linux-kernel - Re: [PATCH v2 3/3] mm, slab, kasan: replace kasan_never_merge() with SLAB_NO

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Date: Sat, 24 Feb 2024 13:02:37 -0800 (PST)
From: David Rientjes <rientjes@...gle.com>
To: Vlastimil Babka <vbabka@...e.cz>
cc: Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>, 
    Joonsoo Kim <iamjoonsoo.kim@....com>, 
    Andrew Morton <akpm@...ux-foundation.org>, 
    Roman Gushchin <roman.gushchin@...ux.dev>, 
    Hyeonggon Yoo <42.hyeyoo@...il.com>, 
    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>, 
    Zheng Yejian <zhengyejian1@...wei.com>, 
    Xiongwei Song <xiongwei.song@...driver.com>, 
    Chengming Zhou <chengming.zhou@...ux.dev>, linux-mm@...ck.org, 
    linux-kernel@...r.kernel.org, kasan-dev@...glegroups.com
Subject: Re: [PATCH v2 3/3] mm, slab, kasan: replace kasan_never_merge() with
 SLAB_NO_MERGE

On Fri, 23 Feb 2024, Vlastimil Babka wrote:

> The SLAB_KASAN flag prevents merging of caches in some configurations,
> which is handled in a rather complicated way via kasan_never_merge().
> Since we now have a generic SLAB_NO_MERGE flag, we can instead use it
> for KASAN caches in addition to SLAB_KASAN in those configurations,
> and simplify the SLAB_NEVER_MERGE handling.
> 
> Tested-by: Xiongwei Song <xiongwei.song@...driver.com>
> Reviewed-by: Chengming Zhou <chengming.zhou@...ux.dev>
> Reviewed-by: Andrey Konovalov <andreyknvl@...il.com>
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>

Tested-by: David Rientjes <rientjes@...gle.com>