From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CACD4C76196 for ; Sun, 2 Apr 2023 11:04:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230410AbjDBLE2 (ORCPT ); Sun, 2 Apr 2023 07:04:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33728 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230053AbjDBLE0 (ORCPT ); Sun, 2 Apr 2023 07:04:26 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 87B871B367 for ; Sun, 2 Apr 2023 04:04:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description; bh=ejIxfkJdvGi4VhuEM+uIPq/ME4Gwyhn3SUJxOyVKLaA=; b=jvoSyuRl6lHbAAAK+auNjlOwCA DRVle1xLadbl+WdFHAhI4Sq/CeDhKGMUHxFeHUHvjTzZImykgjTP1/mgFKSjBUVklaLoQ8DYrmerI Z23x4AVbIWmM8mSO6xI7ngse8vvtwxYOici2o6elhSdP5+kIJSl1wetqhNjn14HYyC3Kh/Ngjogs1 EOHjN4Z+wsx0p6Eg6GUjCuMxGGPPdca8RZqQW/55aNmnhL4wzsiLDYlGy9QTi/7bxsc32tLIP0Oud 0q0ai9+N7lyX54wZgJAVtFPRSyQUPXVaoBFMWDa0zMENu5PjsnEEbBrNurpFlPJhDdZHHIVBXf9jh PmLlRN6A==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pivVK-00DDBb-El; Sun, 02 Apr 2023 11:04:10 +0000 Date: Sun, 2 Apr 2023 12:04:10 +0100 From: Matthew Wilcox To: =?utf-8?B?6YOt6L6J?= Cc: Vlastimil Babka , linux-mm@kvack.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev Subject: Re: [PATCH] mm: remove all the slab allocators Message-ID: References: <20230401094658.11146-1-vbabka@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Apr 02, 2023 at 05:09:14PM +0800, 郭辉 wrote: > On 4/1/23 5:46 PM, Vlastimil Babka wrote: > > 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. > > The slab allocator is very core and very important to the Linux kernel. > After the patch is merged into the mainline, it will have a very profound > impact on the development of the Linux kernel. https://en.wikipedia.org/wiki/April_Fools%27_Day