Kernel commit acc53a0b4c156 ("mm: rename page->index to page->__folio_index"), which is contained in Linux 6.16-rc1 and later kernels, renamed the member. Without the patch, the "kmem -p" option fails with the following error: kmem: invalid structure member offset: page_index FILE: memory.c LINE: 6016 FUNCTION: dump_mem_map_SPARSEMEM() Signed-off-by: Kazuhito Hagio <k-hagio-ab(a)nec.com&gt; --- memory.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/memory.c b/memory.c index 0d8d89862383..5cb8b58e2181 100644 --- a/memory.c +++ b/memory.c @@ -531,6 +531,8 @@ vm_init(void) ASSIGN_OFFSET(page_mapping) = MEMBER_OFFSET("page", "_mapcount") + STRUCT_SIZE("atomic_t") + sizeof(ulong); MEMBER_OFFSET_INIT(page_index, "page", "index"); + if (INVALID_MEMBER(page_index)) /* 6.16 and later */ + MEMBER_OFFSET_INIT(page_index, "page", "__folio_index"); if (INVALID_MEMBER(page_index)) ANON_MEMBER_OFFSET_INIT(page_index, "page", "index"); MEMBER_OFFSET_INIT(page_buffers, "page", "buffers"); -- 2.31.1