From: Hyeonggon Yoo <42.hyeyoo@gmail.com>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Christoph Lameter <cl@linux.com>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Pekka Enberg <penberg@kernel.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Matthew Wilcox <willy@infradead.org>,
patches@lists.linux.dev, Dennis Zhou <dennis@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 10/12] mm, slub: remove percpu slabs with CONFIG_SLUB_TINY
Date: Sun, 27 Nov 2022 20:05:52 +0900 [thread overview]
Message-ID: <Y4NEkF8DI1uXFRv4@hyeyoo> (raw)
In-Reply-To: <20221121171202.22080-11-vbabka@suse.cz>
On Mon, Nov 21, 2022 at 06:12:00PM +0100, Vlastimil Babka wrote:
> SLUB gets most of its scalability by percpu slabs. However for
> CONFIG_SLUB_TINY the goal is minimal memory overhead, not scalability.
> Thus, #ifdef out the whole kmem_cache_cpu percpu structure and
> associated code. Additionally to the slab page savings, this reduces
> percpu allocator usage, and code size.
[+Cc Dennis]
Wondering if we can reduce (or zero) early reservation of percpu area
when #if !defined(CONFIG_SLUB) || defined(CONFIG_SLUB_TINY)?
> This change builds on recent commit c7323a5ad078 ("mm/slub: restrict
> sysfs validation to debug caches and make it safe"), as caches with
> enabled debugging also avoid percpu slabs and all allocations and
> freeing ends up working with the partial list. With a bit more
> refactoring by the preceding patches, use the same code paths with
> CONFIG_SLUB_TINY.
>
> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
--
Thanks,
Hyeonggon
next prev parent reply other threads:[~2022-11-27 11:05 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-21 17:11 [PATCH 00/12] Introduce CONFIG_SLUB_TINY and deprecate SLOB Vlastimil Babka
2022-11-21 17:11 ` [PATCH 01/12] mm, slab: ignore hardened usercopy parameters when disabled Vlastimil Babka
2022-11-21 21:35 ` Kees Cook
2022-11-23 14:23 ` Vlastimil Babka
2022-11-24 11:16 ` Hyeonggon Yoo
2022-11-24 11:26 ` Vlastimil Babka
2022-11-24 12:33 ` Hyeonggon Yoo
2022-11-21 17:11 ` [PATCH 02/12] mm, slub: add CONFIG_SLUB_TINY Vlastimil Babka
2022-11-24 1:08 ` Roman Gushchin
2022-11-24 11:33 ` Hyeonggon Yoo
2022-11-25 7:55 ` Vlastimil Babka
2022-11-21 17:11 ` [PATCH 03/12] mm, slub: disable SYSFS support with CONFIG_SLUB_TINY Vlastimil Babka
2022-11-24 1:12 ` Roman Gushchin
2022-11-24 9:00 ` Vlastimil Babka
2022-11-21 17:11 ` [PATCH 04/12] mm, slub: retain no free slabs on partial list " Vlastimil Babka
2022-11-24 1:12 ` Roman Gushchin
2022-11-24 11:38 ` Hyeonggon Yoo
2022-11-21 17:11 ` [PATCH 05/12] mm, slub: lower the default slub_max_order " Vlastimil Babka
2022-11-24 1:16 ` Roman Gushchin
2022-11-24 11:40 ` Hyeonggon Yoo
2022-11-21 17:11 ` [PATCH 06/12] mm, slub: don't create kmalloc-rcl caches " Vlastimil Babka
2022-11-23 13:53 ` Vlastimil Babka
2022-11-24 12:06 ` Hyeonggon Yoo
2022-11-24 12:12 ` Vlastimil Babka
2022-11-24 12:55 ` Hyeonggon Yoo
2022-11-24 13:23 ` Hyeonggon Yoo
2022-11-24 14:25 ` Hyeonggon Yoo
2022-11-21 17:11 ` [PATCH 07/12] mm, slab: ignore SLAB_RECLAIM_ACCOUNT " Vlastimil Babka
2022-11-24 1:20 ` Roman Gushchin
2022-11-24 9:09 ` Vlastimil Babka
2022-11-24 9:21 ` Christoph Lameter
2022-11-27 23:11 ` Vlastimil Babka
2022-11-21 17:11 ` [PATCH 08/12] mm, slub: refactor free debug processing Vlastimil Babka
2022-11-27 10:18 ` Hyeonggon Yoo
2022-11-21 17:11 ` [PATCH 09/12] mm, slub: split out allocations from pre/post hooks Vlastimil Babka
2022-11-27 10:54 ` Hyeonggon Yoo
2022-11-27 23:01 ` Vlastimil Babka
2022-11-28 13:06 ` Hyeonggon Yoo
2022-11-21 17:12 ` [PATCH 10/12] mm, slub: remove percpu slabs with CONFIG_SLUB_TINY Vlastimil Babka
2022-11-27 11:05 ` Hyeonggon Yoo [this message]
2022-12-12 10:54 ` Vlastimil Babka
2022-12-12 13:11 ` Dennis Zhou
2022-12-13 3:04 ` Baoquan He
2022-12-13 14:02 ` Hyeonggon Yoo
2022-12-18 10:16 ` Hyeonggon Yoo
2022-11-21 17:12 ` [PATCH 11/12] mm, slub: don't aggressively inline " Vlastimil Babka
2022-11-28 13:19 ` Hyeonggon Yoo
2022-11-21 17:12 ` [PATCH 12/12] mm, slob: rename CONFIG_SLOB to CONFIG_SLOB_DEPRECATED Vlastimil Babka
2022-11-21 18:41 ` Aaro Koskinen
2022-11-21 19:42 ` Vlastimil Babka
2022-11-22 6:47 ` Damien Le Moal
2022-11-22 16:08 ` Arnd Bergmann
2022-11-24 1:21 ` Roman Gushchin
2022-12-02 17:59 ` Palmer Dabbelt
2022-12-05 12:25 ` Damien Le Moal
2022-12-13 13:41 ` Hyeonggon Yoo
2022-11-22 16:33 ` [PATCH 00/12] Introduce CONFIG_SLUB_TINY and deprecate SLOB Arnd Bergmann
2022-11-22 16:59 ` Vlastimil Babka
2022-11-22 17:15 ` Arnd Bergmann
2022-11-24 20:30 ` Mike Rapoport
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