linux-kernel - Re: [PATCH 0/8] Convert powerpc to default topdown mmap layout

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Message-Id: <1637759994.e3mppl4ly7.astroid@bobo.none>
Date:   Wed, 24 Nov 2021 23:21:28 +1000
From:   Nicholas Piggin <npiggin@...il.com>
To:     alex@...ti.fr, Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Michael Ellerman <mpe@...erman.id.au>,
        Paul Mackerras <paulus@...ba.org>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 0/8] Convert powerpc to default topdown mmap layout

Excerpts from Christophe Leroy's message of November 22, 2021 6:48 pm:
> This series converts powerpc to default topdown mmap layout.
> 
> powerpc provides its own arch_get_unmapped_area() only when
> slices are needed, which is only for book3s/64. First part of
> the series moves slices into book3s/64 specific directories
> and cleans up other subarchitectures.
> 
> Then a small modification is done to core mm to allow
> powerpc to still provide its own arch_randomize_brk()
> 
> Last part converts to default topdown mmap layout.

A nice series but will clash badly with the CONFIG_HASH_MMU 
series of course. One will have to be rebased if they are
both to be merged.

Thanks,
Nick