linux-kernel - Re: [PATCH v3 12/21] slab: remove the do_slab

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Message-ID: <aW8UNjNBXf651a_1@hyeyoo>
Date: Tue, 20 Jan 2026 14:35:50 +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 12/21] slab: remove the do_slab_free() fastpath

On Fri, Jan 16, 2026 at 03:40:32PM +0100, Vlastimil Babka wrote:
> We have removed cpu slab usage from allocation paths. Now remove
> do_slab_free() which was freeing objects to the cpu slab when
> the object belonged to it. Instead call __slab_free() directly,
> which was previously the fallback.
> 
> This simplifies kfree_nolock() - when freeing to percpu sheaf
> fails, we can call defer_free() directly.
> 
> Also remove functions that became unused.
> 
> Reviewed-by: Suren Baghdasaryan <surenb@...gle.com>
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
> ---

The alloc/free path is now a lot simpler!

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

-- 
Cheers,
Harry / Hyeonggon