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

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To: David Hildenbrand <david@xxxxxxxxxx>
Subject: Re: [PATCH v1] mm/memory_hotplug: don't check the nid in find_(smallest|biggest)_section_pfn
From: Qian Cai <cai@xxxxxx>
Date: Wed, 27 Nov 2019 14:37:09 -0500
Cc: linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxxxx>, Oscar Salvador <osalvador@xxxxxxx>
In-reply-to: <1F8C5EE3-4F07-4B23-9612-25FA265557C5@redhat.com>
References: <1F8C5EE3-4F07-4B23-9612-25FA265557C5@redhat.com>


> On Nov 27, 2019, at 2:06 PM, David Hildenbrand <david@xxxxxxxxxx> 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.

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