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From: Sumanth Korikkar <sumanthk@linux.ibm.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	David Hildenbrand <david@redhat.com>,
	linux-mm <linux-mm@kvack.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	linux-s390 <linux-s390@vger.kernel.org>,
	Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
	Heiko Carstens <hca@linux.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	Alexander Gordeev <agordeev@linux.ibm.com>,
	Sumanth Korikkar <sumanthk@linux.ibm.com>
Subject: [PATCH 3/4] s390/sclp: Remove MHP_OFFLINE_INACCESSIBLE
Date: Fri, 26 Sep 2025 15:15:26 +0200	[thread overview]
Message-ID: <20250926131527.3260733-4-sumanthk@linux.ibm.com> (raw)
In-Reply-To: <20250926131527.3260733-1-sumanthk@linux.ibm.com>

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@linux.ibm.com>
Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
---
 drivers/s390/char/sclp_mem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/s390/char/sclp_mem.c b/drivers/s390/char/sclp_mem.c
index 802439230294..f49b8457e721 100644
--- a/drivers/s390/char/sclp_mem.c
+++ b/drivers/s390/char/sclp_mem.c
@@ -267,7 +267,7 @@ static ssize_t config_mblock_store(struct kobject *kobj, struct kobj_attribute *
 		__arch_set_page_nodat((void *)__va(addr), block_size >> PAGE_SHIFT);
 		rc = __add_memory(0, addr, block_size,
 				  mblock->memmap_on_memory ?
-				  MHP_MEMMAP_ON_MEMORY | MHP_OFFLINE_INACCESSIBLE : MHP_NONE);
+				  MHP_MEMMAP_ON_MEMORY : MHP_NONE);
 		if (rc)
 			goto out_unlock;
 		mem = find_memory_block(pfn_to_section_nr(PFN_DOWN(addr)));
-- 
2.48.1


  parent reply	other threads:[~2025-09-26 13:15 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-09-26 13:15 [PATCH 0/4] Support dynamic (de)configuration of memory Sumanth Korikkar
2025-09-26 13:15 ` [PATCH 1/4] s390/mm: Support removal of boot-allocated virtual memory map Sumanth Korikkar
2025-09-26 13:15 ` [PATCH 2/4] s390/sclp: Add support for dynamic (de)configuration of memory Sumanth Korikkar
2025-10-07 20:07   ` David Hildenbrand
2025-10-08  6:46     ` Sumanth Korikkar
2025-10-08  8:05       ` David Hildenbrand
2025-09-26 13:15 ` Sumanth Korikkar [this message]
2025-10-07 19:39   ` [PATCH 3/4] s390/sclp: Remove MHP_OFFLINE_INACCESSIBLE David Hildenbrand
2025-09-26 13:15 ` [PATCH 4/4] mm/memory_hotplug: Remove MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers Sumanth Korikkar
2025-10-07 14:30 ` [PATCH 0/4] Support dynamic (de)configuration of memory Sumanth Korikkar
2025-10-07 16:02   ` David Hildenbrand
2025-10-07 16:11 ` David Hildenbrand
2025-10-07 17:56   ` Sumanth Korikkar
2025-10-07 19:35     ` David Hildenbrand
2025-10-08  6:05       ` Sumanth Korikkar
2025-10-08  8:02         ` David Hildenbrand
2025-10-08  9:12           ` Heiko Carstens
2025-10-08  9:43             ` David Hildenbrand
2025-10-08  9:13           ` Sumanth Korikkar
2025-10-08  9:33             ` David Hildenbrand

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