linux-kernel - Re: [PATCH v3 04/19] mm: slub: implement SLUB version of obj_to

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Date:   Wed, 22 Apr 2020 23:52:13 +0000 (UTC)
From:   Christopher Lameter <cl@...ux.com>
To:     Roman Gushchin <guro@...com>
cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>, linux-mm@...ck.org,
        kernel-team@...com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 04/19] mm: slub: implement SLUB version of
 obj_to_index()

On Wed, 22 Apr 2020, Roman Gushchin wrote:

>  enum stat_item {
>  	ALLOC_FASTPATH,		/* Allocation from cpu slab */
> @@ -86,6 +87,7 @@ struct kmem_cache {
>  	unsigned long min_partial;
>  	unsigned int size;	/* The size of an object including metadata */
>  	unsigned int object_size;/* The size of an object without metadata */
> +	struct reciprocal_value reciprocal_size;


This needs to be moved further back since it is not an item that needs to
be cache hot for the hotpaths. Place it with "align", inuse etc?

Hmmm. the same applies to min_partial maybe?