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 B2352C4332F for ; Thu, 24 Nov 2022 01:20:10 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4DB036B0071; Wed, 23 Nov 2022 20:20:10 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 48B306B0072; Wed, 23 Nov 2022 20:20:10 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 37C5E6B0074; Wed, 23 Nov 2022 20:20:10 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 258B36B0071 for ; Wed, 23 Nov 2022 20:20:10 -0500 (EST) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 03BD2408EB for ; Thu, 24 Nov 2022 01:20:09 +0000 (UTC) X-FDA: 80166579780.11.59EA47B Received: from out0.migadu.com (out0.migadu.com [94.23.1.103]) by imf12.hostedemail.com (Postfix) with ESMTP id 5C59640008 for ; Thu, 24 Nov 2022 01:20:09 +0000 (UTC) Date: Wed, 23 Nov 2022 17:20:04 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1669252808; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=kSoIk47rAwpiN9pabAp+IZRqQiebKCqHWLdT35A0A3E=; b=rW0ro0KVSJkzBJO/DFQ3lHOaWqdsvbxFKZ7ndm41ogrFFbp3F0jmavv+qF1GPQ60geBRqE 0h7+J6e++wyQrY1+rfc16vzgYOCQWFwptmgOWsNISroA8jrbnmYRUf6xxD8VBksYpUoIP8 k9Ructq1YdIVopdOMLFVM/g9NxzqI4E= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Roman Gushchin To: Vlastimil Babka Cc: Christoph Lameter , David Rientjes , Joonsoo Kim , Pekka Enberg , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Andrew Morton , Linus Torvalds , Matthew Wilcox , patches@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 07/12] mm, slab: ignore SLAB_RECLAIM_ACCOUNT with CONFIG_SLUB_TINY Message-ID: References: <20221121171202.22080-1-vbabka@suse.cz> <20221121171202.22080-8-vbabka@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221121171202.22080-8-vbabka@suse.cz> X-Migadu-Flow: FLOW_OUT ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1669252809; a=rsa-sha256; cv=none; b=Q/hbU0GsVhVH2aOq6H7z+8K02LAkVWGfzTTXDWQAwQ2eVXqWBsR1DXNI+8W0gTrJ1owQto GsMbta32C0k6pVuxn7UMdm7vumLUyn1Pxu3adDILdxisFZdLI6PKfvpFfGiW3cFDqQymcZ ZprcOMMXKW5y/ICWZQrpneZUzuFwQRo= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=rW0ro0KV; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf12.hostedemail.com: domain of roman.gushchin@linux.dev designates 94.23.1.103 as permitted sender) smtp.mailfrom=roman.gushchin@linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1669252809; 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=kSoIk47rAwpiN9pabAp+IZRqQiebKCqHWLdT35A0A3E=; b=IIbQO1fr/h5jnPEgxluqE9YgJYOmtqSrq6jdhWP5A5yFwmxOOUyS9EZGOjEGSsWFqHyxTL WSQyyT1XH60twV5jaZ7Tljo4ind8jMYIiSiAAg9LAesqcQAd30K8UFu9HGD7giAvuUArV7 rQCR8YnL12HgSO6hfJOOBWa9eHriEAE= X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 5C59640008 X-Rspam-User: Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=rW0ro0KV; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf12.hostedemail.com: domain of roman.gushchin@linux.dev designates 94.23.1.103 as permitted sender) smtp.mailfrom=roman.gushchin@linux.dev X-Stat-Signature: hb4kzeh4fkihz39ojhc6szff7hkd8woo X-HE-Tag: 1669252809-101242 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 06:11:57PM +0100, Vlastimil Babka wrote: > SLAB_RECLAIM_ACCOUNT caches allocate their slab pages with > __GFP_RECLAIMABLE and can help against fragmentation by grouping pages > by mobility, but on tiny systems mobility grouping is likely disabled > anyway and ignoring SLAB_RECLAIM_ACCOUNT might instead lead to merging > of caches that are made incompatible just by the flag. > > Thus with CONFIG_SLUB_TINY, make SLAB_RECLAIM_ACCOUNT ineffective. Hm, do you see disabling all kernel memory accounting functionality with COFNIG_SLUB_TINY? I'd say yes. But in this case need to be consistent and disable it alltogether. Thanks!