linux-kernel - Re: [PATCH v1] mm/memory_hotplug: don't check the nid in find_(smallest|biggest)_section

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Message-Id: <CE5C4BD6-FAA6-4439-B869-679D24C17298@lca.pw>
Date:   Wed, 27 Nov 2019 14:37:09 -0500
From:   Qian Cai <cai@....pw>
To:     David Hildenbrand <david@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>,
        Oscar Salvador <osalvador@...e.de>
Subject: Re: [PATCH v1] mm/memory_hotplug: don't check the nid in find_(smallest|biggest)_section_pfn



> On Nov 27, 2019, at 2:06 PM, David Hildenbrand <david@...hat.com> wrote:
> 
> The zone pointer is unique for every node. (in contrast to the zone index).

I am not sure if it is worth optimizing there. The existing nid check looks quite straight-forward and cheap.