Merge remote-tracking branch 'drm/drm-next' into msm-next-backmerge

Backmerge of drm-next, mainly to pick up dt bindings docs updates to
avoid conflicts.

Signed-off-by: Rob Clark <robin.clark@oss.q

Merge remote-tracking branch 'drm/drm-next' into msm-next-backmerge

Backmerge of drm-next, mainly to pick up dt bindings docs updates to
avoid conflicts.

Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>

show more ...

Merge tag 'mm-stable-2026-08-26-15-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull more MM updates from Andrew Morton:

- "mm/rmap: index MAP_PRIVATE file-backed folios by anonymo

Merge tag 'mm-stable-2026-08-26-15-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull more MM updates from Andrew Morton:

- "mm/rmap: index MAP_PRIVATE file-backed folios by anonymous pgoff"
(Lorenzo Stoakes)

Index MAP_PRIVATE file-backed folios by their anonymous page offset
to resolve confusion around reverse mapping for zeroed and CoW'd
file-backed memory.

Use this new VMA anonymous page offset tracking to eliminate index
conflicts and lay the foundation for scalable CoW performance
improvements.

- "promote mapped executable folios after first usage for MGLRU"
(Baolin Wang)

Make MGLRU's protection of mapped executable file folios more
reliable. Follow the classical LRU's logic, promoting mapped
executable file folios after their first usage to give executable
code a better chance to stay in memory and improve workload
performance.

- "mm: vmscan: fix node reclaim ignoring swappiness parameter" (Ridong
Chen)

Fix per-node proactive reclaim interface's ignoring the swappiness
parameter when CONFIG_MEMCG is disabled by consolidating
sc_swappiness() into a single function that checks
proactive_swappiness regardless of kernel configuration.

- "mm/vmscan: reduce lru_lock contention via vmstat-derived
scan-balance cost" (Usama Arif)

Reduce lru_lock contention in the reclaim path by deriving
scan-balance costs from vmstat counters rather than lock-acquired
producer updates.

Read and decay these cost signals on the reclaim side under a
dedicated per-lruvec lock, reducing total LRU lock wait time by over
60% without impacting scan throughput.

- "zram: fix zram issues reported by sashiko" (Sergey Senozhatsky)

Fix two low-risk zram bugs which Sashiko spotted in drive-by review.

- "Honor XA_FLAGS_ACCOUNT in xas_split_alloc() and charge to folio's
memcg" (Zi Yan)

Fix xas_split_alloc() by enabling target folio memcg charging during
splits and adding the missing __GFP_ACCOUNT flag for proper XArray
node memory accounting.

- "selftests/mm: use pattern matching in .gitignore" (Pratyush Mallick)

Replace hardcoded binary names in selftests/mm/.gitignore with a
generic pattern-matching rule to automatically ignore generated test
files and avoid manual updates when adding new tests.

- "mm/page_ext: remove pgdat_page_ext_init()" (Sang-Heon Jeon)

Make the incompatibility between FLATMEM and NUMA explicit in
mm/Kconfig and remove the unused pgdat_page_ext_init() function.

- "zram: fix zstd error paths and add parameter validation" (Haoqin
Huang)

Clean up zram compression backends by removing redundant error
cleanup, adding parameter and dictionary validation, auto-prefixing
algorithm error logs, and resetting parameters prior to
reinitialization.

- "zram: fix stale scan bounds after reinitialization" (Longlong Xia)

Prevent out-of-bounds slot accesses during concurrent zram resets by
moving table scan bound calculations under dev_lock in
writeback_store() and read_block_state().

- "add anon mTHP collapse test cases" (Baolin Wang)

Extend selftests helper functions to support arbitrary page orders
and add new test cases and options for mTHP collapse in khugepaged.

- "selftests/mm: Handle unsupported and transient test conditions"
(Muhammad Usama Anjum)

Update MM selftests to report a SKIP status instead of a failure when
required kernel or filesystem features are unsupported, while adding
retry logic for transient page migration errors.

- "mm/zswap: Fixes and improves the zswap shrink" (Hao Jia)

Fix the missing zswap global shrinker when CONFIG_MEMCG is disabled
and extend shrink_memcg() to support batch writeback for improved
writeback efficiency.

- "alloc_tag: introduce IOCTL-based filtering for MAP" (Suren
Baghdasaryan)

Introduce an IOCTL-based binary interface for memory allocation
profiling that enables kernel-side filtering before per-CPU counter
aggregation.

This eliminates the text-parsing overhead of /proc/allocinfo and
provides up to a 20x speedup by transferring only filtered allocation
data to userspace.

- "better block swap batching and a different take on swap_ops v5"
(Christoph Hellwig)

Refactor block swap I/O to use swap_iocb for batching instead of
single-bio requests and rebase the swap_ops interface, achieving
faster swap throughput during kernel builds.

- "mm: kmemleak: reduce transient false positives by confirming leaks"
(Catalin Marinas)

Reduce false-positive kmemleak reports by combining two kmemleak
enhancements that add a second confirmation scan and a configurable
minimum unreferenced scan count module parameter.

- "mm: kmemleak: default min_unref_scans to 2 for verbose kernels"
(Breno Leitao)

Auto-scanning kernels can generate false-positive memory leak reports
on single scans, so this patch defaults min_unref_scans to 2 when
CONFIG_DEBUG_KMEMLEAK_VERBOSE is enabled to require a second
confirming scan.

- "swap_ops updates" (Christoph Hellwig)

Batching I/O for synchronous swap devices causes performance
regressions and filesystem-based swap suffers from double-indirection
overhead. This series resolves both issues by reintroducing per-folio
writes for synchronous swap and allowing filesystems to directly
export their own swap_ops.

- "mm/khugepaged: several cleanups" (Nico Pache)

khugepaged accumulated redundant state-checking patterns and outdated
comments following mTHP integration. Introduce dedicated helpers for
PTE validation and event counting while refreshing the internal
documentation.

- "maple_tree: lock checking and clean ups" (Liam Howlett)

Syzbot reports incorrectly blame memory management exit paths for
locking bugs, maple tree erase operations risk allocation failures
without gfp flags and internal documentation lacks clarity.

Improve lock error detection, update docs, fix race and allocation
edge cases and optimize erase allocations using a fallback to
GFP_KERNEL | GFP_NOFAIL.

* tag 'mm-stable-2026-08-26-15-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (172 commits)
selftests/proc: make proc-maps-race work with READ_IMPLIES_EXEC
memcg: move LRU size accounting on reparenting instead of copying it
mm/vmscan: fix comment logic in balance_pgdat
maple_tree: add helper mas_make_walkable()
maple_tree: avoid extra gap calculation
maple_tree: fix argument name in header
maple_tree: change two GFP flags in tests
maple_tree: document erase and allocations better
maple_tree: avoid mas_erase() and mtree_erase() failures
maple_tree: document that erase may use GFP_KERNEL for allocations
maple_tree: catch race in mas_alloc_cyclic()
maple_tree: add bulk parent set helper
maple_tree: micro optimisation of mas_wr_store_type()
maple_tree: optimise mas_wr_node_store() when not in rcu mode
maple_tree: use prefetched value in mas_wr_store_type()
maple_tree: clarify comments on mas_nomem()
maple_tree: drop MAPLE_ALLOC_SLOTS
maple_tree: drop dead code from mas_extend_spanning_null()
maple_tree: documentation fix
maple_tree: add write lock checking with lockdep sequence numbers
...

show more ...

selftests: mm: test kmemleak's N-consecutive-scan leak confirmation

Add a functional test for the min_unref_scans kmemleak module parameter.
Using samples/kmemleak's helper module it checks that mi

selftests: mm: test kmemleak's N-consecutive-scan leak confirmation

Add a functional test for the min_unref_scans kmemleak module parameter.
Using samples/kmemleak's helper module it checks that min_unref_scans=1
reports an orphan on the first scan, min_unref_scans=2 reports nothing on
the first scan but does on the second, and that the parameter reads back
what was written.

It counts only the helper module's own orphans (matched by their
[kmemleak_test] backtrace, with the module kept loaded so the symbols
resolve) so unrelated leaks already present on the system do not perturb
the result. The test skips when run as non-root, without
CONFIG_DEBUG_KMEMLEAK / CONFIG_SAMPLE_KMEMLEAK, on a kernel without the
parameter, or when the helper yields no detectable orphan.

Link: https://lore.kernel.org/20260713-catalin_pto-v1-4-5b93b1131089@debian.org
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

show more ...

selftests/mm: rename local_config.h to local_config.h_gen

Patch series "selftests/mm: use pattern matching in .gitignore", v4.

The current selftests/mm/.gitignore hardcodes each generated test bina

selftests/mm: rename local_config.h to local_config.h_gen

Patch series "selftests/mm: use pattern matching in .gitignore", v4.

The current selftests/mm/.gitignore hardcodes each generated test binary
by name, which requires manual updates every time a new test is added.

This series switches to a pattern-matching approach (similar to KVM
selftests), ignoring everything by default and allowing specific source
extensions. To accommodate this without tracking generated headers,
local_config.h is renamed to local_config.h_gen.


This patch (of 2):

Because local_config.h is a generated build artifact, un-ignoring all .h
files in .gitignore causes it to incorrectly show up as an untracked file
in git status.

Rename it to local_config.h_gen so it no longer matches the !*.h inclusion
rule, preparing for a subsequent patch that switches .gitignore to a
pattern-matching approach.

Update Makefile, check_config.sh, and affected test sources (cow.c,
gup_longterm.c) accordingly.

Link: https://lore.kernel.org/20260803221732.3651981-1-pratmal@google.com
Link: https://lore.kernel.org/20260803221732.3651981-2-pratmal@google.com
Signed-off-by: Pratyush Mallick <pratmal@google.com>
Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Suggested-by: David Hildenbrand <david@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: "Liam R. Howlett" <liam@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Yosry Ahmed <yosry@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

show more ...

Merge tag 'kvm-riscv-7.3-1' of https://github.com/kvm-riscv/linux into HEAD

KVM/riscv changes for 7.3

- Svadu/Zicfiss/Zicfilp FWFT support for Guest
- Use try_cmpxchg for IMSIC MRIF RMW
- More arch

Merge tag 'kvm-riscv-7.3-1' of https://github.com/kvm-riscv/linux into HEAD

KVM/riscv changes for 7.3

- Svadu/Zicfiss/Zicfilp FWFT support for Guest
- Use try_cmpxchg for IMSIC MRIF RMW
- More arch-specific tracepoints in KVM RISC-V
- Eager Page Splitting for KVM RISC-V
- Optimize hfence request handling for SMP Guests
- Improve dirty log clearing by skipping zero bits in mask
- Guard HFENCE range loops against overflow
- CPU PM notifiers in KVM RISC-V for non-retentive idle states
- Fix kernel-mode vector context save/restore for Guest

show more ...

Merge tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

- "mm: drop "sub" prefix from various places" (Dev Jain)

pag

Merge tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

- "mm: drop "sub" prefix from various places" (Dev Jain)

page->folio conversion and a naming cleanup

- "mm/kasan: remove redundant initialization for kasan_flag_write_only"
(Igor Putko)

KASAN cleanup work

- "mm/filemap: reduce unnecessary xarray lookups" (Chi Zhiling)

Small speedup in the pagecaache read code

- "mm/percpu: Fix possible NOFS/NOIO reclaim recursion" (Kaitao Cheng)

Improve the vmalloc code - mainly the avoidance of GFP_KERNEL
allocations when the caller asked for GFP_NOFS or GFP_NOIO

- "mm/kmemleak: avoid soft lockup when scanning task stacks" (Breno
Leitao)

Avoid a soft lockup watchdog trigger from the kmemleak scanning code
in extreme situations

- "mm/page_owner: misc cleanups" (Ye Liu)

Cleanups to the page_owner code. For some reason lots of people have
been working on the page_owner code this cycle.

- "mm: convert to walk_page_range_vma() to eliminate find_vma()"
(Kefeng Wang)

Simplify and accelerate the page walking library function

- "mm/migrate: preparatory cleanups for batch copy and offload"
(Shivank Garg)

Cleanups in the migration code

- "mm/page_owner: add per-fd filter infrastructure for print_mode and
NUMA filtering" (Zhen Ni)

Per-fd filtering to page_owner in order to reduce the sometimes vast
amount of output it can produce

- "mm: Refactor bootmem gigantic hugepage allocation" (Muchun Song)

Fixes and preparatory cleanups around bootmem HugeTLB handling,
sparse initialization ordering, and related vmemmap setup

- "mm/zsmalloc: reduce lock contention in zs_free()" (Wenchao Hao)

Reduce lock contention in zs_free(), which dominates the unmap path
under memory pressure on Android (LMK kills) and on x86 servers
running zswap-heavy workloads.

Up to 1.83x improvement in microbenchmarking.

- "move alloc_tag.c file under mm/" (Suren Baghdasaryan)

- "samples/damon: handle damon_{start,stop}() failures" (SJ Park)

Fix improper handling of damon_start(), damon_stop(), and
damon_call() failures across DAMON sample modules to prevent
potential memory leaks, operation disruptions and use-after-free
bugs

- "mm/damon/sysfs: kobject_del() directories that users can
create/remove" (SJ Park)

Fix delayed sysfs directory removal under DEBUG_KOBJECT_RELEASE
causeing creation failures due to duplicate directory names by adding
missing kobject_del() calls before creating new directories

- "mm: cleanup clear_not_present_full_ptes()" (David Hildenbrand)

Clean up the core pte handling code

- "selftests/damon: misc fixes for test bugs" (Kunwu Chan)

Fix several bugs in the DAMON selftests

- "selftests/damon: fix memcg_path staging handling" (Cheng Nie)

Fix a bug in _damon_sysfs.py for damos_filter memcg_path setup, and
add a test case for it in sysfs.py.

- "selftests/damon: test kdamond refresh_ms" (Ruslan Valiyev)

Selftest coverage for DAMON's refresh_ms sysfs feature by updating
the test control module and verifying that scheme stats update
automatically without manual intervention

- "mm/damon: five misc fixups" (Akinobu Mita)

Miscellaneous DAMON fixups.

- "mm/damon/core: detect internal variation above max_nr_regions/2"
(Jiayuan Chen)

Fix DAMON's region splitting behavior when region counts exceed half
the maximum budget by dynamically scaling down the split fraction as
the limit approaches, preventing large regions from staying un-split,
and add corresponding KUnit test coverage

- "mm: preparatory patches for PMD level swap entries" (Usama Arif)

Refactor and clean up PMD softleaf helpers, call sites, and
architecture flags to lay the groundwork for a follow-up series that
introduces PMD page table swap entries

- "mm/damon: update, optimize, and clean up doc, tests, and code" (SJ
Park)

Update DAMON design and ABI documentation, expands unit and selftest
coverage, optimize damon_commit_target_regions(), and clean up
recently added sysfs interface code for better readability

- "mm/vmpressure: reduce CPU, memory and code overhead on cgroup v2"
(Usama Arif)

Optimize vmpressure() by skipping unnecessary work on cgroup v2 for
userspace event notifications and refactor v1-only eventfd handling
into mm/memcontrol-v1.c to reduce memory overhead and code complexity

- "selftests/mm: refactor pkey helpers and fix mmap error handling"
(Hongfu Li)

Refactor pkeys shared tracing and assertion helpers into a common
file, unify protection key selftests to use consistent diagnostic
logging and assertions, and enforce standardized MAP_FAILED return
checks for mmap() calls across the tests

- "mm/damon: optimize out nr_accesses_bp" (SJ Park)

Replace the error-prone, continuously updated nr_accesses_bp field in
damon_region with an on-demand moving sum function, reducing
structure memory overhead and avoiding state corruption bugs

- "Open HugeTLB allocation routine for more generic use" (Ackerley Tng)

Decouple HugeTLB folio allocation from VMA dependencies by
introducing hugetlb_alloc_folio(), enabling subsystems like
guest_memfd to allocate HugeTLB folios without standard VMA
reservations or pseudo-VMAs

- "mm/damon: provide pseudo moving sum probe_hits" (SJ Park)

Integrate DAMON's probe_hits attribute counter into the pseudo moving
sum infrastructure, enabling real-time, online monitoring without
waiting for full aggregation intervals

- "mm: Some cleanups for page allocator APIs" (Brendan Jackman)

Simplify and refactor the page allocator entry points and flags by
unifying allocation paths, adding internal alloc_flags arguments, and
eliminating redundant __ prefixed alloc_pages variants.

- "Fix incorrect access of hugetlb pte entries" (Dev Jain)

Enforce the consistent use of huge_ptep_get() instead of ptep_get()
for HugeTLB entries and fixes an unaligned address issue in arm64's
huge_ptep_get() implementation

- "mm/damon: validate all parameters in the core" (SJ Park)

Consolidate parameter validation into the DAMON core specifically
within damon_start() and damon_commit_ctx() to centralize error
checking, eliminate caller-side redundant checks and to improve
maintenance efficiency

- "tools/mm/page_owner_sort: fix filtering and cleanup issues" (Yichong
Chen)

Rename is_need() to filter_record() for clearer return semantics, fix
per-record allocation memory leaks and bound output copies in
search_pattern() to address an existing buffer issue

- "memcg: bail out reclaim when memcg is dying" (Jiayuan Chen)

Mitigate a system-wide stall which occurs when a cgroup is removed
while one of its memory control files is doing synchronous reclaim

- "mm/memory-failure: add panic option for unrecoverable pages" (Breno
Leitao)

Introduce an opt-in vm.panic_on_unrecoverable_memory_failure sysctl
that immediately panics the kernel on unrecoverable memory errors in
kernel-owned pages to preserve error context and prevent delayed,
silent data corruption

- "mm/damon: refactor damon_{start,stop,commit}() for simple error
handling" (SJ Park)

Refactor the DAMON core API functions to guarantee that all contexts
are fully stopped when damon_start(), damon_stop(), or damon_commit()
fail, eliminating the need for complex and error-prone caller-side
cleanup code

- "Keep tail page private zero at free and folio split" (Zi Yan)

Add checks to ensure tail_page->private is zero when freeing compound
or high-order pages and when promoting tail pages during large folio
splits. By validating these fields at free and split time, it allows
the removal of redundant private field clearing inside
prep_compound_tail()

- "mm: drop redundant lru_add_drain in anon folio reuse paths" (Barry
Song)

Eliminate redundant lru_add_drain() calls in
wp_can_reuse_anon_folio() and do_swap_page() to reduce LRU lock
contention and system overhead

By validating folio refcounts against the LRU cache before draining
and removing unnecessary drains in the swap path, it achieves up to a
30.5% reduction in drain calls during heavy swap workloads

- "mm: clean up folio LRU and swap declarations" (Jianyue Wu)

Reorganize folio LRU and swap code by relocating page-cluster state
to mm/swap_state.c, renaming mm/swap.c to mm/folio.c, and moving
MM-internal reclaim declarations into mm/internal.h.

- "userfaultfd: working set tracking for VM guest memory" (Kiryl
Shutsemau)

Add userfaultfd support for tracking the working set of VM guest
memory, so a VMM can identify hot pages and reclaim cold ones to
tiered or remote storage

- "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 2)" (David
Hildenbrand)

Remove the remaining pieces of CONFIG_HAVE_BOOTMEM_INFO_NODE,
performing some smaller cleanups around freeing of reserved vmemmap
pages on the way.

- "mm/damon: update probe hits for runtime parameter commits" (SJ Park)

Ensure that DAMON's probe_hits attribute counter is properly updated
when monitoring intervals are changed at runtime, matching the
behavior of nr_accesses. To achieve this, it refactors and renames
existing helper functions for shared use, applies the updates to
probe_hits, and handles edge cases in damon_probe_hits_mvsum() to
maintain measurement accuracy.

- "KSM: performance optimizations for rmap_walk_ksm" (xu xin)

Resolve a severe KSM reverse-mapping performance bottleneck where
thousands of split VMAs sharing a single anon_vma cause extended lock
contention.

By adding an interval-filtering check during the rmap walk, it
reduces worst-case anon_vma lock hold times from over 500ms down to
under 2ms, preventing application freezes and latency spikes under
memory pressure.

- "mm: split a couple of headers from internal.h" (Mike Rapoport)

Split declarations related to mm_init, memblock, vmalloc and sparse
into new headers

- "KSM: use linear_page_index in collect_procs_ksm()" (xu xin)

Apply the interval tree optimization from rmap_walk_ksm() to
collect_procs_ksm() to avoid iterating over non-matching VMAs during
KSM memory error handling.

It hoists loop-invariant address initialization and restricts the
anon_vma_interval_tree_foreach walk to a targeted page offset range,
reducing redundant checks and improving lookup efficiency.

- "selftests/mm: avoid false failures in hugetlb and KSM tests" (Sayali
Patil)

Fix issues in the hugetlb and KSM MM selftest categories that can
report failures when the prerequisites for the tests are not
satisfied

- "mm/damon: introduce data attributes only monitoring" (SJ Park)

Introduce attribute-weighted region management in DAMON, allowing
users to prioritize specific data attributes (such as page sizes or
cgroups) over or instead of access monitoring.

By assigning weights to attribute probes, DAMON can completely
disable access tracking and adjust monitoring regions based on
weighted probe-hit counters to optimize monitoring quality for
attribute-focused workloads.

- "mm/hmm: Add mmap lock-drop support for userfaultfd-backed mappings"
(Stanislav Kinsburskii)

Extend hmm_range_fault() to support userfaultfd-backed regions by
allowing the mmap lock to be dropped during fault handling via a new
hmm_range_fault_locked() helper.

By accepting a locked pointer and signaling retry status when lock
release occurs, it enables page fault resolution in userfaultfd
regions while preserving backward compatibility for existing callers.

- "mm: make VMA page offset handling more consistent" (Lorenzo Stoakes)

Clean up and standardize how vma->vm_pgoff is accessed and
manipulated across file-backed and anonymous mappings in the kernel

It introduces dedicated helper functions such as vma_start_pgoff(),
vma_end_pgoff(), vma_set_pgoff() and linear_page_delta() while
renaming rmap interval tree helpers to better reflect their
functionality.

These changes establish a cleaner foundation for future work that
will unify virtual page offset indexing for all anonymous and CoW'd
folios.

- "mm: handle device-private PMDs in walk callbacks" (Usama Arif)

Address kernel panics and state corruption caused by MM walk
callbacks reaching non-present device-private PMD swap entries
created during HMM migrations

It ensures that functions which acquire pmd_trans_huge_lock()
properly recognize device-private PMDs instead of assuming a present
THP or a standard migration entry.

- "mm/rmap: Refactor try_to_unmap_one" (Dev Jain)

Refactor try_to_unmap_one by modularizing Hugetlb,
anonymous-lazyfree, and anonymous-swapbacked logic into dedicated
functions, laying the structural groundwork for batched anonymous
large folio unmapping.

- "Docs/ABI/damon: sysfs ABI document fixes and additions" (Song Hu)

Fix typos and fills in missing entries in the DAMON sysfs ABI
document

- "dax/kmem: atomic whole-device hotplug via sysfs" (Gregory Price)

Introduce an atomic sysfs state attribute and supporting DAX/MM
infrastructure to prevent userland races when offlining and removing
entire memory regions

By adding an unplugged state alongside standard online modes, it
enables whole-device atomic hotplug control while preserving backward
compatibility.

- "mm: convert more vm_flags_t users to vma_flags_t" (Lorenzo Stoakes)

Continue transitioning the kernel from the deprecated vm_flags_t type
to vma_flags_t across core memory management infrastructure.

It replaces legacy type usage in core functions such as do_mmap(),
unmapped area allocation, mm->def_vma_flags, and VMA operations like
mlock, mprotect, and mremap.

- "Two small patches to clean up mm/mm_slot.h" (xu xin)

Refactor mm_slot.h by introducing mm_slot_remove() to unify duplicate
slot deletion sequences in khugepaged and KSM. It also adds code
documentation explaining why mm_slot_lookup and mm_slot_insert must
remain as preprocessor macros rather than static inline functions.

- "mm/damon/core: hide core-private struct fields" (SJ Park)

Clean up DAMON core structures by consistently marking internal-only
fields with private: comment tags to prevent improper direct access
from outer layers.

It enforces encapsulation across core structures including
damon_region, damon_target, and damon_ctx and updates DAMON_SYSFS to
interact through approved access APIs instead of exposing raw struct
members.

- "mm/damon: unurgent fixes for infinite loop, NULL de-ref and races"
(SJ Park)

Address potential infinite loops, NULL dereferences, and race
conditions identified in DAMON

It fixes an infinite loop triggered by extreme user configurations, a
NULL pointer dereference within unit tests and minor monitoring
accuracy degradation caused by subtle runtime races.

- "mm/page_alloc: fixes for free_pages_nolock() on RT/UP" (Brendan
Jackman)

Fix an NMI safety flaw in __free_frozen_pages() where freeing pages
on non-SMP or PREEMPT_RT kernels can bypass can_spin_trylock() checks
via non-PCP or isolated migration paths.

It also resolves potential kernel crashes and privilege escalation
risks triggered when BPF tracing runs in NMI context alongside memory
hotplug or large allocation frees.

- "mm/page_alloc: couple of followups for recent cleanups" (Brendan
Jackman)

Clean up and update page allocator nomenclature, documentation, and
debug assertions.

It aligns internal FPI_ flags with the public "nolock" naming
convention, removes outdated internal implementation details from
high-level page allocator comments, and eliminates obsolete
VM_BUG_ON() assertions in allocation paths.

- "mm/mseal: further cleanups" (Lorenzo Stoakes)

Refactor and simplify the mseal implementation by clarifying API
boundaries and removing unnecessary code complexity.

It replaces generic do_mseal() usage outside the syscall with a
dedicated mseal_mmap_page_zero() helper for MMAP_PAGE_ZERO,
eliminates mm_struct parameters to enforce that sealing applies only
to current->mm, and streamlines overall logic and comments with no
functional changes intended.

- "mm/vmscan: fix swappiness=max and clean up per-node proactive
reclaim" (Ridong Chen)

Resolve reclaim behavior bugs and clean up function parameters across
memory reclaim paths

It fixes swappiness=max in both standard reclaim and MGLRU so
unswappable anonymous memory no longer falls back to evicting page
cache, ensures reclaim_store() returns accurate error codes instead
of collapsing all failures into -EAGAIN, and removes the obsolete
gfp_mask parameter from __node_reclaim().

- "mm: mincore: misc cleanups" (Kefeng Wang)

Clean up and simplifies the mincore code. Most importantly, it
removes the historical special behavior that always reports VM_PFNMAP
pages as non-resident.

- "mm/huge_memory: drop dead split helper variants" (Kiryl Shutsemau)

Two trivial cleanups in the folio split API

- "mm/damon: fix uninitialized DAMOS field and kunit exec expectation
bugs" (SJ Park)

Resolve minor operational and testing bugs in DAMON identified by
Sashiko. It initializes the damos->last_applied field to prevent
occasional efficiency degradation and fixes invalid memory accesses
in DAMON KUnit tests during test failure handling.

- "cleanup for stable_page_flags()" (Jinjiang Tu)

Clean up and refactor stable_page_flags() used by /proc/kpageflags
without altering functionality.

It uses BIT_ULL() to prevent shift-overflow warnings on 64-bit flag
bits, converts folio-specific flag checks to standard folio_test_*()
helpers, and removes redundant CONFIG_PAGE_IDLE_FLAG handling.

- "Batch unmap of uffd-wp file folios" (Dev Jain)

Extend batched folio unmapping support to file folios within
userfaultfd write-protect (uffd-wp) VMAs by adding batching
capabilities to pte_install_uffd_wp_if_needed().

This removes special-case restrictions on uffd-wp VMAs in
try_to_unmap_one(), significantly simplifying the function's control
flow and complexity.

- "mm/early_ioremap: clarify and clean up early_ioremap_reset()"
(Sang-Heon Jeon)

Clarify and clean up the architecture-specific usage of
__late_set_fixmap() and __late_clear_fixmap() after
early_ioremap_reset()

It adds explicit documentation regarding when early_ioremap_reset()
must be called and removes redundant macro definitions and reset
calls in the RISC-V and ARM64 architectures.

- "mm: fix reclaim storms in defrag_mode" (Johannes Weiner)

Address severe performance regressions, swap storms, and spurious
OOMs caused by vm.defrag_mode=1 under high memory pressure in Meta
production

It updates the page allocator slowpath so non-movable allocation
requests actively trigger direct reclaim and direct compaction at
pageblock_order scale, allowing them to claim whole pageblocks rather
than spinning unproductively.

- "zram: lockmap tweaks" (Sebastian Siewior)

Optimize and fix lockdep tracking for zram devices by consolidating
per-entry lockmaps and isolate lock classes across multiple instances

This reduces memory overhead by replacing per-entry lockdep_map
instances with a single map per struct zram, and assigns a dynamic
lock_class_key to each instance to prevent false deadlock reports
when different zram devices are backed by distinct filesystems.

* tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (501 commits)
selftests/mm: thuge-gen: fix test_shmget() for PAGE_SIZE check
selftests/mm: unpoison pages in memory-failure teardown
mm/shmem: downgrade final i_blocks check in shmem_evict_inode() to pr_warn()
mm/khugepaged: replace mutex_lock/mutex_unlock usage with guard macro
mm/zsmalloc: fix release order of locks in zs_page_migrate()
Documentation: zram: remove sections numbering
ksm: stop iterating VMAs when ksm_test_exit returns true
mm: fold userfaultfd_rwp() to false without CONFIG_ARCH_HAS_PTE_PROTNONE
mm/migrate: report RCU-tasks quiescent states in migrate_pages_batch()
zram: use a custom key for each zram object
zram: move lockmap to be per-zram instead per table
selftests/mm: fix gup_longterm EINVAL error message
mm: page_alloc: fix non-movable reclaim storm in defrag_mode
mm: page_alloc: move capture_control to the page allocator
mm: compaction: support non-movable compaction for pageblock requests
mm: page_alloc: __GFP_FS lockdep annotation for direct compaction
hugetlb: evaluate subpool free state while locked
mm/damon: remove trailing semicolons after function definitions
mm/damon/ops-common: prevent migration fallback to non-target nodes
mm/damon: update outdated comment about DAMOS filter handling
...

show more ...

selftests/mm: remove obsolete hugetlb vmemmap test

The hugetlb vmemmap selftest was added to check the old HVO layout where
tail vmemmap pages reused the head page. That assumption no longer
matche

selftests/mm: remove obsolete hugetlb vmemmap test

The hugetlb vmemmap selftest was added to check the old HVO layout where
tail vmemmap pages reused the head page. That assumption no longer
matches the current HVO mapping layout.

HVO now keeps a private backing page for the head vmemmap page and remaps
redundant tail vmemmap pages to a shared read-only backing page. The old
page flag check is therefore testing an obsolete implementation detail
rather than the current ABI or behavior.

Remove the stale test and its build and run entries.

[akpm@linux-foundation.org: don't clean old executables out of .gitignore]
Link: https://lore.kernel.org/CAHk-=wiHK5_oBUdUiNAaevmN9f-ORe+QBqbRefAZaw-RbgEn3w@mail.gmail.com
Link: https://lore.kernel.org/20260710092427.3459121-1-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: SJ Park <sj@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

show more ...

Merge drm/drm-next into drm-xe-next

Sync some i915/display changes

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge drm/drm-next into drm-intel-next

Sync with v7.2-rc1.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge drm/drm-next into drm-misc-next

Backmerging to get drm-misc-next to v7.2-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge tag 'v7.2-rc1' into drm-rust-next

Merge v7.2-rc1 into drm-rust-next to start the next cycle.

Devres now requires T: 'static, which conflicts with shmem::Object using
Devres<SGTableMap<T, C>>

Merge tag 'v7.2-rc1' into drm-rust-next

Merge v7.2-rc1 into drm-rust-next to start the next cycle.

Devres now requires T: 'static, which conflicts with shmem::Object using
Devres<SGTableMap<T, C>> without that bound. Resolve by adding 'static
as a supertrait to DriverObject and DeviceContext, which does not
restrict any current use cases since DriverObject is always implemented
on owned, refcounted types and DeviceContext is a sealed marker trait
with only unit-type implementors.

If DriverObject (or DeviceContext) ever becomes lifetime-parameterized
(e.g. via a GAT for TTM backed objects), the 'static supertrait can be
relaxed at that point.

Signed-off-by: Danilo Krummrich <dakr@kernel.org>

show more ...

Merge branch 'for-7.3/steam' into for-linus

- initial support for 2026 Steam Controller (Vicki Pfau)
- support for sensor events on the 2025 Steam Controller (Vicki Pfau)
- assorted fixes, improveme

Merge branch 'for-7.3/steam' into for-linus

- initial support for 2026 Steam Controller (Vicki Pfau)
- support for sensor events on the 2025 Steam Controller (Vicki Pfau)
- assorted fixes, improvements and code refactoring (Vicki Pfau)

show more ...

Merge tag 'timers-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/daniel.lezcano/linux into timers/clocksource

- Use designated initializers for sh_mtu2, sh_cmt, and sh_tmu, and
dro

Merge tag 'timers-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/daniel.lezcano/linux into timers/clocksource

- Use designated initializers for sh_mtu2, sh_cmt, and sh_tmu, and
drop the unused initializer in the platform_device_id table for
sh_mtu2 (Uwe Kleine-König)

- Remove redundant dev_err()/dev_err_probe() messages when
devm_request_*_irq() fails, as the helper already logs an error
message (Pan Chuang)

- Fix a boot hang on Allwinner D1 when a forced minimum delta is used
with the sun4i timer (Felix Yan)

- Fix an IRQ leak in the cpuhp_setup_state() error path by freeing the
IRQ on failure in the NXP PIT driver (WenTao Liang)

- Fix incorrect unmapping of shared MMIO between the clocksource and
clockevent drivers. If one of them fails to initialize, the error
path unmaps the shared MMIO region, leaving the other driver with an
invalid mapping on clps711x (Guangshuo Li)

- Make the samsung_pwm driver compatible with PREEMPT_RT by replacing
regular spinlocks with raw_spinlock_t in atomic contexts (Marek
Szyprowski)

- Use __raw_readl() and __raw_writel() instead of ioread32() and
iowrite32() to support SWAP_IO_SPACE in the rtl-otto driver (Rustam
Adilov)

- Fix a missing clk_disable_unprepare() call in the timer
initialization error path of the Armada driver (Yuho Choi)

Link: https://lore.kernel.org/lkml/75feea31-683d-45a1-87f4-ab045e0152ae@oss.qualcomm.com

show more ...

Merge branch 'next' into for-linus

Prepare input updates for 7.3 merge window.

Merge tag 'v7.2-rc3' into next

Sync up with mainline to pull in stable fixes to avoid merge conflicts.

Merge drm/drm-fixes into drm-misc-fixes

Pull in tag v7.2-rc1 so that drm-misc-fixes becomes useful again,
and drm-misc-next-fixes can be closed.

Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>

Merge tag 'mm-stable-2026-06-23-08-55' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull more MM updates from Andrew Morton:

- "khugepaged: add mTHP collapse support" (Nico Pache)

Merge tag 'mm-stable-2026-06-23-08-55' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull more MM updates from Andrew Morton:

- "khugepaged: add mTHP collapse support" (Nico Pache)

Provide khugepaged with the capability to collapse anonymous memory
regions to mTHPs

- "Remove CONFIG_READ_ONLY_THP_FOR_FS and enable file THP for writable
files" (Zi Yan)

Remove the READ_ONLY_THP_FOR_FS check in file_thp_enabled(), so that
khugepaged and MADV_COLLAPSE can run on filesystems with PMD THP
pagecache support even without READ_ONLY_THP_FOR_FS enabled

- "make MM selftests more CI friendly" (Mike Rapoport)

General fixes and cleanups to the MM selftests. Also move more MM
selftests under the kselftest framework, making them more amenable to
ongoing CI testing

- "selftests/mm: fix failures and robustness improvements" and
"selftests/mm: assorted fixes for hmm-tests" (Sayali Patil)

Fix several issues in MM selftests which were revealed by powerpc 64k
pagesize

* tag 'mm-stable-2026-06-23-08-55' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (118 commits)
Revert "mm: limit filemap_fault readahead to VMA boundaries"
mm/vmscan: pass NULL to trace vmscan node reclaim
mm: use mapping_mapped to simplify the code
selftests/mm: fix exclusive_cow test fork() handling
selftests/mm: remove hardcoded THP sizing assumptions in hmm tests
selftests/mm: allow PUD-level entries in compound testcase of hmm tests
mm/gup_test: reject wrapped user ranges
mm/page_frag: reject invalid CPUs in page_frag_test
mm/damon/core: always put unsuccessfully committed target pids
mm: page_isolation: avoid unsafe folio reads while scanning compound pages
mm/shrinker: do not hold RCU lock in shrinker_debugfs_count_show()
selftests: mm: fix and speedup "droppable" test
mm: merge writeout into pageout
MAINTAINERS: add Hao Ge as reviewer for codetag and alloc_tag
selftests/mm: clarify alternate unmapping in compaction_test
selftests/mm: move hwpoison setup into run_test() and silence modprobe output for memory-failure category
selftests/mm: skip uffd-stress test when nr_pages_per_cpu is zero
selftests/mm: skip uffd-wp-mremap if UFFD write-protect is unsupported
selftests/mm: ensure destination is hugetlb-backed in hugetlb-mremap
selftest/mm: register existing mapping with userfaultfd in hugetlb-mremap
...

show more ...

Merge branch 'next' into for-linus

Prepare input updates for 7.2 merge window.

selftests/mm: rename thp_settings.[ch] to hugepage_settings.[ch]

... for upcoming addition of HugeTLB helpers.

Link: https://lore.kernel.org/20260511162840.375890-24-rppt@kernel.org
Signed-off-by:

selftests/mm: rename thp_settings.[ch] to hugepage_settings.[ch]

... for upcoming addition of HugeTLB helpers.

Link: https://lore.kernel.org/20260511162840.375890-24-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Tested-by: Luiz Capitulino <luizcap@redhat.com>
Tested-by: Sarthak Sharma <sarthak.sharma@arm.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Donet Tom <donettom@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Liam Howlett <liam@infradead.org>
Cc: Li Wang <li.wang@linux.dev>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

show more ...

selftests/mm: rename hugepage-* tests to hugetlb-*

hugepage could mean both THP and HugeTLB these days.

Rename hugepage-* tests for HugeTLB to hugetlb-* to avoid confusion.

Make sure that Makefile

selftests/mm: rename hugepage-* tests to hugetlb-*

hugepage could mean both THP and HugeTLB these days.

Rename hugepage-* tests for HugeTLB to hugetlb-* to avoid confusion.

Make sure that Makefile update keeps alphabetical ordering of the
TEST_GEN_FILES entries.

Keep old binary names in .gitignore because Linus prefers it this way.

Link: https://lore.kernel.org/20260511162840.375890-8-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Donet Tom <donettom@linux.ibm.com>
Reviewed-by: Li Wang <li.wang@linux.dev>
Tested-by: Sarthak Sharma <sarthak.sharma@arm.com>
Tested-by: Luiz Capitulino <luizcap@redhat.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Liam Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

show more ...

selftests/mm: merge map_hugetlb into hugepage-mmap

Both tests create a hugettlb mapping, fill it with data and verify the
data, the only difference is that one uses file-backed memory and another
on

selftests/mm: merge map_hugetlb into hugepage-mmap

Both tests create a hugettlb mapping, fill it with data and verify the
data, the only difference is that one uses file-backed memory and another
one uses anonymous memory.

Merge both tests into a single file.

Link: https://lore.kernel.org/20260511162840.375890-7-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Luiz Capitulino <luizcap@redhat.com>
Reviewed-by: Donet Tom <donettom@linux.ibm.com>
Tested-by: Luiz Capitulino <luizcap@redhat.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Liam Howlett <liam@infradead.org>
Cc: Li Wang <li.wang@linux.dev>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Sarthak Sharma <sarthak.sharma@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

show more ...

Merge tag 'mm-stable-2026-06-18-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

- "selftests/mm: clean up build output and verbosity" (Li Wang)

Merge tag 'mm-stable-2026-06-18-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

- "selftests/mm: clean up build output and verbosity" (Li Wang)

Remove some noise from the MM selftests build

- "mm: Free contiguous order-0 pages efficiently" (Ryan Roberts)

Speed up the freeing of a batch of 0-order pages by first scanning
them for coalescing opportunities. This is applicable to vfree() and
to the releasing of frozen pages

- "mm/damon: introduce DAMOS failed region quota charge ratio"
(SeongJae Park)

Address a DAMOS usability issue: The DAMOS quota often exhausts
prematurely because it charges for all memory attempted, causing slow
and inconsistent performance when actions fail on unreclaimable
memory.

To fix this, a new feature lets users set a smaller, flexible quota
charge ratio (via a numerator and denominator) for failed regions.
Since failed actions cause less overhead, reducing their quota cost
ensures more predictable and efficient DAMOS processing

- "selftests/cgroup: improve zswap tests robustness and support large
page sizes" (Li Wang)

Fix various spurious failures and improves the overall robustness of
the cgroup zswap selftests

- "fix MAP_DROPPABLE not supported errno" (Anthony Yznaga)

Fix an issue in the mlock selftests on arm32

- "mm: huge_memory: clean up defrag sysfs with shared" (Breno Leitao)

Some maintenance work in the huge_memory code

- "treewide: fixup gfp_t printks" (Brendan Jackman)

Use the special vprintf() gfp_t conversion in various places

- "mm: Fix vmemmap optimization accounting and initialization" (Muchun
Song)

Fix several bugs in the vmemmap optimization, mainly around incorrect
page accounting and memmap initialization in the DAX and memory
hotplug paths. It also fixes pageblock migratetype initialization and
struct page initialization for ZONE_DEVICE compound pages

- "mm/damon: repost non-hotfix reviewed patches in damon/next tree"

A sprinkle of unrelated minor bugfixes for DAMON

- "mm: remove page_mapped()" (David Hildenbrand)

Remove this function from the tree, replacing it with folio_mapped()

- "mm/damon: let DAMON be paused and resumed" (SeongJae Park)

Allow DAMON to be paused and resumed without losing its current state

- "kasan: hw_tags: Disable tagging for stack and page-tables" (Muhammad
Usama Anjum)

Simplify and speed up kasan by removing its ineffective tagging of
stacks and page tables

- "mm/damon/reclaim,lru_sort: monitor all system rams by default"
(SeongJae Park)

Simplify deployment on diverse hardware like NUMA systems by updating
DAMON_RECLAIM and DAMON_LRU_SORT to automatically monitor the
physical address range covering all System RAM areas by default,
replacing the overly restrictive behavior that only targeted the
single largest memory block to save on negligible overhead

- "mm/damon/sysfs: document filters/ directory as deprecated" (SeongJae
Park)

Update some DAMON docs

- "mm: use spinlock guards for zone lock" (Dmitry Ilvokhin)

Switch zone->lock handling over to using the guard() mechanisms

- "mm/filemap: tighten mmap_miss hit accounting" (fujunjie)

Fix a flaw where the mmap_miss counter over-credited page cache hits
during fault-arounds and page-fault retries. This results in
significant reduction of redundant synchronous mmap readahead I/O,
drastically cutting down execution time and gigabytes read for sparse
random or strided memory access workloads

- "selftests/cgroup: Fix false positive failures in test_percpu_basic"
(Li Wang)

Fix a couple of false-positives in the cgroup kmem selftests

- "mm/damon/reclaim: support monitoring intervals auto-tuning"
(SeongJae Park)

Add a new parameter to DAMON permitting DAMON_RECLAIM to
automatically tune DAMON's sampling and aggregation intervals

- "mm/damon/stat: add kdamond_pid parameter" (SeongJae Park)

Change DAMON_STAT to provide the pid of its kdamond

- "mm/kmemleak: dedupe verbose scan output" (Breno Leitao)

Remove large amounts of duplicated backtraces from the verbose-mode
kmemleak output

- "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 1)" (David
Hildenbrand)

Reduce our use of CONFIG_HAVE_BOOTMEM_INFO_NODE, with a view to
removing it entirely in a later series

- "mm/damon: validate min_region_size to be power of 2" (Liew Rui Yan)

Prevent users from passing a non-power-of-2 value of `addr_unit', as
this later results in undesirable behavior

- "mm: document read_pages and simplify usage" (Frederick Mayle)

- "tools/mm/page-types: Fix misc bugs" (Ye Liu)

Fix three issues in tools/mm/page-types.c

- "mm: misc cleanups from __GFP_UNMAPPED series" (Brendan Jackman)

Implement several cleanups in the page allocator and related code

- "mm, swap: swap table phase IV: unify allocation" (Kairui Song)

Unify the allocation and charging of anon and shmem swap in folios,
provides better synchronization, consolidates the metadata
management, hence dropping the static array and map, and improves
performance

- "mm/damon: introduce data attributes monitoring" (SeongJae Park(

Extend DAMON to monitor general data attributes other than accesses

- "mm/vmalloc: free unused pages on vrealloc() shrink" (Shivam Kalra)

Implement the TODO in vrealloc() to unmap and free unused pages when
shrinking across a page boundary

- "mm/damon: documentation and comment fixes" (niecheng)

- "remove mmap_action success, error hooks" (Lorenzo Stoakes)

Eliminate custom hooks from mmap_action by removing the problematic
success_hook which allowed drivers to improperly access uninitialized
VMAs. It replaces the error_hook with a simple error-code field and
updates the memory char driver accordingly

- "mm/damon: minor improvements for code readability and tests"
(SeongJae Park)

- "mm/damon: fix macro arguments and clarify quota goals doc" (Maksym
Shcherba)

- "userfaultfd: merge fs/userfaultfd.c into mm/userfaultfd.c" (Mike
Rapoport)

- "mm/mglru: improve reclaim loop and dirty folio" (Kairui Song and
others)

Clean up and slightly improves MGLRU's reclaim loop and dirty
writeback handling. Large performance improvements are measured

- "use vma locks for proc/pid/{smaps|numa_maps} reads" (Suren
Baghdasaryan)

Use per-vma locks when reading /proc/pid/smaps and numa_maps similar
to reduce contention on central mmap_lock

- "refactors thpsize_shmem_enabled_store() and thpsize_shmem_enabled_show()"
(Ran Xiaokai)

Some cleanup work in the THP code

- "selftests/memfd: fix compilation warnings" (Konstantin Khorenko)

Fix a few build glitches in the memfd selftest code.

- "memcg: shrink obj_stock_pcp and cache multiple objcgs" (Shakeel
Butt)

Resolve a 68% performance regression caused by NUMA-node cache
thrashing around struct obj_stock_pcp by shrinking its existing
fields and expanding it into a multi-slot array that caches up to
five obj_cgroup pointers per CPU, allowing per-node variants of the
same memcg to coexist within a single 64-byte cache line.

- "zram: writeback fixes" (Sergey Senozhatsky)

address a couple of unrelated zram writeback issues

- "mm: switch THP shrinker to list_lru" (Johannes Weiner)

Resolve NUMA-awareness issues and streamlines callsite interaction by
refactoring and extending the list_lru API to completely replace the
complex, open-coded deferred split queue for Transparent Huge Pages

- "mm: improve large folio readahead for exec memory" (Usama Arif)

Improve large-folio readahead on systems like 64K-page arm64 by
preventing the mmap_miss check from permanently disabling
target-oriented VM_EXEC readahead, and by generalizing the
force_thp_readahead gate to support mappings with any usefully large
maximum folio order under the cache cap.

- "userfaultfd/pagemap: pre-existing fixes" (Kiryl Shutsemau)

Fix a bunch of minor issues in the userfaultfd/pagemap, all of which
were flagged by Sashiko review of proposed new material

- "mm/sparse-vmemmap: Provide generic vmemmap_set_pmd() and
vmemmap_check_pmd()" (Muchun Song)

Provide generic versions of these two functions so the four
arch-specific implementations can be removed.

- "mm/swap, PM: hibernate: fix swapoff race in uswsusp by pinning swap
device" (Youngjun Park)

Address a uswsusp-vs-swapoff race and reduces the swap device
reference taking/releasing frequency.

- "mm/hmm: A fix and a selftest" (Dev Jain)

* tag 'mm-stable-2026-06-18-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (321 commits)
selftests/mm/hmm-tests: test pagemap reads of PMD device-private entries
fs/proc/task_mmu: do not warn on seeing non-migration pmd entry
lib/test_hmm: check alloc_page_vma() return value and handle OOM
mm/compaction: cap compact_gap() at COMPACT_CLUSTER_MAX
mm/swap: remove redundant swap device reference in alloc/free
mm/swap, PM: hibernate: fix swapoff race in uswsusp by pinning swap device
mm/filemap: use folio_next_index() for start
vmalloc: fix NULL pointer dereference in is_vm_area_hugepages()
sparc/mm: drop vmemmap_check_pmd helper and use generic code
loongarch/mm: drop vmemmap_check_pmd helper and use generic code
riscv/mm: drop vmemmap_pmd helpers and use generic code
arm64/mm: drop vmemmap_pmd helpers and use generic code
mm/sparse-vmemmap: provide generic vmemmap_set_pmd() and vmemmap_check_pmd()
rust: page: mark Page::nid as inline
userfaultfd: build __VMA_UFFD_FLAGS from config-gated masks
userfaultfd: gate must_wait writability check on pte_present()
mm/huge_memory: preserve pmd_swp_uffd_wp on device-private PMD downgrade
fs/proc/task_mmu: fix hugetlb self-deadlock in pagemap_scan_pte_hole()
fs/proc/task_mmu: use huge_page_size() in pagemap_scan_hugetlb_entry()
fs/proc/task_mmu: fix make_uffd_wp_huge_pte() prot-update race
...

show more ...

Merge tag 'v7.1-rc6' into next

Sync up with mainline to pull in a fix to IMS PCU driver and other
enhancements.

selftests/mm: add kmemleak verbose dedup test

Add a regression test for the per-scan verbose dedup added in the
preceding commit. The test loads samples/kmemleak's helper module
(CONFIG_SAMPLE_KMEM

selftests/mm: add kmemleak verbose dedup test

Add a regression test for the per-scan verbose dedup added in the
preceding commit. The test loads samples/kmemleak's helper module
(CONFIG_SAMPLE_KMEMLEAK=m) to generate orphan allocations, several of
which share an allocation backtrace, runs four kmemleak scans with verbose
printing enabled, then walks dmesg looking for two "unreferenced object"
reports within a single scan that share an identical backtrace - which
would mean dedup failed to collapse them.

The test is intentionally permissive on detection but strict on
regressions:

- PASS when no duplicates are observed, regardless of whether the
dedup summary line ("... and N more object(s) with the same
backtrace") was actually emitted. Per-CPU chunk reuse, slab
freelist pointers, kernel stack residue and CONFIG_DEBUG_KMEMLEAK_
AUTO_SCAN can all keep most of the orphans "still referenced" or
reported across many separate scans, so the dedup path may have
nothing to fold within one scan. That is not a regression.

- PASS reports whether dedup actually fired, so a passing run on a
well-behaved environment is still informative.

- FAIL when two same-backtrace reports land in a single scan (clear
dedup regression).

- FAIL when kmemleak's own per-scan tally counts leaks but the
verbose path emits zero "unreferenced object" lines - that catches
a regression in the verbose printer itself, which would otherwise
pass the duplicate check trivially.

- SKIP when kmemleak is absent, disabled at runtime, or the helper
module is not built.

The dmesg parser anchors stack-frame matching to the indentation kmemleak
uses for them (4+ spaces under "kmemleak: ") so unrelated kmemleak
warnings landing between reports do not get lumped into the backtrace key
and mask a duplicate.

Link: https://lore.kernel.org/20260506-kmemleak_dedup-v3-2-2d36aafc34da@debian.org
Signed-off-by: Breno Leitao <leitao@debian.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

show more ...

selftests/mm: suppress compiler error in liburing check

When building the mm selftests on a system without liburing development
headers, check_config.sh leaks a raw compiler error:

/tmp/tmp.kIIOI

selftests/mm: suppress compiler error in liburing check

When building the mm selftests on a system without liburing development
headers, check_config.sh leaks a raw compiler error:

/tmp/tmp.kIIOIqwe3n.c:2:10: fatal error: liburing.h: No such file or directory
2 | #include <liburing.h>
| ^~~~~~~~~~~~

Since this is an expected failure during the configuration probe,
redirect the compiler output to /dev/null to hide it.

And the build system prints a clear warning when this occurs:

Warning: missing liburing support. Some tests will be skipped.

Because the user is properly notified about the missing dependency, the
raw compiler error is redundant and only confuse users.

Additionally, update the Makefile to use $(Q) and $(call msg,...) for the
check_config.sh execution. This aligns the probe with standard kbuild
output formatting, providing a clean "CHK" message instead of printing the
raw command during the build.

Link: https://lore.kernel.org/20260422080446.26020-3-wangli.ahau@gmail.com
Signed-off-by: Li Wang <wangli.ahau@gmail.com>
Tested-by: David Hildenbrand (Arm) <david@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

show more ...