linux-kernel - Re: [PATCH v1] mm/slub: enable debugging memory wasting of kmalloc

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Message-ID: <alpine.DEB.2.22.394.2207011635040.588600@gentwo.de>
Date:   Fri, 1 Jul 2022 16:37:00 +0200 (CEST)
From:   Christoph Lameter <cl@...two.de>
To:     Feng Tang <feng.tang@...el.com>
cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, dave.hansen@...el.com,
        Robin Murphy <robin.murphy@....com>,
        John Garry <john.garry@...wei.com>
Subject: Re: [PATCH v1] mm/slub: enable debugging memory wasting of kmalloc

On Fri, 1 Jul 2022, Feng Tang wrote:

>  static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
> -			  unsigned long addr, struct kmem_cache_cpu *c)
> +			  unsigned long addr, struct kmem_cache_cpu *c, unsigned int orig_size)
>  {

It would be good to avoid expanding the basic slab handling functions for
kmalloc. Can we restrict the mods to the kmalloc related functions?