linux-kernel - Re: [RFC GIT PULL] EFI fixes, memblock quirk

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Message-ID: <CAHk-=wi=ooh9chSKyLipU6+eFbdfc680PUn3uKEoxLAMDMyMgg@mail.gmail.com>
Date:   Sun, 17 Feb 2019 09:24:07 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Tejun Heo <tj@...nel.org>, Yinghai Lu <yinghai@...nel.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Tang Chen <tangchen@...fujitsu.com>,
        Alexander Kuleshov <kuleshovmail@...il.com>
Subject: Re: [RFC GIT PULL] EFI fixes, memblock quirk

On Sun, Feb 17, 2019 at 2:59 AM Ingo Molnar <mingo@...nel.org> wrote:
>
> I marked it RFC: please have a second look at the mm/memblock.c change,
> which adds a INIT_MEMBLOCK_RESERVED_REGIONS detour that ARM64 takes for
> these systems.

It's not pretty, but it looks minimal for now. Pulled.

> Perhaps we should upgrade the build time sizing of all platforms to
> INIT_MEMBLOCK_REGIONS+NR_CPUS+1 and thus centrally give an extra
> allocation entry per CPU configured?
>
> Or is there some cleaner solution?

Is there some reason other platforms might want that kind of thing?
If not, then the current hack seems sufficient.

                    Linus