From: Vlastimil Babka <vbabka@suse.cz>
To: 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>
Cc: 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,
kernel test robot <oliver.sang@intel.com>,
stable@vger.kernel.org
Subject: Re: [PATCH RFC v2 00/20] slab: replace cpu (partial) slabs with sheaves
Date: Thu, 15 Jan 2026 16:12:07 +0100 [thread overview]
Message-ID: <8c508b65-3b80-4b91-afa0-145b44686b6a@suse.cz> (raw)
In-Reply-To: <20260112-sheaves-for-all-v2-0-98225cfb50cf@suse.cz>
On 1/12/26 16:16, Vlastimil Babka wrote:
> Percpu sheaves caching was introduced as opt-in but the goal was to
> eventually move all caches to them. This is the next step, enabling
> sheaves for all caches (except the two bootstrap ones) and then removing
> the per cpu (partial) slabs and lots of associated code.
>
> Besides (hopefully) improved performance, this removes the rather
> complicated code related to the lockless fastpaths (using
> this_cpu_try_cmpxchg128/64) and its complications with PREEMPT_RT or
> kmalloc_nolock().
>
> The lockless slab freelist+counters update operation using
> try_cmpxchg128/64 remains and is crucial for freeing remote NUMA objects
> without repeating the "alien" array flushing of SLUB, and to allow
> flushing objects from sheaves to slabs mostly without the node
> list_lock.
>
> This v2 is the first non-RFC. I would consider exposing the series to
> linux-next at this point.
>
> Git branch for the v2:
> https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git/log/?h=sheaves-for-all-v2
The current state with collected fixes:
https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git/log/?h=b4/sheaves-for-all
prev parent reply other threads:[~2026-01-15 15:12 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-12 15:16 Vlastimil Babka
2026-01-12 15:16 ` [PATCH RFC v2 01/20] mm/slab: add rcu_barrier() to kvfree_rcu_barrier_on_cache() Vlastimil Babka
2026-01-13 2:08 ` Harry Yoo
2026-01-13 9:32 ` Vlastimil Babka
2026-01-13 12:31 ` Harry Yoo
2026-01-13 13:09 ` Vlastimil Babka
2026-01-14 11:14 ` Harry Yoo
2026-01-14 13:02 ` Vlastimil Babka
2026-01-15 23:52 ` Suren Baghdasaryan
2026-01-14 4:56 ` Harry Yoo
2026-01-12 15:16 ` [PATCH RFC v2 02/20] mm/slab: move and refactor __kmem_cache_alias() Vlastimil Babka
2026-01-13 7:06 ` Harry Yoo
2026-01-16 0:06 ` Suren Baghdasaryan
2026-01-12 15:16 ` [PATCH RFC v2 03/20] mm/slab: make caches with sheaves mergeable Vlastimil Babka
2026-01-13 7:47 ` Harry Yoo
2026-01-16 0:22 ` Suren Baghdasaryan
2026-01-16 7:24 ` Vlastimil Babka
2026-01-16 8:46 ` Harry Yoo
2026-01-16 11:01 ` Vlastimil Babka
2026-01-16 11:10 ` Harry Yoo
2026-01-16 16:58 ` Suren Baghdasaryan
2026-01-12 15:16 ` [PATCH RFC v2 04/20] slab: add sheaves to most caches Vlastimil Babka
2026-01-16 5:45 ` Suren Baghdasaryan
2026-01-16 11:24 ` Vlastimil Babka
2026-01-16 16:59 ` Suren Baghdasaryan
2026-01-16 6:46 ` Harry Yoo
2026-01-12 15:16 ` [PATCH RFC v2 05/20] slab: introduce percpu sheaves bootstrap Vlastimil Babka
2026-01-13 12:49 ` Hao Li
2026-01-15 10:11 ` Vlastimil Babka
2026-01-16 7:29 ` Harry Yoo
2026-01-12 15:17 ` [PATCH RFC v2 06/20] slab: make percpu sheaves compatible with kmalloc_nolock()/kfree_nolock() Vlastimil Babka
2026-01-13 15:42 ` Hao Li
2026-01-15 11:07 ` Vlastimil Babka
2026-01-13 18:36 ` Sebastian Andrzej Siewior
2026-01-13 23:26 ` Alexei Starovoitov
2026-01-14 13:57 ` Vlastimil Babka
2026-01-14 14:05 ` Vlastimil Babka
2026-01-14 15:07 ` Sebastian Andrzej Siewior
2026-01-12 15:17 ` [PATCH RFC v2 07/20] slab: handle kmalloc sheaves bootstrap Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 08/20] slab: add optimized sheaf refill from partial list Vlastimil Babka
2026-01-15 14:25 ` Vlastimil Babka
2026-01-16 6:27 ` Hao Li
2026-01-16 7:32 ` Vlastimil Babka
2026-01-16 7:56 ` Hao Li
2026-01-12 15:17 ` [PATCH RFC v2 09/20] slab: remove cpu (partial) slabs usage from allocation paths Vlastimil Babka
2026-01-14 6:07 ` Hao Li
2026-01-15 13:53 ` Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 10/20] slab: remove SLUB_CPU_PARTIAL Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 11/20] slab: remove the do_slab_free() fastpath Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 12/20] slab: remove defer_deactivate_slab() Vlastimil Babka
2026-01-15 14:09 ` Hao Li
2026-01-15 14:47 ` Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 13/20] slab: simplify kmalloc_nolock() Vlastimil Babka
2026-01-14 3:31 ` Alexei Starovoitov
2026-01-12 15:17 ` [PATCH RFC v2 14/20] slab: remove struct kmem_cache_cpu Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 15/20] slab: remove unused PREEMPT_RT specific macros Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 16/20] slab: refill sheaves from all nodes Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 17/20] slab: update overview comments Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 18/20] slab: remove frozen slab checks from __slab_free() Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 19/20] mm/slub: remove DEACTIVATE_TO_* stat items Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 20/20] mm/slub: cleanup and repurpose some " Vlastimil Babka
2026-01-12 15:20 ` [PATCH v2 00/20] slab: replace cpu (partial) slabs with sheaves Vlastimil Babka
2026-01-15 15:12 ` Vlastimil Babka [this message]
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