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Date:   Tue, 7 May 2019 17:30:15 -0700
From:   Dan Williams <>
To:     David Hildenbrand <>
Cc:     Linux MM <>,
        Linux Kernel Mailing List <>,,
        linuxppc-dev <>,
        linux-s390 <>,
        Linux-sh <>,
        Andrew Morton <>
Subject: Re: [PATCH v2 8/8] mm/memory_hotplug: Remove "zone" parameter from sparse_remove_one_section

On Tue, May 7, 2019 at 11:39 AM David Hildenbrand <> wrote:
> Unused, and memory unplug path should never care about zones. This is
> the job of memory offlining. ZONE_DEVICE might require special care -
> the caller of arch_remove_memory() should handle this.

The ZONE_DEVICE usage does not require special care so you can drop
that comment. The only place it's used in the subsection patches is to
lookup the node-id, but it turns out that the resulting node-id is
then never used.

With the ZONE_DEVICE mention dropped out of changelog you can add:

Reviewed-by: Dan Williams <>

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