linux-kernel - Re: [PATCH 2/6] mm: handle uninitialized numa nodes gracefully

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Date:   Thu, 3 Feb 2022 10:19:48 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     David Hildenbrand <david@...hat.com>,
        Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Wei Yang <richard.weiyang@...il.com>, linux-mm@...ck.org,
        LKML <linux-kernel@...r.kernel.org>,
        Alexey Makhalov <amakhalov@...are.com>,
        Dennis Zhou <dennis@...nel.org>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Oscar Salvador <osalvador@...e.de>, Tejun Heo <tj@...nel.org>,
        Christoph Lameter <cl@...ux.com>,
        Nico Pache <npache@...hat.com>,
        Rafael Aquini <raquini@...hat.com>
Subject: Re: [PATCH 2/6] mm: handle uninitialized numa nodes gracefully

So we will go with the following.
/*
 * We do not want to confuse userspace by sysfs files/directories for node
 * without any memory attached to it, so this node is not marked as
 * N_MEMORY and not marked online so that no sysfs hierarchy will be
 * created via register_one_node for this node. The pgdat will get fully
 * initialized by hotadd_init_pgdat() when memory is hotpluged into this
 * node
 */

OK?
-- 
Michal Hocko
SUSE Labs