From: Harry Yoo <harry.yoo@oracle.com>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Uladzislau Rezki <urezki@gmail.com>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Suren Baghdasaryan <surenb@google.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Alexei Starovoitov <ast@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-rt-devel@lists.linux.dev, bpf@vger.kernel.org,
kasan-dev@googlegroups.com
Subject: Re: [PATCH RFC 05/19] slab: add sheaves to most caches
Date: Mon, 27 Oct 2025 09:24:17 +0900 [thread overview]
Message-ID: <aP67sQ2dD73iXubl@hyeyoo> (raw)
In-Reply-To: <20251023-sheaves-for-all-v1-5-6ffa2c9941c0@suse.cz>
On Thu, Oct 23, 2025 at 03:52:27PM +0200, Vlastimil Babka wrote:
> In the first step to replace cpu (partial) slabs with sheaves, enable
> sheaves for almost all caches. Treat args->sheaf_capacity as a minimum,
> and calculate sheaf capacity with a formula that roughly follows the
> formula for number of objects in cpu partial slabs in set_cpu_partial().
Should we scale sheaf capacity not only based on object size but also
on the number of CPUs, like calculate_order() does?
> This should achieve roughly similar contention on the barn spin lock as
> there's currently for node list_lock without sheaves, to make
> benchmarking results comparable. It can be further tuned later.
>
> Don't enable sheaves for kmalloc caches yet, as that needs further
> changes to bootstraping.
>
> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
> ---
--
Cheers,
Harry / Hyeonggon
next prev parent reply other threads:[~2025-10-27 0:25 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-23 13:52 [PATCH RFC 00/19] slab: replace cpu (partial) slabs with sheaves Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 01/19] slab: move kfence_alloc() out of internal bulk alloc Vlastimil Babka
2025-10-23 15:20 ` Marco Elver
2025-10-29 14:38 ` Vlastimil Babka
2025-10-29 15:30 ` Marco Elver
2025-10-23 13:52 ` [PATCH RFC 02/19] slab: handle pfmemalloc slabs properly with sheaves Vlastimil Babka
2025-10-24 14:21 ` Chris Mason
2025-10-29 15:00 ` Vlastimil Babka
2025-10-29 16:06 ` Chris Mason
2025-10-23 13:52 ` [PATCH RFC 03/19] slub: remove CONFIG_SLUB_TINY specific code paths Vlastimil Babka
2025-10-24 22:34 ` Alexei Starovoitov
2025-10-29 15:37 ` Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 04/19] slab: prevent recursive kmalloc() in alloc_empty_sheaf() Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 05/19] slab: add sheaves to most caches Vlastimil Babka
2025-10-27 0:24 ` Harry Yoo [this message]
2025-10-29 15:42 ` Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 06/19] slab: introduce percpu sheaves bootstrap Vlastimil Babka
2025-10-24 15:29 ` Chris Mason
2025-10-29 15:51 ` Vlastimil Babka
2025-12-15 12:17 ` Hao Li
2025-12-15 15:20 ` Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 07/19] slab: make percpu sheaves compatible with kmalloc_nolock()/kfree_nolock() Vlastimil Babka
2025-10-24 14:04 ` Chris Mason
2025-10-29 17:30 ` Vlastimil Babka
2025-10-24 19:43 ` Alexei Starovoitov
2025-10-29 17:46 ` Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 08/19] slab: handle kmalloc sheaves bootstrap Vlastimil Babka
2025-10-27 6:12 ` Harry Yoo
2025-10-29 20:06 ` Vlastimil Babka
2025-10-29 20:06 ` Vlastimil Babka
2025-10-30 0:11 ` Harry Yoo
2025-10-23 13:52 ` [PATCH RFC 09/19] slab: add optimized sheaf refill from partial list Vlastimil Babka
2025-10-27 7:20 ` Harry Yoo
2025-10-27 9:11 ` Harry Yoo
2025-10-29 20:48 ` Vlastimil Babka
2025-10-30 0:07 ` Harry Yoo
2025-10-30 13:18 ` Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 10/19] slab: remove cpu (partial) slabs usage from allocation paths Vlastimil Babka
2025-10-24 14:29 ` Chris Mason
2025-10-29 21:31 ` Vlastimil Babka
2026-01-09 8:16 ` Vlastimil Babka
2026-01-10 13:20 ` Chris Mason
2026-01-10 15:41 ` Vlastimil Babka
2026-01-12 14:36 ` Chris Mason
2026-01-13 18:51 ` Roman Gushchin
2025-10-30 4:32 ` Harry Yoo
2025-10-30 13:09 ` Vlastimil Babka
2025-10-30 15:27 ` Alexei Starovoitov
2025-10-30 15:35 ` Vlastimil Babka
2025-10-30 15:59 ` Alexei Starovoitov
2025-11-03 3:44 ` Harry Yoo
2025-10-23 13:52 ` [PATCH RFC 11/19] slab: remove SLUB_CPU_PARTIAL Vlastimil Babka
2025-10-24 20:43 ` Alexei Starovoitov
2025-10-29 22:31 ` Vlastimil Babka
2025-10-30 0:26 ` Alexei Starovoitov
2025-10-23 13:52 ` [PATCH RFC 12/19] slab: remove the do_slab_free() fastpath Vlastimil Babka
2025-10-24 22:32 ` Alexei Starovoitov
2025-10-29 22:44 ` Vlastimil Babka
2025-10-30 0:24 ` Alexei Starovoitov
2025-10-23 13:52 ` [PATCH RFC 13/19] slab: remove defer_deactivate_slab() Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 14/19] slab: simplify kmalloc_nolock() Vlastimil Babka
2025-12-16 2:35 ` Hao Li
2026-01-09 10:11 ` Vlastimil Babka
2026-01-09 11:48 ` Hao Li
2025-10-23 13:52 ` [PATCH RFC 15/19] slab: remove struct kmem_cache_cpu Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 16/19] slab: remove unused PREEMPT_RT specific macros Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 17/19] slab: refill sheaves from all nodes Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 18/19] slab: update overview comments Vlastimil Babka
2025-10-23 13:52 ` [PATCH RFC 19/19] slab: remove frozen slab checks from __slab_free() Vlastimil Babka
2025-10-24 23:57 ` [PATCH RFC 00/19] slab: replace cpu (partial) slabs with sheaves Alexei Starovoitov
2025-11-04 22:11 ` Christoph Lameter (Ampere)
2026-01-12 10:55 ` Vlastimil Babka
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