patches/old/mm-hugetlb-use-online-nodes-for-bootmem-allocation.patch

From: Frank van der Linden <fvdl@google.com>
Subject: mm/hugetlb: use online nodes for bootmem allocation
Date: Fri, 28 Feb 2025 18:29:07 +0000

Later commits will move hugetlb bootmem allocation to earlier in init,
when N_MEMORY has not yet been set on nodes.  Use online nodes instead. 
At most, this wastes just a few cycles once during boot (and most likely
none).

Link: https://lkml.kernel.org/r/20250228182928.2645936-7-fvdl@google.com
Signed-off-by: Frank van der Linden <fvdl@google.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dan Carpenter <dan.carpenter@linaro.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roman Gushchin (Cruise) <roman.gushchin@linux.dev>
Cc: Usama Arif <usamaarif642@gmail.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/hugetlb.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/mm/hugetlb.c~mm-hugetlb-use-online-nodes-for-bootmem-allocation
+++ a/mm/hugetlb.c
@@ -3164,7 +3164,7 @@ int __alloc_bootmem_huge_page(struct hst
 		goto found;
 	}
 	/* allocate from next node when distributing huge pages */
-	for_each_node_mask_to_alloc(&h->next_nid_to_alloc, nr_nodes, node, &node_states[N_MEMORY]) {
+	for_each_node_mask_to_alloc(&h->next_nid_to_alloc, nr_nodes, node, &node_states[N_ONLINE]) {
 		m = memblock_alloc_try_nid_raw(
 				huge_page_size(h), huge_page_size(h),
 				0, MEMBLOCK_ALLOC_ACCESSIBLE, node);
@@ -4558,8 +4558,8 @@ void __init hugetlb_add_hstate(unsigned
 	for (i = 0; i < MAX_NUMNODES; ++i)
 		INIT_LIST_HEAD(&h->hugepage_freelists[i]);
 	INIT_LIST_HEAD(&h->hugepage_activelist);
-	h->next_nid_to_alloc = first_memory_node;
-	h->next_nid_to_free = first_memory_node;
+	h->next_nid_to_alloc = first_online_node;
+	h->next_nid_to_free = first_online_node;
 	snprintf(h->name, HSTATE_NAME_LEN, "hugepages-%lukB",
 					huge_page_size(h)/SZ_1K);
 
_