From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Received: from mail-ed1-f71.google.com (mail-ed1-f71.google.com [209.85.208.71])
	by kanga.kvack.org (Postfix) with ESMTP id DC94F8E0038
	for <linux-mm@kvack.org>; Tue,  8 Jan 2019 09:52:58 -0500 (EST)
Received: by mail-ed1-f71.google.com with SMTP id o21so1728195edq.4
        for <linux-mm@kvack.org>; Tue, 08 Jan 2019 06:52:58 -0800 (PST)
Received: from mx1.suse.de (mx2.suse.de. [195.135.220.15])
        by mx.google.com with ESMTPS id k3si30710edr.290.2019.01.08.06.52.57
        for <linux-mm@kvack.org>
        (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
        Tue, 08 Jan 2019 06:52:57 -0800 (PST)
Date: Tue, 8 Jan 2019 15:52:56 +0100
From: Michal Hocko <mhocko@kernel.org>
Subject: Re: [RFC][PATCH v2 00/21] PMEM NUMA node and hotness
 accounting/migration
Message-ID: <20190108145256.GX31793@dhcp22.suse.cz>
References: <20181226131446.330864849@intel.com>
 <20181227203158.GO16738@dhcp22.suse.cz>
 <20181228050806.ewpxtwo3fpw7h3lq@wfg-t540p.sh.intel.com>
 <20181228084105.GQ16738@dhcp22.suse.cz>
 <20181228094208.7lgxhha34zpqu4db@wfg-t540p.sh.intel.com>
 <20181228121515.GS16738@dhcp22.suse.cz>
 <20181228133111.zromvopkfcg3m5oy@wfg-t540p.sh.intel.com>
 <20181228195224.GY16738@dhcp22.suse.cz>
 <20190102122110.00000206@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20190102122110.00000206@huawei.com>
Sender: owner-linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>
To: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>, Andrew Morton <akpm@linux-foundation.org>, Linux Memory Management List <linux-mm@kvack.org>, kvm@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>, Fan Du <fan.du@intel.com>, Yao Yuan <yuan.yao@intel.com>, Peng Dong <dongx.peng@intel.com>, Huang Ying <ying.huang@intel.com>, Liu Jingqi <jingqi.liu@intel.com>, Dong Eddie <eddie.dong@intel.com>, Dave Hansen <dave.hansen@intel.com>, Zhang Yi <yi.z.zhang@linux.intel.com>, Dan Williams <dan.j.williams@intel.com>, Mel Gorman <mgorman@suse.de>, Andrea Arcangeli <aarcange@redhat.com>, linux-accelerators@lists.ozlabs.org

On Wed 02-01-19 12:21:10, Jonathan Cameron wrote:
[...]
> So ideally I'd love this set to head in a direction that helps me tick off
> at least some of the above usecases and hopefully have some visibility on
> how to address the others moving forwards,

Is it sufficient to have such a memory marked as movable (aka only have
ZONE_MOVABLE)? That should rule out most of the kernel allocations and
it fits the "balance by migration" concept.
-- 
Michal Hocko
SUSE Labs