linux-kernel - Re: [PATCH 3/8] mm: use vmem_altmap code without CONFIG_ZONE

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Date:   Thu, 16 Nov 2023 19:43:00 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Sumanth Korikkar <sumanthk@...ux.ibm.com>,
        linux-mm <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Oscar Salvador <osalvador@...e.de>, Michal Hocko <mhocko@...e.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Gerald Schaefer <gerald.schaefer@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        linux-s390 <linux-s390@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/8] mm: use vmem_altmap code without CONFIG_ZONE_DEVICE

On 14.11.23 19:02, Sumanth Korikkar wrote:
> vmem_altmap_free() and vmem_altmap_offset() could be utlized without
> CONFIG_ZONE_DEVICE enabled. Hence, move it to sparse-vmemmap.c

Maybe give an example: For example mm/memory_hotplug.c:__add_pages() 
relies on that.

The altmap is no longer restricted to ZONE_DEVICE handling.

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 
Cheers,

David / dhildenb