linux-kernel - Re: [GIT PULL] x86/mm changes for v5.10

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Message-ID: <CAHk-=wgf8ko=b-F74+Qc+EX6M36kHx5wEBCS8nJK1WSod9UO0w@mail.gmail.com>
Date:   Mon, 12 Oct 2020 15:07:45 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Ingo Molnar <mingo@...nel.org>, Joerg Roedel <jroedel@...e.de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] x86/mm changes for v5.10

On Mon, Oct 12, 2020 at 10:24 AM Ingo Molnar <mingo@...nel.org> wrote:
>
> Do not sync vmalloc/ioremap mappings on x86-64 kernels.
>
> Hopefully now without the bugs!

Let's hope so.

If this turns out to work this time, can we do a similar preallocation
of the page directories on 32-bit? Because I think now x86-32 is the
only remaining case of doing that arch_sync_kernel_mappings() thing.

Or is there some reason that won't work that I've lost sight of?

                   Linus