From: David Laight <David.Laight@ACULAB.COM>
To: 'Vlastimil Babka' <vbabka@suse.cz>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"patches@lists.linux.dev" <patches@lists.linux.dev>
Subject: RE: [PATCH] mm: remove all the slab allocators
Date: Sat, 1 Apr 2023 18:33:28 +0000 [thread overview]
Message-ID: <eea7e17ab4264b7ca7ccea0ab725120f@AcuMS.aculab.com> (raw)
In-Reply-To: <20230401094658.11146-1-vbabka@suse.cz>
From: Vlastimil Babka
> Sent: 32 March 2023 10:47
>
> As the SLOB removal is on track and the SLAB removal is planned, I have
> realized - why should we stop there and not remove also SLUB? What's a
> slab allocator good for in 2023? The RAM sizes are getting larger and
> the modules cheaper [1]. The object constructor trick was perhaps
> interesting in 1994, but not with contemporary CPUs. So all the slab
> allocator does today is just adding an unnecessary layer of complexity
> over the page allocator.
Why stop there?
Remove kmalloc() completely.
With cheap memory isn't unreasonable to go back to compile-time
settable fixed size arrays for all items.
Should make 'use after free' much easier to track down.
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
next prev parent reply other threads:[~2023-04-01 18:33 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-01 9:46 Vlastimil Babka
2023-04-01 10:00 ` Lorenzo Stoakes
2023-04-01 10:25 ` Yosry Ahmed
2023-04-01 11:33 ` Petr Tesařík
2023-04-01 11:38 ` Vlastimil Babka
2023-04-01 15:15 ` Matthew Wilcox
2023-04-01 18:33 ` David Laight [this message]
2023-04-01 18:45 ` Christophe Leroy
2023-04-01 22:04 ` David Laight
2023-04-02 5:09 ` Jeff Xie
2023-04-02 9:09 ` 郭辉
2023-04-02 11:04 ` Matthew Wilcox
2023-04-03 3:51 ` Fabio M. De Francesco
2023-04-03 4:04 ` Fabio M. De Francesco
2023-04-03 4:13 ` Matthew Wilcox
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