linux-kernel - Re: [PATCH 01/20] mm/slab: remove CONFIG

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Message-ID: <202311132009.8329C2F5D@keescook>
Date:   Mon, 13 Nov 2023 20:11:41 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Vlastimil Babka <vbabka@...e.cz>
Cc:     David Rientjes <rientjes@...gle.com>,
        Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>,
        Roman Gushchin <roman.gushchin@...ux.dev>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, patches@...ts.linux.dev,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Marco Elver <elver@...gle.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Shakeel Butt <shakeelb@...gle.com>,
        Muchun Song <muchun.song@...ux.dev>,
        kasan-dev@...glegroups.com, cgroups@...r.kernel.org
Subject: Re: [PATCH 01/20] mm/slab: remove CONFIG_SLAB from all Kconfig and
 Makefile

On Mon, Nov 13, 2023 at 08:13:42PM +0100, Vlastimil Babka wrote:
> Remove CONFIG_SLAB, CONFIG_DEBUG_SLAB, CONFIG_SLAB_DEPRECATED and
> everything in Kconfig files and mm/Makefile that depends on those. Since
> SLUB is the only remaining allocator, remove the allocator choice, make
> CONFIG_SLUB a "def_bool y" for now and remove all explicit dependencies
> on SLUB as it's now always enabled.
> 
> Everything under #ifdef CONFIG_SLAB, and mm/slab.c is now dead code, all
> code under #ifdef CONFIG_SLUB is now always compiled.
> 
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
> [...]
> diff --git a/mm/Kconfig b/mm/Kconfig
> index 89971a894b60..766aa8f8e553 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -228,47 +228,12 @@ config ZSMALLOC_CHAIN_SIZE
>  
>  menu "SLAB allocator options"

Should this be "Slab allocator options" ? (I've always understood
"slab" to mean the general idea, and "SLAB" to mean the particular
implementation.

Regardless:

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook