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Re: [Xen-devel] [PATCH v7 1/3] x86/mm: Adapt MODULES_END based on Fixmap section size
- To: Thomas Garnier <thgarnie@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "H . Peter Anvin" <hpa@xxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>, Alexander Potapenko <glider@xxxxxxxxxx>, Dmitry Vyukov <dvyukov@xxxxxxxxxx>, Lorenzo Stoakes <lstoakes@xxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, zijun_hu <zijun_hu@xxxxxxx>, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxxxxxx>, "Rafael J . Wysocki" <rjw@xxxxxxxxxxxxx>, Len Brown <len.brown@xxxxxxxxx>, Pavel Machek <pavel@xxxxxx>, Jiri Kosina <jikos@xxxxxxxxxx>, Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxx>, Frederic Weisbecker <fweisbec@xxxxxxxxx>, "Luis R . Rodriguez" <mcgrof@xxxxxxxxxx>, Stanislaw Gruszka <sgruszka@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Josh Poimboeuf <jpoimboe@xxxxxxxxxx>, Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>, Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, Radim Krčmář <rkrcmar@xxxxxxxxxx>
- From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- Date: Wed, 15 Mar 2017 09:52:54 -0400
- Cc: linux-efi@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-pm@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, kasan-dev@xxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, lguest@xxxxxxxxxxxxxxxx, kernel-hardening@xxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 15 Mar 2017 13:56:50 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
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@xxxxxxxxxx>
For Xen bits (and to some extent bare-metal):
Reviewed-and-Tested-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
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