mm/hugetlb: remove obsolete bootmem cross-zone checks

Browse source

Bootmem gigantic HugeTLB pages used to be validated again during
gather_bootmem_prealloc_node() and any cross-zone pages were discarded
there.

That validation is no longer needed.  Cross-zone bootmem gigantic pages
are now detected during allocation and freed before they reach the later
bootmem gathering path, so the remaining pages are already zone-valid.

Remove the obsolete cross-zone validation, invalid-page freeing, and the
associated discarded-page accounting.

Link: https://lore.kernel.org/20260612035903.2468601-17-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Frank van der Linden <fvdl@google.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Oscar Salvador (SUSE) <osalvador@kernel.org>
Cc: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Cc: Usama Arif <usama.arif@linux.dev>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

This commit is contained in:

Muchun Song 2026-06-12 11:59:00 +08:00 • committed by Andrew Morton

parent 51d73513dd

commit 4753a8220a

2 changed files with 0 additions and 73 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

include/linux/hugetlb.h

View file

70

mm/hugetlb.c

View file