linux-kernel - Re: [PATCH] mm/slab_common: use SLAB_NO

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Date:   Tue, 13 Jun 2023 16:15:27 -0700 (PDT)
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>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>,
        Roman Gushchin <roman.gushchin@...ux.dev>, linux-mm@...ck.org,
        patches@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/slab_common: use SLAB_NO_MERGE instead of negative
 refcount

On Tue, 13 Jun 2023, Vlastimil Babka wrote:

> When CONFIG_MEMCG_KMEM is enabled, we disable cache merging for
> KMALLOC_NORMAL so they don't end up merged with a cache that uses ad-hoc
> __GFP_ACCOUNT. This was implemented by setting refcount to -1, but now
> we have a proper SLAB_NO_MERGE flag, so use that instead.
> 
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>

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