linux-kernel - Re: [PATCH 0/2] riscv: Increase mmap_rnd_bits

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Message-ID: <CABCJKudpbeJ+Orie3oMiWrYS0qsh+ZxXbz9tTJcHKvJjiOX+=Q@mail.gmail.com>
Date: Wed, 17 Jan 2024 12:29:12 -0800
From: Sami Tolvanen <samitolvanen@...gle.com>
To: Palmer Dabbelt <palmer@...belt.com>
Cc: Paul Walmsley <paul.walmsley@...ive.com>, aou@...s.berkeley.edu, 
	akpm@...ux-foundation.org, keescook@...omium.org, linux-mm@...ck.org, 
	linux-riscv@...ts.infradead.org, llvm@...ts.linux.dev, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] riscv: Increase mmap_rnd_bits_max on Sv48/57

Hi Palmer,

On Wed, Dec 6, 2023 at 5:14 AM Palmer Dabbelt <palmer@...belt.com> wrote:
>
> On Fri, 29 Sep 2023 14:11:56 PDT (-0700), samitolvanen@...gle.com wrote:
> > Hi all,
> >
> > We noticed that 64-bit RISC-V kernels limit mmap_rnd_bits to 24
> > even if the hardware supports a larger virtual address space size
> > [1]. These two patches allow mmap_rnd_bits_max to be changed during
> > init, and bumps up the maximum randomness if we end up setting up
> > 4/5-level paging at boot.
>
> Sorry for missing this, I'm just poking through old stuff in patchwork.
> As far as I can tell this is still relevant, the discussions are just on
> the mmap() bits (but we'd already screwed that one up and have since
> fixed it).
>
> So
>
> Reviewed-by: Palmer Dabbelt <palmer@...osinc.com>
> Acked-by: Palmer Dabbelt <palmer@...osinc.com>
>
> in case someone else wants to take it, but I'm OK taking that MM patch
> with Kees' review.

Is this still on your radar for v6.8 or would you prefer me to resend
the patches?

Sami