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SeongJae Park a61ea561c8 mm/damon/sysfs: link DAMON for virtual address spaces monitoring 
This commit links the DAMON sysfs interface to DAMON so that users can
control DAMON via the interface.  In detail, this commit makes writing
'on' to 'state' file constructs DAMON contexts based on values that users
have written to relevant sysfs files and start the context.  It supports
only virtual address spaces monitoring at the moment, though.

The files hierarchy of DAMON sysfs interface after this commit is shown
below.  In the below figure, parents-children relations are represented
with indentations, each directory is having ``/`` suffix, and files in
each directory are separated by comma (",").

    /sys/kernel/mm/damon/admin
    │ kdamonds/nr_kdamonds
    │ │ 0/state,pid
    │ │ │ contexts/nr_contexts
    │ │ │ │ 0/operations
    │ │ │ │ │ monitoring_attrs/
    │ │ │ │ │ │ intervals/sample_us,aggr_us,update_us
    │ │ │ │ │ │ nr_regions/min,max
    │ │ │ │ │ targets/nr_targets
    │ │ │ │ │ │ 0/pid_target
    │ │ │ │ │ │ ...
    │ │ │ │ ...
    │ │ ...

The usage is straightforward.  Writing a number ('N') to each 'nr_*' file
makes directories named '0' to 'N-1'.  Users can construct DAMON contexts
by writing proper values to the files in the straightforward manner and
start each kdamond by writing 'on' to 'kdamonds/<N>/state'.

Link: https://lkml.kernel.org/r/20220228081314.5770-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Xin Hao <xhao@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-03-22 15:57:13 -07:00
..
damon
mm/damon/sysfs: link DAMON for virtual address spaces monitoring
2022-03-22 15:57:13 -07:00
kasan
lib/stackdepot: always do filter_irq_stacks() in stack_depot_save()
2022-01-22 08:33:38 +02:00
kfence
kfence: allow use of a deferrable timer
2022-03-22 15:57:11 -07:00
backing-dev.c
remove congestion tracking framework
2022-03-22 15:57:01 -07:00
balloon_compaction.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
bootmem_info.c
bootmem: Use page->index instead of page->freelist
2022-01-06 12:27:03 +01:00
cma_debug.c
mm/cma: change cma mutex to irq safe spinlock
2021-05-05 11:27:21 -07:00
cma_sysfs.c
mm: cma: support sysfs
2021-05-05 11:27:24 -07:00
cma.c
mm/cma: provide option to opt out from exposing pages on activation failure
2022-03-22 15:57:09 -07:00
cma.h
mm/cma: provide option to opt out from exposing pages on activation failure
2022-03-22 15:57:09 -07:00
compaction.c
mm: compaction: cleanup the compaction trace events
2022-03-22 15:57:09 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: remove pte entry from the page table
2022-02-04 09:25:04 -08:00
debug.c
mm,fs: split dump_mapping() out from dump_page()
2022-01-15 16:30:26 +02:00
dmapool.c
mm/dmapool.c: revert "make dma pool to use kmalloc_node"
2022-01-15 16:30:28 +02:00
early_ioremap.c
mm/early_ioremap: declare early_memremap_pgprot_adjust()
2022-03-22 15:57:11 -07:00
fadvise.c
remove inode_congested()
2022-03-22 15:57:01 -07:00
failslab.c
…
filemap.c
tmpfs: do not allocate pages on read
2022-03-22 15:57:02 -07:00
folio-compat.c
filemap: Add filemap_release_folio()
2022-01-04 13:15:34 -05:00
frontswap.c
frontswap: remove support for multiple ops
2022-01-22 08:33:38 +02:00
gup_test.c
selftests/vm: gup_test: test faulting in kernel, and verify pinnable pages
2021-05-05 11:27:26 -07:00
gup_test.h
selftests/vm: gup_test: fix test flag
2021-05-05 11:27:26 -07:00
gup.c
mm/gup: remove unused get_user_pages_locked()
2022-03-22 15:57:01 -07:00
highmem.c
mm/highmem: remove unnecessary done label
2022-03-22 15:57:11 -07:00
hmm.c
mm/hmm.c: remove unneeded local variable ret
2022-03-22 15:57:12 -07:00
huge_memory.c
memory tiering: skip to scan fast memory
2022-03-22 15:57:09 -07:00
hugetlb_cgroup.c
hugetlb: add hugetlb.*.numa_stat file
2022-01-15 16:30:29 +02:00
hugetlb_vmemmap.c
mm: hugetlb: replace hugetlb_free_vmemmap_enabled with a static_key
2022-03-22 15:57:08 -07:00
hugetlb_vmemmap.h
mm: hugetlb: introduce nr_free_vmemmap_pages in the struct hstate
2021-06-30 20:47:25 -07:00
hugetlb.c
userfaultfd: provide unmasked address on page-fault
2022-03-22 15:57:08 -07:00
hwpoison-inject.c
mm/hwpoison: avoid the impact of hwpoison_filter() return value on mce handler
2022-03-22 15:57:07 -07:00
init-mm.c
mm: add setup_initial_init_mm() helper
2021-07-08 11:48:21 -07:00
internal.h
mm/early_ioremap: declare early_memremap_pgprot_adjust()
2022-03-22 15:57:11 -07:00
interval_tree.c
mm/interval_tree: add comments to improve code readability
2021-04-30 11:20:38 -07:00
io-mapping.c
mm: add a io_mapping_map_user helper
2021-04-30 11:20:39 -07:00
ioremap.c
mm: move ioremap_page_range to vmalloc.c
2021-09-08 11:50:24 -07:00
Kconfig
mm/hugetlb: generalize ARCH_WANT_GENERAL_HUGETLB
2022-03-22 15:57:08 -07:00
Kconfig.debug
mm: page table check
2022-01-15 16:30:28 +02:00
khugepaged.c
mm/page_table_check: check entries at pmd levels
2022-02-04 09:25:04 -08:00
kmemleak.c
mm/kmemleak: avoid scanning potential huge holes
2022-02-04 09:25:05 -08:00
ksm.c
mm/ksm: use helper macro __ATTR_RW
2022-03-22 15:57:09 -07:00
list_lru.c
mm/list_lru: optimize memcg_reparent_list_lru_node()
2022-03-22 15:57:08 -07:00
maccess.c
mm: uninline copy_overflow()
2022-03-22 15:57:11 -07:00
madvise.c
mm: madvise: skip unmapped vma holes passed to process_madvise
2022-03-22 15:57:10 -07:00
Makefile
mm: remove cleancache
2022-01-22 08:33:38 +02:00
mapping_dirty_helpers.c
mm: move tlb_flush_pending inline helpers to mm_inline.h
2022-01-15 16:30:27 +02:00
memblock.c
memblock: use kfree() to release kmalloced memblock regions
2022-02-20 08:45:39 +02:00
memcontrol.c
memcg: do not tweak node in alloc_mem_cgroup_per_node_info
2022-03-22 15:57:10 -07:00
memfd.c
memfd: fix F_SEAL_WRITE after shmem huge page allocated
2022-03-05 11:08:32 -08:00
memory_hotplug.c
drivers/base/memory: determine and store zone for single-zone memory blocks
2022-03-22 15:57:10 -07:00
memory-failure.c
mm/memory-failure.c: make non-LRU movable pages unhandlable
2022-03-22 15:57:07 -07:00
memory.c
userfaultfd: provide unmasked address on page-fault
2022-03-22 15:57:08 -07:00
mempolicy.c
mempolicy: mbind_range() set_policy() after vma_merge()
2022-03-22 15:57:09 -07:00
mempool.c
mm: remove spurious blkdev.h includes
2021-10-18 06:17:01 -06:00
memremap.c
mm/memremap: avoid calling kasan_remove_zero_shadow() for device private memory
2022-03-22 15:57:01 -07:00
memtest.c
…
migrate.c
mm: only re-generate demotion targets when a numa node changes its N_CPU state
2022-03-22 15:57:11 -07:00
mincore.c
inode: make init and permission helpers idmapped mount aware
2021-01-24 14:27:16 +01:00
mlock.c
mm/mlock: fix potential imbalanced rlimit ucounts adjustment
2022-03-22 15:57:07 -07:00
mm_init.c
include/linux/page-flags-layout.h: cleanups
2021-04-30 11:20:42 -07:00
mmap_lock.c
mm: mmap_lock: fix disabling preemption directly
2021-07-23 17:43:28 -07:00
mmap.c
mm/mmap: remove obsolete comment in ksys_mmap_pgoff
2022-03-22 15:57:05 -07:00
mmu_gather.c
mm: move tlb_flush_pending inline helpers to mm_inline.h
2022-01-15 16:30:27 +02:00
mmu_notifier.c
mm/mmu_notifiers: ensure range_end() is paired with range_start()
2021-03-25 09:22:55 -07:00
mmzone.c
mm/mmzone.c: use try_cmpxchg() in page_cpupid_xchg_last()
2022-03-22 15:57:05 -07:00
mprotect.c
memory tiering: skip to scan fast memory
2022-03-22 15:57:09 -07:00
mremap.c
mm/mremap:: use vma_lookup() instead of find_vma()
2022-03-22 15:57:05 -07:00
msync.c
mm/msync: exit early when the flags is an MS_ASYNC and start < vm_start
2021-04-30 11:20:37 -07:00
nommu.c
Merge branch 'akpm' (patches from Andrew)
2021-11-06 14:08:17 -07:00
oom_kill.c
mm/oom_kill: remove unneeded is_memcg_oom check
2022-03-22 15:57:09 -07:00
page_alloc.c
mm: make free_area_init_node aware of memory less nodes
2022-03-22 15:57:10 -07:00
page_counter.c
mm/page_counter: remove an incorrect call to propagate_protected_usage()
2022-01-15 16:30:27 +02:00
page_ext.c
mm: make some vars and functions static or __init
2022-01-15 16:30:31 +02:00
page_idle.c
mm/idle_page_tracking: make PG_idle reusable
2021-09-08 11:50:24 -07:00
page_io.c
mm: page_io: fix psi memory pressure error on cold swapins
2022-03-22 15:57:09 -07:00
page_isolation.c
Revert "mm/page_isolation: unset migratetype directly for non Buddy page"
2022-02-04 09:25:04 -08:00
page_owner.c
lib/stackdepot: allow optional init and stack_table allocation by kvmalloc()
2022-01-22 08:33:37 +02:00
page_poison.c
mm: page_poison: print page info when corruption is caught
2021-04-30 11:20:36 -07:00
page_reporting.c
mm/page_reporting: allow driver to specify reporting order
2021-06-29 10:53:47 -07:00
page_reporting.h
mm/page_reporting: export reporting order as module parameter
2021-06-29 10:53:47 -07:00
page_table_check.c
mm/page_table_check.c: use strtobool for param parsing
2022-03-22 15:57:11 -07:00
page_vma_mapped.c
mm: device exclusive memory access
2021-07-01 11:06:03 -07:00
page-writeback.c
mm/writeback: minor clean up for highmem_dirtyable_memory
2022-03-22 15:57:01 -07:00
pagewalk.c
mm: pagewalk: fix walk for hugepage tables
2021-06-29 10:53:49 -07:00
percpu-internal.h
mm: memcg/percpu: account extra objcg space to memory cgroups
2022-01-15 16:30:31 +02:00
percpu-km.c
percpu: flush tlb in pcpu_reclaim_populated()
2021-07-04 18:30:17 +00:00
percpu-stats.c
percpu: rework memcg accounting
2021-06-05 20:43:15 +00:00
percpu-vm.c
percpu: flush tlb in pcpu_reclaim_populated()
2021-07-04 18:30:17 +00:00
percpu.c
bitmap patches for 5.17-rc1
2022-01-23 06:20:44 +02:00
pgalloc-track.h
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
pgtable-generic.c
mm: move tlb_flush_pending inline helpers to mm_inline.h
2022-01-15 16:30:27 +02:00
process_vm_access.c
mm/process_vm_access.c: remove duplicate include
2021-05-05 11:27:27 -07:00
ptdump.c
mm: sparsemem: use page table lock to protect kernel pmd operations
2022-03-22 15:57:08 -07:00
readahead.c
remove inode_congested()
2022-03-22 15:57:01 -07:00
rmap.c
mm/thp: ClearPageDoubleMap in first page_add_file_rmap()
2022-03-22 15:57:11 -07:00
rodata_test.c
mm/rodata_test.c: fix missing function declaration
2020-08-21 09:52:53 -07:00
secretmem.c
mm/secretmem: avoid letting secretmem_users drop to zero
2021-10-28 17:18:55 -07:00
shmem.c
mm: shmem: fix missing cache flush in shmem_mfill_atomic_pte()
2022-03-22 15:57:04 -07:00
shuffle.c
mm: eliminate "expecting prototype" kernel-doc warnings
2021-04-16 16:10:36 -07:00
shuffle.h
mm/shuffle: fix section mismatch warning
2021-05-22 15:09:07 -10:00
slab_common.c
Merge branch 'akpm' (patches from Andrew)
2022-01-15 20:37:06 +02:00
slab.c
mm: introduce kmem_cache_alloc_lru
2022-03-22 15:57:03 -07:00
slab.h
mm: introduce kmem_cache_alloc_lru
2022-03-22 15:57:03 -07:00
slob.c
mm: introduce kmem_cache_alloc_lru
2022-03-22 15:57:03 -07:00
slub.c
mm: introduce kmem_cache_alloc_lru
2022-03-22 15:57:03 -07:00
sparse-vmemmap.c
mm: sparsemem: move vmemmap related to HugeTLB to CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
2022-03-22 15:57:08 -07:00
sparse.c
mm/sparse: make mminit_validate_memmodel_limits() static
2022-03-22 15:57:05 -07:00
swap_cgroup.c
…
swap_slots.c
treewide: Add missing includes masked by cgroup -> bpf dependency
2021-12-03 10:58:13 -08:00
swap_state.c
mm: swap: get rid of livelock in swapin readahead
2022-03-17 11:02:13 -07:00
swap.c
mm: lru_cache_disable: replace work queue synchronization with synchronize_rcu
2022-03-22 15:57:08 -07:00
swapfile.c
userfaultfd: provide unmasked address on page-fault
2022-03-22 15:57:08 -07:00
truncate.c
mm: remove cleancache
2022-01-22 08:33:38 +02:00
usercopy.c
mm/usercopy: return 1 from hardened_usercopy __setup() handler
2022-03-22 15:57:11 -07:00
userfaultfd.c
mm: userfaultfd: fix missing cache flush in mcopy_atomic_pte() and __mcopy_atomic()
2022-03-22 15:57:04 -07:00
util.c
mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls
2022-03-04 10:00:37 -08:00
vmacache.c
…
vmalloc.c
mm/vmalloc.c: fix "unused function" warning
2022-03-22 15:57:05 -07:00
vmpressure.c
mm/vmpressure: fix data-race with memcg->socket_pressure
2021-11-06 13:30:40 -07:00
vmscan.c
NUMA balancing: optimize page placement for memory tiering system
2022-03-22 15:57:09 -07:00
vmstat.c
mm: only re-generate demotion targets when a numa node changes its N_CPU state
2022-03-22 15:57:11 -07:00
workingset.c
mm: workingset: replace IRQ-off check with a lockdep assert.
2022-03-22 15:57:08 -07:00
z3fold.c
mm/z3fold: add kerneldoc fields for z3fold_pool
2021-07-01 11:06:03 -07:00
zbud.c
mm/zbud: add kerneldoc fields for zbud_pool
2021-07-01 11:06:03 -07:00
zpool.c
zpool: remove the list of pools_head
2022-01-15 16:30:31 +02:00
zsmalloc.c
zsmalloc: replace get_cpu_var with local_lock
2022-01-22 08:33:37 +02:00
zswap.c
mm/zswap.c: allow handling just same-value filled pages
2022-03-22 15:57:11 -07:00