linux-kernel - Re: [PATCH v3 11/21] slab: remove SLUB_CPU

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Message-ID: <CAJuCfpFUsSKf89tVe6u29SpN7sL1X_721H5iv2yGwt-Wa6E_xg@mail.gmail.com>
Date: Wed, 21 Jan 2026 16:22:43 +0000
From: Suren Baghdasaryan <surenb@...gle.com>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Harry Yoo <harry.yoo@...cle.com>, 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>, 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 11/21] slab: remove SLUB_CPU_PARTIAL

On Wed, Jan 21, 2026 at 2:22 PM Vlastimil Babka <vbabka@...e.cz> wrote:
>
> On 1/20/26 23:25, Suren Baghdasaryan wrote:
> > On Fri, Jan 16, 2026 at 2:40 PM Vlastimil Babka <vbabka@...e.cz> wrote:
> >>
> >> We have removed the partial slab usage from allocation paths. Now remove
> >> the whole config option and associated code.
> >>
> >> Reviewed-by: Suren Baghdasaryan <surenb@...gle.com>
> >
> > I did?
>
> Hmm looks like you didn't. Wonder if I screwed up, or b4 did. Sorry about that.

No worries.

>
> > Well, if so, I missed some remaining mentions about cpu partial caches:
> > - slub.c has several hits on "cpu partial" in the comments.
> > - there is one hit on "put_cpu_partial" in slub.c in the comments.
>
> Should be addressed later by [PATCH v3 18/21] slab: update overview
> comments. I'll grep the result if anything is missing.
>
> > Should we also update Documentation/ABI/testing/sysfs-kernel-slab to
> > say that from now on cpu_partial control always reads 0?
>
> Uh those weird files. Does anyone care? I'd do that separately as well...

I'm fine either way. Thanks!

>
> > Once addressed, please feel free to keep my Reviewed-by.
>
> Thanks!
>