linux-kernel - Re: [PATCH v3 0/4] Support dynamic (de)configuration of memory

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Message-Id: <20251011114426.5313b7cb6951618c20ab62ca@linux-foundation.org>
Date: Sat, 11 Oct 2025 11:44:26 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Sumanth Korikkar <sumanthk@...ux.ibm.com>
Cc: David Hildenbrand <david@...hat.com>, linux-mm <linux-mm@...ck.org>,
 LKML <linux-kernel@...r.kernel.org>, linux-s390
 <linux-s390@...r.kernel.org>, Gerald Schaefer
 <gerald.schaefer@...ux.ibm.com>, Heiko Carstens <hca@...ux.ibm.com>, Vasily
 Gorbik <gor@...ux.ibm.com>, Alexander Gordeev <agordeev@...ux.ibm.com>
Subject: Re: [PATCH v3 0/4] Support dynamic (de)configuration of memory

On Fri, 10 Oct 2025 10:51:43 +0200 Sumanth Korikkar <sumanthk@...ux.ibm.com> wrote:

> Hi,
> 
> Patchset provides a new interface for dynamic configuration and
> deconfiguration of hotplug memory on s390, allowing with/without
> memmap_on_memory support. It is a follow up on the discussion with David
> when introducing memmap_on_memory support for s390 and support dynamic
> (de)configuration of memory:
> 
> ...
>
>  arch/s390/mm/pgalloc.c         |   2 +
>  arch/s390/mm/vmem.c            |  21 +--
>  drivers/base/memory.c          |  23 +--
>  drivers/s390/char/sclp_mem.c   | 288 +++++++++++++++++++++++----------
>  include/linux/memory.h         |   9 --
>  include/linux/memory_hotplug.h |  18 +--
>  include/linux/memremap.h       |   1 -
>  mm/memory_hotplug.c            |  17 +-
>  mm/sparse.c                    |   3 +-
>  9 files changed, 225 insertions(+), 157 deletions(-)

I can add this to mm.git in the usual fashion, but the s390 tree would
be a better place from a testing point of view?