linux-kernel - Re: [PATCH v4 09/36] mm/slab: introduce SLAB_NO_OBJ_EXT to avoid obj

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Message-ID: <206b677f-0523-482f-b42b-2cdaf7ab8db9@suse.cz>
Date: Mon, 26 Feb 2024 17:52:14 +0100
From: Vlastimil Babka <vbabka@...e.cz>
To: Suren Baghdasaryan <surenb@...gle.com>, akpm@...ux-foundation.org
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Subject: Re: [PATCH v4 09/36] mm/slab: introduce SLAB_NO_OBJ_EXT to avoid
 obj_ext creation

On 2/21/24 20:40, Suren Baghdasaryan wrote:
> Slab extension objects can't be allocated before slab infrastructure is
> initialized. Some caches, like kmem_cache and kmem_cache_node, are created
> before slab infrastructure is initialized. Objects from these caches can't
> have extension objects. Introduce SLAB_NO_OBJ_EXT slab flag to mark these
> caches and avoid creating extensions for objects allocated from these
> slabs.
> 
> Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
> Reviewed-by: Kees Cook <keescook@...omium.org>

Reviewed-by: Vlastimil Babka <vbabka@...e.cz>