From: "David Hildenbrand (Arm)" <david@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, linux-cxl@vger.kernel.org,
"David Hildenbrand (Arm)" <david@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Oscar Salvador <osalvador@suse.de>,
Axel Rasmussen <axelrasmussen@google.com>,
Yuanchu Xie <yuanchu@google.com>, Wei Xu <weixugc@google.com>,
Lorenzo Stoakes <ljs@kernel.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>
Subject: [PATCH 11/14] mm/sparse: drop set_section_nid() from sparse_add_section()
Date: Tue, 17 Mar 2026 17:56:49 +0100 [thread overview]
Message-ID: <20260317165652.99114-12-david@kernel.org> (raw)
In-Reply-To: <20260317165652.99114-1-david@kernel.org>
CONFIG_MEMORY_HOTPLUG is CONFIG_SPARSEMEM_VMEMMAP-only. And
CONFIG_SPARSEMEM_VMEMMAP implies that NODE_NOT_IN_PAGE_FLAGS cannot be set:
see include/linux/page-flags-layout.h
...
#elif defined(CONFIG_SPARSEMEM_VMEMMAP)
#error "Vmemmap: No space for nodes field in page flags"
...
So let's remove the set_section_nid() call to prepare for moving
CONFIG_MEMORY_HOTPLUG to mm/sparse-vmemmap.c
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
---
mm/sparse.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/mm/sparse.c b/mm/sparse.c
index 7b0bfea73a9b..b5a2de43ac40 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -769,7 +769,6 @@ int __meminit sparse_add_section(int nid, unsigned long start_pfn,
page_init_poison(memmap, sizeof(struct page) * nr_pages);
ms = __nr_to_section(section_nr);
- set_section_nid(section_nr, nid);
__section_mark_present(ms, section_nr);
/* Align memmap to section boundary in the subsection case */
--
2.43.0
next prev parent reply other threads:[~2026-03-17 16:57 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-17 16:56 [PATCH 00/14] mm: memory hot(un)plug and SPARSEMEM cleanups David Hildenbrand (Arm)
2026-03-17 16:56 ` [PATCH 01/14] mm/memory_hotplug: remove for_each_valid_pfn() usage David Hildenbrand (Arm)
2026-03-17 17:19 ` Lorenzo Stoakes (Oracle)
2026-03-17 20:30 ` David Hildenbrand (Arm)
2026-03-18 7:51 ` Mike Rapoport
2026-03-17 16:56 ` [PATCH 02/14] mm/sparse: remove WARN_ONs from (online|offline)_mem_sections() David Hildenbrand (Arm)
2026-03-17 17:21 ` Lorenzo Stoakes (Oracle)
2026-03-18 7:53 ` Mike Rapoport
2026-03-17 16:56 ` [PATCH 03/14] mm/Kconfig: make CONFIG_MEMORY_HOTPLUG depend on CONFIG_SPARSEMEM_VMEMMAP David Hildenbrand (Arm)
2026-03-17 17:22 ` Lorenzo Stoakes (Oracle)
2026-03-18 7:55 ` Mike Rapoport
2026-03-17 16:56 ` [PATCH 04/14] mm/memory_hotplug: simplify check_pfn_span() David Hildenbrand (Arm)
2026-03-17 17:24 ` Lorenzo Stoakes (Oracle)
2026-03-18 7:56 ` Mike Rapoport
2026-03-17 16:56 ` [PATCH 05/14] mm/sparse: remove !CONFIG_SPARSEMEM_VMEMMAP leftovers for CONFIG_MEMORY_HOTPLUG David Hildenbrand (Arm)
2026-03-17 17:54 ` Lorenzo Stoakes (Oracle)
2026-03-18 7:58 ` Mike Rapoport
2026-03-17 16:56 ` [PATCH 06/14] mm/bootmem_info: remove handling for !CONFIG_SPARSEMEM_VMEMMAP David Hildenbrand (Arm)
2026-03-17 17:49 ` Lorenzo Stoakes (Oracle)
2026-03-18 8:15 ` Mike Rapoport
2026-03-20 18:37 ` David Hildenbrand (Arm)
2026-03-17 16:56 ` [PATCH 07/14] mm/bootmem_info: avoid using sparse_decode_mem_map() David Hildenbrand (Arm)
2026-03-17 18:02 ` Lorenzo Stoakes (Oracle)
2026-03-18 8:20 ` Mike Rapoport
2026-03-17 16:56 ` [PATCH 08/14] mm/sparse: remove sparse_decode_mem_map() David Hildenbrand (Arm)
2026-03-17 19:25 ` Lorenzo Stoakes (Oracle)
2026-03-18 8:20 ` Mike Rapoport
2026-03-17 16:56 ` [PATCH 09/14] mm/sparse: remove CONFIG_MEMORY_HOTPLUG-specific usemap allocation handling David Hildenbrand (Arm)
2026-03-17 19:48 ` Lorenzo Stoakes (Oracle)
2026-03-20 18:49 ` David Hildenbrand (Arm)
2026-03-20 18:58 ` David Hildenbrand (Arm)
2026-03-18 8:34 ` Mike Rapoport
2026-03-17 16:56 ` [PATCH 10/14] mm: prepare to move subsection_map_init() to mm/sparse-vmemmap.c David Hildenbrand (Arm)
2026-03-17 19:51 ` Lorenzo Stoakes (Oracle)
2026-03-20 18:59 ` David Hildenbrand (Arm)
2026-03-18 8:46 ` Mike Rapoport
2026-03-20 19:01 ` David Hildenbrand (Arm)
2026-03-17 16:56 ` David Hildenbrand (Arm) [this message]
2026-03-17 19:55 ` [PATCH 11/14] mm/sparse: drop set_section_nid() from sparse_add_section() Lorenzo Stoakes (Oracle)
2026-03-18 8:50 ` Mike Rapoport
2026-03-17 16:56 ` [PATCH 12/14] mm/sparse: move sparse_init_one_section() to internal.h David Hildenbrand (Arm)
2026-03-17 20:00 ` Lorenzo Stoakes (Oracle)
2026-03-18 8:54 ` Mike Rapoport
2026-03-17 16:56 ` [PATCH 13/14] mm/sparse: move __section_mark_present() " David Hildenbrand (Arm)
2026-03-17 20:01 ` Lorenzo Stoakes (Oracle)
2026-03-18 8:56 ` Mike Rapoport
2026-03-20 19:06 ` David Hildenbrand (Arm)
2026-03-17 16:56 ` [PATCH 14/14] mm/sparse: move memory hotplug bits to sparse-vmemmap.c David Hildenbrand (Arm)
2026-03-17 20:09 ` Lorenzo Stoakes (Oracle)
2026-03-20 19:07 ` David Hildenbrand (Arm)
2026-03-18 8:57 ` Mike Rapoport
2026-03-18 19:51 ` [PATCH 00/14] mm: memory hot(un)plug and SPARSEMEM cleanups Andrew Morton
2026-03-18 19:54 ` David Hildenbrand (Arm)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260317165652.99114-12-david@kernel.org \
--to=david@kernel.org \
--cc=Liam.Howlett@oracle.com \
--cc=akpm@linux-foundation.org \
--cc=axelrasmussen@google.com \
--cc=linux-cxl@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=ljs@kernel.org \
--cc=mhocko@suse.com \
--cc=osalvador@suse.de \
--cc=rppt@kernel.org \
--cc=surenb@google.com \
--cc=vbabka@kernel.org \
--cc=weixugc@google.com \
--cc=yuanchu@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.