linux-kernel - Re: [v2 RFC PATCH 0/9] Another Approach to Use PMEM as NUMA Node

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Message-ID: <20190418090227.GG6567@dhcp22.suse.cz>
Date:   Thu, 18 Apr 2019 11:02:27 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Yang Shi <yang.shi@...ux.alibaba.com>
Cc:     mgorman@...hsingularity.net, riel@...riel.com, hannes@...xchg.org,
        akpm@...ux-foundation.org, dave.hansen@...el.com,
        keith.busch@...el.com, dan.j.williams@...el.com,
        fengguang.wu@...el.com, fan.du@...el.com, ying.huang@...el.com,
        ziy@...dia.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [v2 RFC PATCH 0/9] Another Approach to Use PMEM as NUMA Node

On Wed 17-04-19 13:43:44, Yang Shi wrote:
[...]
> And, I'm wondering whether this optimization is also suitable to general
> NUMA balancing or not.

If there are convincing numbers then this should be a preferable way to
deal with it. Please note that the number of promotions is not the only
metric to watch. The overal performance/access latency would be another one.

-- 
Michal Hocko
SUSE Labs