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Commit 8dcd175b authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'akpm' (patches from Andrew) 

Merge misc updates from Andrew Morton:

 - a few misc things

 - ocfs2 updates

 - most of MM

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (159 commits)
  tools/testing/selftests/proc/proc-self-syscall.c: remove duplicate include
  proc: more robust bulk read test
  proc: test /proc/*/maps, smaps, smaps_rollup, statm
  proc: use seq_puts() everywhere
  proc: read kernel cpu stat pointer once
  proc: remove unused argument in proc_pid_lookup()
  fs/proc/thread_self.c: code cleanup for proc_setup_thread_self()
  fs/proc/self.c: code cleanup for proc_setup_self()
  proc: return exit code 4 for skipped tests
  mm,mremap: bail out earlier in mremap_to under map pressure
  mm/sparse: fix a bad comparison
  mm/memory.c: do_fault: avoid usage of stale vm_area_struct
  writeback: fix inode cgroup switching comment
  mm/huge_memory.c: fix "orig_pud" set but not used
  mm/hotplug: fix an imbalance with DEBUG_PAGEALLOC
  mm/memcontrol.c: fix bad line in comment
  mm/cma.c: cma_declare_contiguous: correct err handling
  mm/page_ext.c: fix an imbalance with kmemleak
  mm/compaction: pass pgdat to too_many_isolated() instead of zone
  mm: remove zone_lru_lock() function, access ->lru_lock directly
  ...
parents afe6fe70 fff04900

Documentation/admin-guide/cgroup-v2.rst

+16 −0
Original line number Diff line number Diff line
@@ -1189,6 +1189,10 @@ PAGE_SIZE multiple when read back. 
		Amount of cached filesystem data that was modified and

		is currently being written back to disk



	  anon_thp

		Amount of memory used in anonymous mappings backed by

		transparent hugepages



	  inactive_anon, active_anon, inactive_file, active_file, unevictable

		Amount of memory, swap-backed and filesystem-backed,

		on the internal memory management lists used by the
@@ -1248,6 +1252,18 @@ PAGE_SIZE multiple when read back. 


		Amount of reclaimed lazyfree pages



	  thp_fault_alloc



		Number of transparent hugepages which were allocated to satisfy

		a page fault, including COW faults. This counter is not present

		when CONFIG_TRANSPARENT_HUGEPAGE is not set.



	  thp_collapse_alloc



		Number of transparent hugepages which were allocated to allow

		collapsing an existing range of pages. This counter is not

		present when CONFIG_TRANSPARENT_HUGEPAGE is not set.



  memory.swap.current

	A read-only single value file which exists on non-root

	cgroups.

Documentation/admin-guide/mm/pagemap.rst

+6 −3
Original line number Diff line number Diff line
@@ -75,9 +75,10 @@ number of times a page is mapped. 
    20. NOPAGE

    21. KSM

    22. THP

    23. BALLOON

    23. OFFLINE

    24. ZERO_PAGE

    25. IDLE

    26. PGTABLE



 * ``/proc/kpagecgroup``.  This file contains a 64-bit inode number of the

   memory cgroup each page is charged to, indexed by PFN. Only available when
@@ -118,8 +119,8 @@ Short descriptions to the page flags 
    identical memory pages dynamically shared between one or more processes

22 - THP

    contiguous pages which construct transparent hugepages

23 - BALLOON

    balloon compaction page

23 - OFFLINE

    page is logically offline

24 - ZERO_PAGE

    zero page for pfn_zero or huge_zero page

25 - IDLE
@@ -128,6 +129,8 @@ Short descriptions to the page flags 
    Note that this flag may be stale in case the page was accessed via

    a PTE. To make sure the flag is up-to-date one has to read

    ``/sys/kernel/mm/page_idle/bitmap`` first.

26 - PGTABLE

    page is in use as a page table



IO related page flags

---------------------

Documentation/cgroup-v1/memcg_test.txt

+2 −2
Original line number Diff line number Diff line
@@ -107,9 +107,9 @@ Under below explanation, we assume CONFIG_MEM_RES_CTRL_SWAP=y. 


8. LRU

        Each memcg has its own private LRU. Now, its handling is under global

	VM's control (means that it's handled under global zone_lru_lock).

	VM's control (means that it's handled under global pgdat->lru_lock).

	Almost all routines around memcg's LRU is called by global LRU's

	list management functions under zone_lru_lock().

	list management functions under pgdat->lru_lock.



	A special function is mem_cgroup_isolate_pages(). This scans

	memcg's private LRU and call __isolate_lru_page() to extract a page

Documentation/cgroup-v1/memory.txt

+2 −2
Original line number Diff line number Diff line
@@ -267,11 +267,11 @@ When oom event notifier is registered, event will be delivered. 
   Other lock order is following:

   PG_locked.

   mm->page_table_lock

       zone_lru_lock

       pgdat->lru_lock

	  lock_page_cgroup.

  In many cases, just lock_page_cgroup() is called.

  per-zone-per-cgroup LRU (cgroup's private LRU) is just guarded by

  zone_lru_lock, it has no lock of its own.

  pgdat->lru_lock, it has no lock of its own.



2.7 Kernel Memory Extension (CONFIG_MEMCG_KMEM)

MAINTAINERS

+8 −0
Original line number Diff line number Diff line
@@ -9835,6 +9835,14 @@ F: kernel/sched/membarrier.c 
F:	include/uapi/linux/membarrier.h

F:	arch/powerpc/include/asm/membarrier.h



MEMBLOCK

M:	Mike Rapoport <rppt@linux.ibm.com>

L:	linux-mm@kvack.org

S:	Maintained

F:	include/linux/memblock.h

F:	mm/memblock.c

F:	Documentation/core-api/boot-time-mm.rst



MEMORY MANAGEMENT

L:	linux-mm@kvack.org

W:	http://www.linux-mm.org