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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39B23C433EF for ; Thu, 28 Oct 2021 12:10:02 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DCCE2610CA for ; Thu, 28 Oct 2021 12:10:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org DCCE2610CA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 5F8EF6B0071; Thu, 28 Oct 2021 08:10:01 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5A8AE6B0072; Thu, 28 Oct 2021 08:10:01 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4988F940007; Thu, 28 Oct 2021 08:10:01 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0079.hostedemail.com [216.40.44.79]) by kanga.kvack.org (Postfix) with ESMTP id 1DD266B0071 for ; Thu, 28 Oct 2021 08:10:01 -0400 (EDT) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 9D5192DD96 for ; Thu, 28 Oct 2021 12:10:00 +0000 (UTC) X-FDA: 78745727760.24.BE4B141 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf15.hostedemail.com (Postfix) with ESMTP id 1F7D6D0004AA for ; Thu, 28 Oct 2021 12:09:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=HnIPIz1Bo0Ynwn+sYrbhv3my97lwh0tcbKiXs+mpWtw=; b=R6oXosoLei0qPmZX+wQloT1fva deIL4kIjiMx9dwFPJt12fB28g7tvBxefRpn4EAFPJ5Yt+bmq40Qc72vx3EiX4d5ZVD+cmZsSxGaME JrTSFYs/15BDjQlB54nz+ajt/Se0czGD6UNKuu7JeMMvPb2osCzy9CqpwIE6BuH4UcR42DDvVWtDY VD3zINwLdbFS54x9EMBht0PfPfGCV2uLFUXHtPxf35WcUWL+KMtDtlaJs3xBHEDfj/pxaHJqWvHUW L2C4BY/xrP5tSmpKdC1hiFdtR4Cz882C4axWLHDvpwCuAOSxKPioa8swA9vbxuD/AEXH/IrqtoV6d JmXsDFaQ==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mg4CQ-000kha-PT; Thu, 28 Oct 2021 12:08:19 +0000 Date: Thu, 28 Oct 2021 13:08:02 +0100 From: Matthew Wilcox To: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Christoph Lameter , Linux Memory Management List , LKML , Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , Vlastimil Babka Subject: Re: Do we really need SLOB nowdays? Message-ID: References: <20211017042852.GA3050@kvm.asia-northeast3-a.c.our-ratio-313919.internal> <20211017133618.GA7989@kvm.asia-northeast3-a.c.our-ratio-313919.internal> <20211017135708.GA8442@kvm.asia-northeast3-a.c.our-ratio-313919.internal> <20211028100414.GA2928@kvm.asia-northeast3-a.c.our-ratio-313919.internal> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211028100414.GA2928@kvm.asia-northeast3-a.c.our-ratio-313919.internal> X-Stat-Signature: 5s9gkbdwbcoggy3zg17x161mseei14t9 X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 1F7D6D0004AA Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=R6oXosoL; dmarc=none; spf=none (imf15.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org X-HE-Tag: 1635422992-131162 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 Thu, Oct 28, 2021 at 10:04:14AM +0000, Hyeonggon Yoo wrote: > On Mon, Oct 25, 2021 at 10:17:08AM +0200, Christoph Lameter wrote: > > On Mon, 18 Oct 2021, Hyeonggon Yoo wrote: > > > > > > Better for what use case? SLOB is for machines with 1-16MB of RAM. > > > > > > > > > > 1~16M is smaller than I thought. Hmm... I'm going to see how it works on > > > tiny configuration. Thank you Matthew! > > > > Is there any reference where we can see such a configuration? Sure it does > > not work with SLUB too? > > I thought why Matthew said "SLOB is for machines with 1-16MB of RAM" > is because if memory is so low, then it is sensitive to memory usage. > > (But I still have doubt if we can run linux on machines like that.) I sent you a series of articles about making Linux run in 1MB.