linux.git/mm/mm_init.c, branch v6.6

mm/mm_init: use helper macro BITS_PER_LONG and BITS_PER_BYTE

2023-08-21T20:37:47+00:00

It's more readable to use helper macro BITS_PER_LONG and BITS_PER_BYTE. 
No functional change intended.

Link: https://lkml.kernel.org/r/20230807023528.325191-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin 
Reviewed-by: David Hildenbrand 
Reviewed-by: Mike Rapoport (IBM) 
Signed-off-by: Andrew Morton

mm: disable kernelcore=mirror when no mirror memory

2023-08-21T20:37:43+00:00

For system with kernelcore=mirror enabled while no mirrored memory is
reported by efi.  This could lead to kernel OOM during startup since all
memory beside zone DMA are in the movable zone and this prevents the
kernel to use it.

Zone DMA/DMA32 initialization is independent of mirrored memory and their
max pfn is set in zone_sizes_init().  Since kernel can fallback to zone
DMA/DMA32 if there is no memory in zone Normal, these zones are seen as
mirrored memory no mather their memory attributes are.

To solve this problem, disable kernelcore=mirror when there is no real
mirrored memory exists.

Link: https://lkml.kernel.org/r/20230802072328.2107981-1-mawupeng1@huawei.com
Signed-off-by: Ma Wupeng 
Suggested-by: Kefeng Wang 
Suggested-by: Mike Rapoport 
Reviewed-by: Mike Rapoport (IBM) 
Reviewed-by: Kefeng Wang 
Cc: Levi Yun 
Signed-off-by: Andrew Morton

mm: no need to export mm_kobj

2023-08-21T20:37:40+00:00

There are no modules using mm_kobj, so do not export it.

Link: https://lkml.kernel.org/r/2023080436-algebra-cabana-417d@gregkh
Signed-off-by: Greg Kroah-Hartman 
Reviewed-by: Mike Rapoport (IBM) 
Reviewed-by: Miaohe Lin 
Reviewed-by: David Hildenbrand 
Signed-off-by: Andrew Morton

mm/vmemmap: improve vmemmap_can_optimize and allow architectures to override

2023-08-18T17:12:53+00:00

dax vmemmap optimization requires a minimum of 2 PAGE_SIZE area within
vmemmap such that tail page mapping can point to the second PAGE_SIZE
area.  Enforce that in vmemmap_can_optimize() function.

Architectures like powerpc also want to enable vmemmap optimization
conditionally (only with radix MMU translation).  Hence allow architecture
override.

Link: https://lkml.kernel.org/r/20230724190759.483013-4-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V 
Reviewed-by: Christophe Leroy 
Cc: Catalin Marinas 
Cc: Dan Williams 
Cc: Joao Martins 
Cc: Michael Ellerman 
Cc: Mike Kravetz 
Cc: Muchun Song 
Cc: Nicholas Piggin 
Cc: Oscar Salvador 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

mm: kfence: allocate kfence_metadata at runtime

2023-08-18T17:12:39+00:00

kfence_metadata is currently a static array.  For the purpose of
allocating scalable __kfence_pool, we first change it to runtime
allocation of metadata.  Since the size of an object of kfence_metadata is
1160 bytes, we can save at least 72 pages (with default 256 objects)
without enabling kfence.

[akpm@linux-foundation.org: restore newline, per Marco]
Link: https://lkml.kernel.org/r/20230718073019.52513-1-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang 
Reviewed-by: Marco Elver 
Cc: Alexander Potapenko 
Cc: Dmitry Vyukov 
Cc: Muchun Song 
Signed-off-by: Andrew Morton

mm/mm_init.c: drop node_start_pfn from adjust_zone_range_for_zone_movable()

2023-08-18T17:12:37+00:00

node_start_pfn is not used in adjust_zone_range_for_zone_movable(), so it
is pointless to waste a function argument.  Drop the parameter.

Link: https://lkml.kernel.org/r/20230717065811.1262-1-haifeng.xu@shopee.com
Signed-off-by: Haifeng Xu 
Reviewed-by: David Hildenbrand 
Reviewed-by: Mike Rapoport (IBM) 
Reviewed-by: Anshuman Khandual 
Signed-off-by: Andrew Morton

mm/mm_init.c: mark check_for_memory() as __init

2023-08-18T17:12:18+00:00

The only caller of check_for_memory() is free_area_init(), which is
annotated with __init, so it should be safe to also mark the former as
__init.

Link: https://lkml.kernel.org/r/20230710093750.1294-1-haifeng.xu@shopee.com
Signed-off-by: Haifeng Xu 
Reviewed-by: Mike Rapoport (IBM) 
Reviewed-by: Anshuman Khandual 
Signed-off-by: Andrew Morton

mm/mm_init.c: remove obsolete macro HASH_SMALL

2023-08-18T17:12:07+00:00

HASH_SMALL only works when parameter numentries is 0. But the sole caller
futex_init() never calls alloc_large_system_hash() with numentries set to
0. So HASH_SMALL is obsolete and remove it.

Link: https://lkml.kernel.org/r/20230625021323.849147-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin 
Reviewed-by: Mike Rapoport (IBM) 
Cc: André Almeida 
Cc: Darren Hart 
Cc: Davidlohr Bueso 
Cc: Ingo Molnar 
Cc: Miaohe Lin 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Signed-off-by: Andrew Morton

mm/mm_init.c: update obsolete comment in get_pfn_range_for_nid()

2023-08-18T17:12:00+00:00

Since commit 633c0666b5a5 ("Memoryless nodes: drop one memoryless node boot
warning"), the warning for a node with no available memory is removed.
Update the corresponding comment.

Link: https://lkml.kernel.org/r/20230625033340.1054103-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin 
Reviewed-by: Mike Rapoport (IBM) 
Signed-off-by: Andrew Morton

Merge tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2023-06-28T17:28:11+00:00

Pull mm updates from Andrew Morton:

 - Yosry Ahmed brought back some cgroup v1 stats in OOM logs

 - Yosry has also eliminated cgroup's atomic rstat flushing

 - Nhat Pham adds the new cachestat() syscall. It provides userspace
   with the ability to query pagecache status - a similar concept to
   mincore() but more powerful and with improved usability

 - Mel Gorman provides more optimizations for compaction, reducing the
   prevalence of page rescanning

 - Lorenzo Stoakes has done some maintanance work on the
   get_user_pages() interface

 - Liam Howlett continues with cleanups and maintenance work to the
   maple tree code. Peng Zhang also does some work on maple tree

 - Johannes Weiner has done some cleanup work on the compaction code

 - David Hildenbrand has contributed additional selftests for
   get_user_pages()

 - Thomas Gleixner has contributed some maintenance and optimization
   work for the vmalloc code

 - Baolin Wang has provided some compaction cleanups,

 - SeongJae Park continues maintenance work on the DAMON code

 - Huang Ying has done some maintenance on the swap code's usage of
   device refcounting

 - Christoph Hellwig has some cleanups for the filemap/directio code

 - Ryan Roberts provides two patch series which yield some
   rationalization of the kernel's access to pte entries - use the
   provided APIs rather than open-coding accesses

 - Lorenzo Stoakes has some fixes to the interaction between pagecache
   and directio access to file mappings

 - John Hubbard has a series of fixes to the MM selftesting code

 - ZhangPeng continues the folio conversion campaign

 - Hugh Dickins has been working on the pagetable handling code, mainly
   with a view to reducing the load on the mmap_lock

 - Catalin Marinas has reduced the arm64 kmalloc() minimum alignment
   from 128 to 8

 - Domenico Cerasuolo has improved the zswap reclaim mechanism by
   reorganizing the LRU management

 - Matthew Wilcox provides some fixups to make gfs2 work better with the
   buffer_head code

 - Vishal Moola also has done some folio conversion work

 - Matthew Wilcox has removed the remnants of the pagevec code - their
   functionality is migrated over to struct folio_batch

* tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (380 commits)
  mm/hugetlb: remove hugetlb_set_page_subpool()
  mm: nommu: correct the range of mmap_sem_read_lock in task_mem()
  hugetlb: revert use of page_cache_next_miss()
  Revert "page cache: fix page_cache_next/prev_miss off by one"
  mm/vmscan: fix root proactive reclaim unthrottling unbalanced node
  mm: memcg: rename and document global_reclaim()
  mm: kill [add|del]_page_to_lru_list()
  mm: compaction: convert to use a folio in isolate_migratepages_block()
  mm: zswap: fix double invalidate with exclusive loads
  mm: remove unnecessary pagevec includes
  mm: remove references to pagevec
  mm: rename invalidate_mapping_pagevec to mapping_try_invalidate
  mm: remove struct pagevec
  net: convert sunrpc from pagevec to folio_batch
  i915: convert i915_gpu_error to use a folio_batch
  pagevec: rename fbatch_count()
  mm: remove check_move_unevictable_pages()
  drm: convert drm_gem_put_pages() to use a folio_batch
  i915: convert shmem_sg_free_table() to use a folio_batch
  scatterlist: add sg_set_folio()
  ...