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Message-ID: <799314af-e529-bc83-6322-54f5f5d28a40@oracle.com>
Date: Wed, 15 Mar 2017 09:52:54 -0400
From: Boris Ostrovsky <boris.ostrovsky@...cle.com>
To: Thomas Garnier <thgarnie@...gle.com>,
Thomas Gleixner
<tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
"H . Peter Anvin" <hpa@...or.com>, Jonathan Corbet <corbet@....net>,
Andrey Ryabinin <aryabinin@...tuozzo.com>,
Alexander Potapenko <glider@...gle.com>,
Dmitry Vyukov <dvyukov@...gle.com>,
Lorenzo Stoakes <lstoakes@...il.com>,
Kees Cook <keescook@...omium.org>, Juergen Gross <jgross@...e.com>,
Andy Lutomirski <luto@...nel.org>,
Paul Gortmaker <paul.gortmaker@...driver.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Michal Hocko <mhocko@...e.com>, zijun_hu <zijun_hu@....com>,
Chris Wilson <chris@...is-wilson.co.uk>,
Andy Lutomirski <luto@...capital.net>,
"Rafael J . Wysocki"
<rjw@...ysocki.net>,
Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
Jiri Kosina <jikos@...nel.org>,
Matt Fleming <matt@...eblueprint.co.uk>,
Ard Biesheuvel <ard.biesheuvel@...aro.org>,
Rusty Russell <rusty@...tcorp.com.au>,
Paolo Bonzini <pbonzini@...hat.com>, Borislav Petkov <bp@...e.de>,
Christian Borntraeger
<borntraeger@...ibm.com>,
Frederic Weisbecker <fweisbec@...il.com>,
"Luis R . Rodriguez" <mcgrof@...nel.org>,
Stanislaw Gruszka <sgruszka@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Josh Poimboeuf <jpoimboe@...hat.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
Tim Chen
<tim.c.chen@...ux.intel.com>, Joerg Roedel <joro@...tes.org>,
Radim Krčmář <rkrcmar@...hat.com>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
kasan-dev@...glegroups.com, linux-mm@...ck.org,
linux-pm@...r.kernel.org, linux-efi@...r.kernel.org,
xen-devel@...ts.xenproject.org, lguest@...ts.ozlabs.org,
kvm@...r.kernel.org, kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH v7 1/3] x86/mm: Adapt MODULES_END based on Fixmap section
size
On 03/14/2017 01:05 PM, Thomas Garnier 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>
For Xen bits (and to some extent bare-metal):
Reviewed-and-Tested-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
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