From: Breno Leitao <leitao@debian.org>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Harry Yoo <harry.yoo@oracle.com>,
Petr Tesarik <ptesarik@suse.com>,
Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Hao Li <hao.li@linux.dev>,
Andrew Morton <akpm@linux-foundation.org>,
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 v4 06/22] slab: add sheaves to most caches
Date: Mon, 26 Jan 2026 05:59:28 -0800 [thread overview]
Message-ID: <aXdzLk010qbTNbUh@gmail.com> (raw)
In-Reply-To: <20260123-sheaves-for-all-v4-6-041323d506f7@suse.cz>
On Fri, Jan 23, 2026 at 07:52:44AM +0100, 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().
>
> 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 bootstrap caches as that wouldn't work. In
> order to recognize them by SLAB_NO_OBJ_EXT, make sure the flag exists
> even for !CONFIG_SLAB_OBJ_EXT.
>
> This limitation will be lifted for kmalloc caches after the necessary
> bootstrapping changes.
>
> Also do not enable sheaves for SLAB_NOLEAKTRACE caches to avoid
> recursion with kmemleak tracking (thanks to Breno Leitao).
>
> Reviewed-by: Suren Baghdasaryan <surenb@google.com>
> Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Tested-by: Breno Leitao <leitao@debian.org>
next prev parent reply other threads:[~2026-01-26 13:59 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-23 6:52 [PATCH v4 00/22] slab: replace cpu (partial) slabs with sheaves Vlastimil Babka
2026-01-23 6:52 ` [PATCH v4 01/22] mm/slab: add rcu_barrier() to kvfree_rcu_barrier_on_cache() Vlastimil Babka
2026-01-27 16:08 ` Liam R. Howlett
2026-01-23 6:52 ` [PATCH v4 02/22] mm/slab: fix false lockdep warning in __kfree_rcu_sheaf() Vlastimil Babka
2026-01-23 12:03 ` Sebastian Andrzej Siewior
2026-01-24 10:58 ` Harry Yoo
2026-01-23 6:52 ` [PATCH v4 03/22] slab: add SLAB_CONSISTENCY_CHECKS to SLAB_NEVER_MERGE Vlastimil Babka
2026-01-23 6:52 ` [PATCH v4 04/22] mm/slab: move and refactor __kmem_cache_alias() Vlastimil Babka
2026-01-27 16:17 ` Liam R. Howlett
2026-01-27 16:59 ` Vlastimil Babka
2026-01-23 6:52 ` [PATCH v4 05/22] mm/slab: make caches with sheaves mergeable Vlastimil Babka
2026-01-27 16:23 ` Liam R. Howlett
2026-01-23 6:52 ` [PATCH v4 06/22] slab: add sheaves to most caches Vlastimil Babka
2026-01-26 6:36 ` Hao Li
2026-01-26 8:39 ` Vlastimil Babka
2026-01-26 13:59 ` Breno Leitao [this message]
2026-01-27 16:34 ` Liam R. Howlett
2026-01-27 17:01 ` Vlastimil Babka
2026-01-29 7:24 ` Zhao Liu
2026-01-29 8:21 ` Vlastimil Babka
2026-01-30 7:15 ` Zhao Liu
2026-02-04 18:01 ` Vlastimil Babka
2026-01-23 6:52 ` [PATCH v4 07/22] slab: introduce percpu sheaves bootstrap Vlastimil Babka
2026-01-26 6:13 ` Hao Li
2026-01-26 8:42 ` Vlastimil Babka
2026-01-27 17:31 ` Liam R. Howlett
2026-01-23 6:52 ` [PATCH v4 08/22] slab: make percpu sheaves compatible with kmalloc_nolock()/kfree_nolock() Vlastimil Babka
2026-01-23 18:05 ` Alexei Starovoitov
2026-01-27 17:36 ` Liam R. Howlett
2026-01-29 8:25 ` Vlastimil Babka
2026-03-02 11:56 ` D, Suneeth
2026-03-02 12:16 ` Vlastimil Babka
2026-01-23 6:52 ` [PATCH v4 09/22] slab: handle kmalloc sheaves bootstrap Vlastimil Babka
2026-01-27 18:30 ` Liam R. Howlett
2026-01-23 6:52 ` [PATCH v4 10/22] slab: add optimized sheaf refill from partial list Vlastimil Babka
2026-01-26 7:12 ` Hao Li
2026-01-29 7:43 ` Harry Yoo
2026-01-29 8:29 ` Vlastimil Babka
2026-01-27 20:05 ` Liam R. Howlett
2026-01-29 8:01 ` Harry Yoo
2026-01-23 6:52 ` [PATCH v4 11/22] slab: remove cpu (partial) slabs usage from allocation paths Vlastimil Babka
2026-01-23 18:17 ` Alexei Starovoitov
2026-01-23 6:52 ` [PATCH v4 12/22] slab: remove SLUB_CPU_PARTIAL Vlastimil Babka
2026-01-23 6:52 ` [PATCH v4 13/22] slab: remove the do_slab_free() fastpath Vlastimil Babka
2026-01-23 18:15 ` Alexei Starovoitov
2026-01-23 6:52 ` [PATCH v4 14/22] slab: remove defer_deactivate_slab() Vlastimil Babka
2026-01-23 17:31 ` Alexei Starovoitov
2026-01-23 6:52 ` [PATCH v4 15/22] slab: simplify kmalloc_nolock() Vlastimil Babka
2026-01-23 6:52 ` [PATCH v4 16/22] slab: remove struct kmem_cache_cpu Vlastimil Babka
2026-01-23 6:52 ` [PATCH v4 17/22] slab: remove unused PREEMPT_RT specific macros Vlastimil Babka
2026-01-23 6:52 ` [PATCH v4 18/22] slab: refill sheaves from all nodes Vlastimil Babka
2026-01-27 14:28 ` Mateusz Guzik
2026-01-27 22:04 ` Vlastimil Babka
2026-01-29 9:16 ` Harry Yoo
2026-01-23 6:52 ` [PATCH v4 19/22] slab: update overview comments Vlastimil Babka
2026-01-23 6:52 ` [PATCH v4 20/22] slab: remove frozen slab checks from __slab_free() Vlastimil Babka
2026-01-29 7:16 ` Harry Yoo
2026-01-23 6:52 ` [PATCH v4 21/22] mm/slub: remove DEACTIVATE_TO_* stat items Vlastimil Babka
2026-01-29 7:21 ` Harry Yoo
2026-01-23 6:53 ` [PATCH v4 22/22] mm/slub: cleanup and repurpose some " Vlastimil Babka
2026-01-29 7:40 ` Harry Yoo
2026-01-29 15:18 ` [PATCH v4 00/22] slab: replace cpu (partial) slabs with sheaves Hao Li
2026-01-29 15:28 ` Vlastimil Babka
2026-01-29 16:06 ` Hao Li
2026-01-29 16:44 ` Liam R. Howlett
2026-01-30 4:38 ` Hao Li
2026-01-30 4:50 ` Hao Li
2026-01-30 6:17 ` Hao Li
2026-02-04 18:02 ` Vlastimil Babka
2026-02-04 18:24 ` Christoph Lameter (Ampere)
2026-02-06 16:44 ` Vlastimil Babka
2026-03-26 12:43 ` [REGRESSION] " Aishwarya Rambhadran
2026-03-26 14:42 ` Vlastimil Babka (SUSE)
2026-03-26 18:16 ` Uladzislau Rezki
2026-03-26 18:24 ` Vlastimil Babka (SUSE)
2026-03-26 18:50 ` Ryan Roberts
2026-03-27 7:54 ` Vlastimil Babka (SUSE)
2026-03-27 8:58 ` Ryan Roberts
2026-03-27 10:00 ` Harry Yoo (Oracle)
2026-03-27 11:21 ` Vlastimil Babka (SUSE)
2026-03-27 16:24 ` Aishwarya Rambhadran
2026-03-27 3:20 ` Harry Yoo (Oracle)
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