linux-stable.git/mm/internal.h, branch v6.4

mm: correct arg in reclaim_pages()/reclaim_clean_pages_from_list()

2023-04-21T21:52:02+00:00

Both of them change the arg from page_list to folio_list when convert them
to use a folio, but not the declaration, let's correct it, also move the
reclaim_pages() from swap.h to internal.h as it only used in mm.

Link: https://lkml.kernel.org/r/20230417114807.186786-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang 
Reviwed-by: Matthew Wilcox (Oracle) 
Reviewed-by: SeongJae Park 
Reviewed-by: David Hildenbrand 
Cc: Hugh Dickins 
Signed-off-by: Andrew Morton

mm: apply __must_check to vmap_pages_range_noflush()

2023-04-18T23:30:10+00:00

To prevent errors when vmap_pages_range_noflush() or
__vmap_pages_range_noflush() silently fail (see the link below for an
example), annotate them with __must_check so that the callers do not
unconditionally assume the mapping succeeded.

Link: https://lkml.kernel.org/r/20230413131223.4135168-4-glider@google.com
Signed-off-by: Alexander Potapenko 
Reported-by: Dipanjan Das 
  Link: https://lore.kernel.org/linux-mm/CANX2M5ZRrRA64k0hOif02TjmY9kbbO2aCBPyq79es34RXZ=cAw@mail.gmail.com/
Reviewed-by: Marco Elver 
Cc: Christoph Hellwig 
Cc: Dmitry Vyukov 
Cc: Uladzislau Rezki (Sony) 
Signed-off-by: Andrew Morton

mm: move free_area_empty() to mm/internal.h

2023-04-18T23:29:47+00:00

The free_area_empty() helper is only used inside mm/ so move it there to
reduce noise in include/linux/mmzone.h

Link: https://lkml.kernel.org/r/20230326160215.2674531-1-rppt@kernel.org
Signed-off-by: Mike Rapoport (IBM) 
Suggested-by: Matthew Wilcox (Oracle) 
Signed-off-by: Andrew Morton

mm: conditionally write-lock VMA in free_pgtables

2023-04-06T03:02:59+00:00

Normally free_pgtables needs to lock affected VMAs except for the case
when VMAs were isolated under VMA write-lock.  munmap() does just that,
isolating while holding appropriate locks and then downgrading mmap_lock
and dropping per-VMA locks before freeing page tables.  Add a parameter to
free_pgtables for such scenario.

Link: https://lkml.kernel.org/r/20230227173632.3292573-20-surenb@google.com
Signed-off-by: Suren Baghdasaryan 
Signed-off-by: Andrew Morton

mm: move vmalloc_init() declaration to mm/internal.h

2023-04-06T02:42:55+00:00

vmalloc_init() is called only from mm_core_init(), there is no need to
declare it in include/linux/vmalloc.h

Move vmalloc_init() declaration to mm/internal.h

Link: https://lkml.kernel.org/r/20230321170513.2401534-14-rppt@kernel.org
Signed-off-by: Mike Rapoport (IBM) 
Reviewed-by: David Hildenbrand 
Reviewed-by: Vlastimil Babka 
Cc: Doug Berger 
Cc: Matthew Wilcox (Oracle) 
Cc: Mel Gorman 
Cc: Michal Hocko 
Cc: Thomas Bogendoerfer 
Signed-off-by: Andrew Morton

mm: move mem_init_print_info() to mm_init.c

2023-04-06T02:42:54+00:00

mem_init_print_info() is only called from mm_core_init().

Move it close to the caller and make it static.

Link: https://lkml.kernel.org/r/20230321170513.2401534-12-rppt@kernel.org
Signed-off-by: Mike Rapoport (IBM) 
Acked-by: David Hildenbrand 
Reviewed-by: Vlastimil Babka 
Cc: Doug Berger 
Cc: Matthew Wilcox (Oracle) 
Cc: Mel Gorman 
Cc: Michal Hocko 
Cc: Thomas Bogendoerfer 
Signed-off-by: Andrew Morton

mm: move init_mem_debugging_and_hardening() to mm/mm_init.c

2023-04-06T02:42:54+00:00

init_mem_debugging_and_hardening() is only called from mm_core_init().

Move it close to the caller, make it static and rename it to
mem_debugging_and_hardening_init() for consistency with surrounding
convention.

Link: https://lkml.kernel.org/r/20230321170513.2401534-10-rppt@kernel.org
Signed-off-by: Mike Rapoport (IBM) 
Acked-by: David Hildenbrand 
Reviewed-by: Vlastimil Babka 
Cc: Doug Berger 
Cc: Matthew Wilcox (Oracle) 
Cc: Mel Gorman 
Cc: Michal Hocko 
Cc: Thomas Bogendoerfer 
Signed-off-by: Andrew Morton

mm: move most of core MM initialization to mm/mm_init.c

2023-04-06T02:42:52+00:00

The bulk of memory management initialization code is spread all over
mm/page_alloc.c and makes navigating through page allocator functionality
difficult.

Move most of the functions marked __init and __meminit to mm/mm_init.c to
make it better localized and allow some more spare room before
mm/page_alloc.c reaches 10k lines.

No functional changes.

Link: https://lkml.kernel.org/r/20230321170513.2401534-4-rppt@kernel.org
Signed-off-by: Mike Rapoport (IBM) 
Acked-by: David Hildenbrand 
Acked-by: Vlastimil Babka 
Cc: Doug Berger 
Cc: Matthew Wilcox (Oracle) 
Cc: Mel Gorman 
Cc: Michal Hocko 
Cc: Thomas Bogendoerfer 
Signed-off-by: Andrew Morton

mm, printk: introduce new format %pGt for page_type

2023-03-28T23:20:09+00:00

%pGp format is used to display 'flags' field of a struct page.  However,
some page flags (i.e.  PG_buddy, see page-flags.h for more details) are
stored in page_type field.  To display human-readable output of page_type,
introduce %pGt format.

It is important to note the meaning of bits are different in page_type. 
if page_type is 0xffffffff, no flags are set.  Setting PG_buddy
(0x00000080) flag results in a page_type of 0xffffff7f.  Clearing a bit
actually means setting a flag.  Bits in page_type are inverted when
displaying type names.

Only values for which page_type_has_type() returns true are considered as
page_type, to avoid confusion with mapcount values.  if it returns false,
only raw values are displayed and not page type names.

Link: https://lkml.kernel.org/r/20230130042514.2418-3-42.hyeyoo@gmail.com
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Reviewed-by: Petr Mladek 	[vsprintf part]
Cc: Andy Shevchenko 
Cc: David Hildenbrand 
Cc: Joe Perches 
Cc: John Ogness 
Cc: Matthew Wilcox 
Cc: Sergey Senozhatsky 
Cc: Steven Rostedt (Google) 
Cc: Vlastimil Babka 
Signed-off-by: Andrew Morton

Merge tag 'mm-stable-2023-02-20-13-37' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2023-02-24T01:09:35+00:00

Pull MM updates from Andrew Morton:

 - Daniel Verkamp has contributed a memfd series ("mm/memfd: add
   F_SEAL_EXEC") which permits the setting of the memfd execute bit at
   memfd creation time, with the option of sealing the state of the X
   bit.

 - Peter Xu adds a patch series ("mm/hugetlb: Make huge_pte_offset()
   thread-safe for pmd unshare") which addresses a rare race condition
   related to PMD unsharing.

 - Several folioification patch serieses from Matthew Wilcox, Vishal
   Moola, Sidhartha Kumar and Lorenzo Stoakes

 - Johannes Weiner has a series ("mm: push down lock_page_memcg()")
   which does perform some memcg maintenance and cleanup work.

 - SeongJae Park has added DAMOS filtering to DAMON, with the series
   "mm/damon/core: implement damos filter".

   These filters provide users with finer-grained control over DAMOS's
   actions. SeongJae has also done some DAMON cleanup work.

 - Kairui Song adds a series ("Clean up and fixes for swap").

 - Vernon Yang contributed the series "Clean up and refinement for maple
   tree".

 - Yu Zhao has contributed the "mm: multi-gen LRU: memcg LRU" series. It
   adds to MGLRU an LRU of memcgs, to improve the scalability of global
   reclaim.

 - David Hildenbrand has added some userfaultfd cleanup work in the
   series "mm: uffd-wp + change_protection() cleanups".

 - Christoph Hellwig has removed the generic_writepages() library
   function in the series "remove generic_writepages".

 - Baolin Wang has performed some maintenance on the compaction code in
   his series "Some small improvements for compaction".

 - Sidhartha Kumar is doing some maintenance work on struct page in his
   series "Get rid of tail page fields".

 - David Hildenbrand contributed some cleanup, bugfixing and
   generalization of pte management and of pte debugging in his series
   "mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE on all architectures with
   swap PTEs".

 - Mel Gorman and Neil Brown have removed the __GFP_ATOMIC allocation
   flag in the series "Discard __GFP_ATOMIC".

 - Sergey Senozhatsky has improved zsmalloc's memory utilization with
   his series "zsmalloc: make zspage chain size configurable".

 - Joey Gouly has added prctl() support for prohibiting the creation of
   writeable+executable mappings.

   The previous BPF-based approach had shortcomings. See "mm: In-kernel
   support for memory-deny-write-execute (MDWE)".

 - Waiman Long did some kmemleak cleanup and bugfixing in the series
   "mm/kmemleak: Simplify kmemleak_cond_resched() & fix UAF".

 - T.J. Alumbaugh has contributed some MGLRU cleanup work in his series
   "mm: multi-gen LRU: improve".

 - Jiaqi Yan has provided some enhancements to our memory error
   statistics reporting, mainly by presenting the statistics on a
   per-node basis. See the series "Introduce per NUMA node memory error
   statistics".

 - Mel Gorman has a second and hopefully final shot at fixing a CPU-hog
   regression in compaction via his series "Fix excessive CPU usage
   during compaction".

 - Christoph Hellwig does some vmalloc maintenance work in the series
   "cleanup vfree and vunmap".

 - Christoph Hellwig has removed block_device_operations.rw_page() in
   ths series "remove ->rw_page".

 - We get some maple_tree improvements and cleanups in Liam Howlett's
   series "VMA tree type safety and remove __vma_adjust()".

 - Suren Baghdasaryan has done some work on the maintainability of our
   vm_flags handling in the series "introduce vm_flags modifier
   functions".

 - Some pagemap cleanup and generalization work in Mike Rapoport's
   series "mm, arch: add generic implementation of pfn_valid() for
   FLATMEM" and "fixups for generic implementation of pfn_valid()"

 - Baoquan He has done some work to make /proc/vmallocinfo and
   /proc/kcore better represent the real state of things in his series
   "mm/vmalloc.c: allow vread() to read out vm_map_ram areas".

 - Jason Gunthorpe rationalized the GUP system's interface to the rest
   of the kernel in the series "Simplify the external interface for
   GUP".

 - SeongJae Park wishes to migrate people from DAMON's debugfs interface
   over to its sysfs interface. To support this, we'll temporarily be
   printing warnings when people use the debugfs interface. See the
   series "mm/damon: deprecate DAMON debugfs interface".

 - Andrey Konovalov provided the accurately named "lib/stackdepot: fixes
   and clean-ups" series.

 - Huang Ying has provided a dramatic reduction in migration's TLB flush
   IPI rates with the series "migrate_pages(): batch TLB flushing".

 - Arnd Bergmann has some objtool fixups in "objtool warning fixes".

* tag 'mm-stable-2023-02-20-13-37' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (505 commits)
  include/linux/migrate.h: remove unneeded externs
  mm/memory_hotplug: cleanup return value handing in do_migrate_range()
  mm/uffd: fix comment in handling pte markers
  mm: change to return bool for isolate_movable_page()
  mm: hugetlb: change to return bool for isolate_hugetlb()
  mm: change to return bool for isolate_lru_page()
  mm: change to return bool for folio_isolate_lru()
  objtool: add UACCESS exceptions for __tsan_volatile_read/write
  kmsan: disable ftrace in kmsan core code
  kasan: mark addr_has_metadata __always_inline
  mm: memcontrol: rename memcg_kmem_enabled()
  sh: initialize max_mapnr
  m68k/nommu: add missing definition of ARCH_PFN_OFFSET
  mm: percpu: fix incorrect size in pcpu_obj_full_size()
  maple_tree: reduce stack usage with gcc-9 and earlier
  mm: page_alloc: call panic() when memoryless node allocation fails
  mm: multi-gen LRU: avoid futile retries
  migrate_pages: move THP/hugetlb migration support check to simplify code
  migrate_pages: batch flushing TLB
  migrate_pages: share more code between _unmap and _move
  ...