adapt MODULES_END based on Fixmap section size

On Fri, Jan 20, 2017 at 8:41 AM, Thomas Garnier <thgarnie@...gle.com> wrote:
> This patch aligns MODULES_END to the beginning of the Fixmap section.
> It optimizes the space available for both sections. The address is
> pre-computed based on the number of pages required by the Fixmap
> section.
>
> It will allow GDT remapping in the Fixmap section. The current
> MODULES_END static address does not provide enough space for the kernel
> to support a large number of processors.
>
> Signed-off-by: Thomas Garnier <thgarnie@...gle.com>

Looks good to me.