linux-kernel - Re: [PATCH 3/4] s390/sclp: Remove MHP_OFFLINE

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Message-ID: <ba392005-8cb1-44c6-a4ca-7608423fea62@redhat.com>
Date: Tue, 7 Oct 2025 21:39:58 +0200
From: David Hildenbrand <david@...hat.com>
To: Sumanth Korikkar <sumanthk@...ux.ibm.com>,
 Andrew Morton <akpm@...ux-foundation.org>, linux-mm <linux-mm@...ck.org>
Cc: 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 3/4] s390/sclp: Remove MHP_OFFLINE_INACCESSIBLE

On 26.09.25 15:15, Sumanth Korikkar wrote:
> mhp_flag MHP_OFFLINE_INACCESSIBLE was used to mark memory as not
> accessible until memory hotplug online phase begins.
> 
> Earlier, standby memory blocks were added upfront during boottime and
> MHP_OFFLINE_INACCESSIBLE flag avoided page_init_poison() on memmap
> during mhp addtion phase.
> 
> However with dynamic runtime configuration of memory, standby memory can
> be brought to accessible state before performing add_memory(). Hence,
> remove MHP_OFFLINE_INACCESSIBLE.
> 
> Acked-by: Heiko Carstens <hca@...ux.ibm.com>
> Signed-off-by: Sumanth Korikkar <sumanthk@...ux.ibm.com>
> ---

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

-- 
Cheers

David / dhildenb