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 X-Spam-Level: X-Spam-Status: No, score=-1.2 required=3.0 tests=DATE_IN_PAST_06_12, DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35040C282E0 for ; Fri, 19 Apr 2019 22:54:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EE563217F9 for ; Fri, 19 Apr 2019 22:54:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="jTOIGU81" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726234AbfDSWyW (ORCPT ); Fri, 19 Apr 2019 18:54:22 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:49702 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726000AbfDSWyW (ORCPT ); Fri, 19 Apr 2019 18:54:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=8GHfViN1qI7tP5bjrRTuauCJlfPJIop88X8YcwvDN6s=; b=jTOIGU81UGM+SZeugfFRNRueG l6N+dMe5L8tE+LsbrB8ff0RI23zdhq6sMGzaJL9CqIcSoEsKeE+4mKtV6w04nWSC7qRYvmWsX4qVv Em6ez34lCyAWPmoo4haiEBl4pAP0PH4JLNkC+J77nltznW7JRNaHYaUvM5IoJDhTTIt9fWrjgAVWX Is1aHcSYYpXbYDLQcz5qHAlAfHu6Ej/IcDznFo6/qIoVShfVOmTYM2vgrmAG/mFYR9pCVl8JRV8eu HeKPmAjiFhTEbg9PgKdqcVA72Lz8X+M7ZlBEd2a/rQHpy56woJi6su9wdmYLTprp8Drt48ag2WAIl /o7GbTcpA==; Received: from willy by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1hHU8n-0006OX-Cm; Fri, 19 Apr 2019 14:05:21 +0000 Date: Fri, 19 Apr 2019 07:05:21 -0700 From: Matthew Wilcox To: Mel Gorman Cc: Andrew Morton , Mikulas Patocka , James Bottomley , linux-parisc@vger.kernel.org, linux-mm@kvack.org, Vlastimil Babka , LKML , linux-arch@vger.kernel.org Subject: DISCONTIGMEM is deprecated Message-ID: <20190419140521.GI7751@bombadil.infradead.org> References: <20190419094335.GJ18914@techsingularity.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190419094335.GJ18914@techsingularity.net> User-Agent: Mutt/1.9.2 (2017-12-15) Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org On Fri, Apr 19, 2019 at 10:43:35AM +0100, Mel Gorman wrote: > DISCONTIG is essentially deprecated and even parisc plans to move to > SPARSEMEM so there is no need to be fancy, this patch simply disables > watermark boosting by default on DISCONTIGMEM. I don't think parisc is the only arch which uses DISCONTIGMEM for !NUMA scenarios. Grepping the arch/ directories shows: alpha (does support NUMA, but also non-NUMA DISCONTIGMEM) arc (for supporting more than 1GB of memory) ia64 (looks complicated ...) m68k (for multiple chunks of memory) mips (does support NUMA but also non-NUMA) parisc (both NUMA and non-NUMA) I'm not sure that these architecture maintainers even know that DISCONTIGMEM is deprecated. Adding linux-arch to the cc.