From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Rapoport Subject: Re: DISCONTIGMEM is deprecated Date: Sun, 21 Apr 2019 09:38:59 +0300 Message-ID: <20190421063859.GA19926@rapoport-lnx> References: <20190419094335.GJ18914@techsingularity.net> <20190419140521.GI7751@bombadil.infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20190419140521.GI7751@bombadil.infradead.org> Sender: linux-kernel-owner@vger.kernel.org To: Matthew Wilcox Cc: Mel Gorman , Andrew Morton , Mikulas Patocka , James Bottomley , linux-parisc@vger.kernel.org, linux-mm@kvack.org, Vlastimil Babka , LKML , linux-arch@vger.kernel.org List-Id: linux-arch.vger.kernel.org On Fri, Apr 19, 2019 at 07:05:21AM -0700, Matthew Wilcox wrote: > 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) i386 NUMA as well > I'm not sure that these architecture maintainers even know that DISCONTIGMEM > is deprecated. Adding linux-arch to the cc. > -- Sincerely yours, Mike. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:40824 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725940AbfDUGjJ (ORCPT ); Sun, 21 Apr 2019 02:39:09 -0400 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x3L6XWxe132198 for ; Sun, 21 Apr 2019 02:39:08 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0a-001b2d01.pphosted.com with ESMTP id 2s0ggvv4vs-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sun, 21 Apr 2019 02:39:08 -0400 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Sun, 21 Apr 2019 07:39:06 +0100 Date: Sun, 21 Apr 2019 09:38:59 +0300 From: Mike Rapoport Subject: Re: DISCONTIGMEM is deprecated References: <20190419094335.GJ18914@techsingularity.net> <20190419140521.GI7751@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190419140521.GI7751@bombadil.infradead.org> Message-ID: <20190421063859.GA19926@rapoport-lnx> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Matthew Wilcox Cc: Mel Gorman , Andrew Morton , Mikulas Patocka , James Bottomley , linux-parisc@vger.kernel.org, linux-mm@kvack.org, Vlastimil Babka , LKML , linux-arch@vger.kernel.org Message-ID: <20190421063859.RrhQP176gjy7R7y6eXYQqyNsYLTVi-YmIOCgoderMfk@z> On Fri, Apr 19, 2019 at 07:05:21AM -0700, Matthew Wilcox wrote: > 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) i386 NUMA as well > I'm not sure that these architecture maintainers even know that DISCONTIGMEM > is deprecated. Adding linux-arch to the cc. > -- Sincerely yours, Mike.