From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-f71.google.com (mail-ed1-f71.google.com [209.85.208.71]) by kanga.kvack.org (Postfix) with ESMTP id 1F0956B0003 for ; Sun, 21 Oct 2018 08:12:58 -0400 (EDT) Received: by mail-ed1-f71.google.com with SMTP id l51-v6so23032507edc.14 for ; Sun, 21 Oct 2018 05:12:58 -0700 (PDT) Received: from outbound-smtp13.blacknight.com (outbound-smtp13.blacknight.com. [46.22.139.230]) by mx.google.com with ESMTPS id g27-v6si11746822edj.72.2018.10.21.05.12.56 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 21 Oct 2018 05:12:56 -0700 (PDT) Received: from mail.blacknight.com (unknown [81.17.254.11]) by outbound-smtp13.blacknight.com (Postfix) with ESMTPS id 34E4B1C2445 for ; Sun, 21 Oct 2018 13:12:56 +0100 (IST) Date: Sun, 21 Oct 2018 13:12:51 +0100 From: Mel Gorman Subject: Re: [RFC] put page to pcp->lists[] tail if it is not on the same node Message-ID: <20181021121251.GA8041@techsingularity.net> References: <20181019043303.s5axhjfb2v2lzsr3@master> <20181019083818.GQ5819@techsingularity.net> <20181020163318.72oqszgdtqfafycu@master> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20181020163318.72oqszgdtqfafycu@master> Sender: owner-linux-mm@kvack.org List-ID: To: Wei Yang Cc: willy@infradead.org, mhocko@suse.com, linux-mm@kvack.org, akpm@linux-foundation.org On Sat, Oct 20, 2018 at 04:33:18PM +0000, Wei Yang wrote: > >Pages from remote nodes are not placed on local lists. Even in the slab > >context, such objects are placed on alien caches which have special > >handling. > > > > Hmm... I am not sure get your point correctly. > The point is that one list should not contain a mix of pages belonging to different nodes or zones or it'll result in unexpected behaviour. If you are just shuffling the ordering of pages in the list, it needs justification as to why that makes sense. -- Mel Gorman SUSE Labs