linux-kernel - Re: [PATCH v3 15/21] slab: remove struct kmem_cache

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Message-ID: <aXGVCmvvt2N3Xcgd@hyeyoo>
Date: Thu, 22 Jan 2026 12:10:02 +0900
From: Harry Yoo <harry.yoo@...cle.com>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Petr Tesarik <ptesarik@...e.com>, Christoph Lameter <cl@...two.org>,
        David Rientjes <rientjes@...gle.com>,
        Roman Gushchin <roman.gushchin@...ux.dev>, Hao Li <hao.li@...ux.dev>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Uladzislau Rezki <urezki@...il.com>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Alexei Starovoitov <ast@...nel.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-rt-devel@...ts.linux.dev,
        bpf@...r.kernel.org, kasan-dev@...glegroups.com
Subject: Re: [PATCH v3 15/21] slab: remove struct kmem_cache_cpu

On Fri, Jan 16, 2026 at 03:40:35PM +0100, Vlastimil Babka wrote:
> The cpu slab is not used anymore for allocation or freeing, the
> remaining code is for flushing, but it's effectively dead.  Remove the
> whole struct kmem_cache_cpu, the flushing code and other orphaned
> functions.
> 
> The remaining used field of kmem_cache_cpu is the stat array with
> CONFIG_SLUB_STATS. Put it instead in a new struct kmem_cache_stats.
> In struct kmem_cache, the field is cpu_stats and placed near the
> end of the struct.
> 
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
> ---

Looks good to me,
Reviewed-by: Harry Yoo <harry.yoo@...cle.com>

-- 
Cheers,
Harry / Hyeonggon