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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id E2D4CC4321E for ; Thu, 24 Nov 2022 20:31:07 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0A9B86B0071; Thu, 24 Nov 2022 15:31:07 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 05A636B0072; Thu, 24 Nov 2022 15:31:07 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E64E66B0073; Thu, 24 Nov 2022 15:31:06 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id D6E056B0071 for ; Thu, 24 Nov 2022 15:31:06 -0500 (EST) Received: from smtpin02.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 96F6A803C7 for ; Thu, 24 Nov 2022 20:31:06 +0000 (UTC) X-FDA: 80169480132.02.6D8C5E3 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf25.hostedemail.com (Postfix) with ESMTP id 00F7EA0013 for ; Thu, 24 Nov 2022 20:31:04 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 40E4DB828DB; Thu, 24 Nov 2022 20:31:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9BB9BC433D6; Thu, 24 Nov 2022 20:30:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669321862; bh=VYogHO/QzC0Ie7JtQNRyLU+4odaED0lO+ZqrQ2anQ4g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=B4JIUPPb4GNyqmaugd+1VesUVg/rY2YBuh9jPZSEa9LfSEQzH3zDygt0HPqdzet2M Dp4c/55O2yCFMpzlwelwJsAnq/cWVHvGVHOAbVO908xeu84LN7567KgsRaE4IVVlI4 irQCMsnXsSJ21jNJaw6RWjzOUpRxJ6RKhWjRfpd9wRYv71gwQVQAvT0UvpbAXv+eDr jBzcX+3BhUu0qt/DvQCSNER8QfDrEQGt+TJ9slcZjWNwkaVshc7is4iQ3Zq0vSzdZc hcrepLOFcnDEx3g9ybGBdkV9QmYuTZxJxy7F+stexs8bO96+DDGYQXJXkj+qDrkXGn djLsL9V97W7iw== Date: Thu, 24 Nov 2022 22:30:41 +0200 From: Mike Rapoport To: Vlastimil Babka Cc: Christoph Lameter , David Rientjes , Joonsoo Kim , Pekka Enberg , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Roman Gushchin , Andrew Morton , Linus Torvalds , Matthew Wilcox , patches@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Aaro Koskinen , Arnd Bergmann , Christophe Leroy , Conor Dooley , Damien Le Moal , Geert Uytterhoeven , Janusz Krzysztofik , Jonas Bonn , Josh Triplett , Kees Cook , linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, openrisc@lists.librecores.org, Rich Felker , Russell King , Stafford Horne , Stefan Kristiansson , Tony Lindgren , Yoshinori Sato Subject: Re: [PATCH 00/12] Introduce CONFIG_SLUB_TINY and deprecate SLOB Message-ID: References: <20221121171202.22080-1-vbabka@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221121171202.22080-1-vbabka@suse.cz> ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1669321865; a=rsa-sha256; cv=none; b=StVj68OZd7kl5jj9LxAMKwhgEqU4WxQwqIixltGqJ6MxTpOw4LO3D3143fRo3QImEhCJ94 rrV/G13y2ubiIOdNdESuGC6I3/o0zlWpaUo1ZYott1MHik5QMsbijgfBXy8qG5kI16Vp4Z ka184xe6vbZ+/r1V+aXiGvWGwkgaQC0= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=B4JIUPPb; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf25.hostedemail.com: domain of rppt@kernel.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=rppt@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1669321865; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=m6NvtBlQLFcfuEJBiSs5MlNJN9GblBxZlPCBXRgO4ds=; b=rQc5EyWV9jczjRV8WCby7RDfg1/SEuFF0Jbr2haJtMAf9GwrU4f7zOIvxJlaDdCgcX4YUr ZMv0CNc6SsRR1mWkDXRGNOJ+qG7ycJ7hvF/wOVjXGhajYTrcqBLt1HuLRjmlZkXRYVP1UE h6toG9HBwtArvOuNJIkROiiSzl3K7ew= X-Rspamd-Queue-Id: 00F7EA0013 X-Stat-Signature: 91zzwzc7zdzbzsn4fejqkq9866ddjgor X-Rspam-User: Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=B4JIUPPb; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf25.hostedemail.com: domain of rppt@kernel.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=rppt@kernel.org X-Rspamd-Server: rspam09 X-HE-Tag: 1669321864-679511 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, Nov 21, 2022 at 06:11:50PM +0100, Vlastimil Babka wrote: > Hi, > > this continues the discussion from [1]. Reasons to remove SLOB are > outlined there and no-one has objected so far. The last patch of this > series therefore deprecates CONFIG_SLOB and updates all the defconfigs > using CONFIG_SLOB=y in the tree. > > There is a k210 board with 8MB RAM where switching to SLUB caused issues > [2] and the lkp bot wasn't also happy about code bloat [3]. To address > both, this series introduces CONFIG_SLUB_TINY to perform some rather > low-hanging fruit modifications to SLUB to reduce its memory overhead. > This seems to have been successful at least in the k210 case [4]. I > consider this as an acceptable tradeoff for getting rid of SLOB. > > The series is also available in git: > https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git/log/?h=slub-tiny-v1r2 > > [1] https://lore.kernel.org/all/b35c3f82-f67b-2103-7d82-7a7ba7521439@suse.cz/ > [2] https://lore.kernel.org/all/a5bba3ca-da19-293c-c01b-a28291533466@opensource.wdc.com/ > [3] https://lore.kernel.org/all/Y25E9cJbhDAKi1vd@99bb1221be19/ > [4] https://lore.kernel.org/all/6a1883c4-4c3f-545a-90e8-2cd805bcf4ae@opensource.wdc.com/ > > Vlastimil Babka (12): > mm, slab: ignore hardened usercopy parameters when disabled > mm, slub: add CONFIG_SLUB_TINY > mm, slub: disable SYSFS support with CONFIG_SLUB_TINY > mm, slub: retain no free slabs on partial list with CONFIG_SLUB_TINY > mm, slub: lower the default slub_max_order with CONFIG_SLUB_TINY > mm, slub: don't create kmalloc-rcl caches with CONFIG_SLUB_TINY > mm, slab: ignore SLAB_RECLAIM_ACCOUNT with CONFIG_SLUB_TINY > mm, slub: refactor free debug processing > mm, slub: split out allocations from pre/post hooks > mm, slub: remove percpu slabs with CONFIG_SLUB_TINY > mm, slub: don't aggressively inline with CONFIG_SLUB_TINY > mm, slob: rename CONFIG_SLOB to CONFIG_SLOB_DEPRECATED > > arch/arm/configs/clps711x_defconfig | 3 +- > arch/arm/configs/collie_defconfig | 3 +- > arch/arm/configs/multi_v4t_defconfig | 3 +- > arch/arm/configs/omap1_defconfig | 3 +- > arch/arm/configs/pxa_defconfig | 3 +- > arch/arm/configs/tct_hammer_defconfig | 3 +- > arch/arm/configs/xcep_defconfig | 3 +- > arch/openrisc/configs/or1ksim_defconfig | 3 +- > arch/openrisc/configs/simple_smp_defconfig | 3 +- > arch/riscv/configs/nommu_k210_defconfig | 3 +- > .../riscv/configs/nommu_k210_sdcard_defconfig | 3 +- > arch/riscv/configs/nommu_virt_defconfig | 3 +- > arch/sh/configs/rsk7201_defconfig | 3 +- > arch/sh/configs/rsk7203_defconfig | 3 +- > arch/sh/configs/se7206_defconfig | 3 +- > arch/sh/configs/shmin_defconfig | 3 +- > arch/sh/configs/shx3_defconfig | 3 +- > include/linux/slab.h | 8 + > include/linux/slub_def.h | 6 +- > kernel/configs/tiny.config | 5 +- > mm/Kconfig | 38 +- > mm/Kconfig.debug | 2 +- > mm/slab_common.c | 16 +- > mm/slub.c | 415 ++++++++++++------ > 24 files changed, 377 insertions(+), 164 deletions(-) For the series Acked-by: Mike Rapoport -- Sincerely yours, Mike.