Merge tag 'mm-stable-2026-02-11-19-22' of git://git.kernel.org/pub/scm/linux/kernel...

Pull MM updates from Andrew Morton:

 - "powerpc/64s: do not re-activate batched TLB flush" makes
   arch_{enter|leave}_lazy_mmu_mode() nest properly (Alexander Gordeev)

   It adds a generic enter/leave layer and switches architectures to use
   it. Various hacks were removed in the process.

 - "zram: introduce compressed data writeback" implements data
   compression for zram writeback (Richard Chang and Sergey Senozhatsky)

 - "mm: folio_zero_user: clear page ranges" adds clearing of contiguous
   page ranges for hugepages. Large improvements during demand faulting
   are demonstrated (David Hildenbrand)

 - "memcg cleanups" tidies up some memcg code (Chen Ridong)

 - "mm/damon: introduce {,max_}nr_snapshots and tracepoint for damos
   stats" improves DAMOS stat's provided information, deterministic
   control, and readability (SeongJae Park)

 - "selftests/mm: hugetlb cgroup charging: robustness fixes" fixes a few
   issues in the hugetlb cgroup charging selftests (Li Wang)

 - "Fix va_high_addr_switch.sh test failure - again" addresses several
   issues in the va_high_addr_switch test (Chunyu Hu)

 - "mm/damon/tests/core-kunit: extend existing test scenarios" improves
   the KUnit test coverage for DAMON (Shu Anzai)

 - "mm/khugepaged: fix dirty page handling for MADV_COLLAPSE" fixes a
   glitch in khugepaged which was causing madvise(MADV_COLLAPSE) to
   transiently return -EAGAIN (Shivank Garg)

 - "arch, mm: consolidate hugetlb early reservation" reworks and
   consolidates a pile of straggly code related to reservation of
   hugetlb memory from bootmem and creation of CMA areas for hugetlb
   (Mike Rapoport)

 - "mm: clean up anon_vma implementation" cleans up the anon_vma
   implementation in various ways (Lorenzo Stoakes)

 - "tweaks for __alloc_pages_slowpath()" does a little streamlining of
   the page allocator's slowpath code (Vlastimil Babka)

 - "memcg: separate private and public ID namespaces" cleans up the
   memcg ID code and prevents the internal-only private IDs from being
   exposed to userspace (Shakeel Butt)

 - "mm: hugetlb: allocate frozen gigantic folio" cleans up the
   allocation of frozen folios and avoids some atomic refcount
   operations (Kefeng Wang)

 - "mm/damon: advance DAMOS-based LRU sorting" improves DAMOS's movement
   of memory betewwn the active and inactive LRUs and adds auto-tuning
   of the ratio-based quotas and of monitoring intervals (SeongJae Park)

 - "Support page table check on PowerPC" makes
   CONFIG_PAGE_TABLE_CHECK_ENFORCED work on powerpc (Andrew Donnellan)

 - "nodemask: align nodes_and{,not} with underlying bitmap ops" makes
   nodes_and() and nodes_andnot() propagate the return values from the
   underlying bit operations, enabling some cleanup in calling code
   (Yury Norov)

 - "mm/damon: hide kdamond and kdamond_lock from API callers" cleans up
   some DAMON internal interfaces (SeongJae Park)

 - "mm/khugepaged: cleanups and scan limit fix" does some cleanup work
   in khupaged and fixes a scan limit accounting issue (Shivank Garg)

 - "mm: balloon infrastructure cleanups" goes to town on the balloon
   infrastructure and its page migration function. Mainly cleanups, also
   some locking simplification (David Hildenbrand)

 - "mm/vmscan: add tracepoint and reason for kswapd_failures reset" adds
   additional tracepoints to the page reclaim code (Jiayuan Chen)

 - "Replace wq users and add WQ_PERCPU to alloc_workqueue() users" is
   part of Marco's kernel-wide migration from the legacy workqueue APIs
   over to the preferred unbound workqueues (Marco Crivellari)

 - "Various mm kselftests improvements/fixes" provides various unrelated
   improvements/fixes for the mm kselftests (Kevin Brodsky)

 - "mm: accelerate gigantic folio allocation" greatly speeds up gigantic
   folio allocation, mainly by avoiding unnecessary work in
   pfn_range_valid_contig() (Kefeng Wang)

 - "selftests/damon: improve leak detection and wss estimation
   reliability" improves the reliability of two of the DAMON selftests
   (SeongJae Park)

 - "mm/damon: cleanup kdamond, damon_call(), damos filter and
   DAMON_MIN_REGION" does some cleanup work in the core DAMON code
   (SeongJae Park)

 - "Docs/mm/damon: update intro, modules, maintainer profile, and misc"
   performs maintenance work on the DAMON documentation (SeongJae Park)

 - "mm: add and use vma_assert_stabilised() helper" refactors and cleans
   up the core VMA code. The main aim here is to be able to use the mmap
   write lock's lockdep state to perform various assertions regarding
   the locking which the VMA code requires (Lorenzo Stoakes)

 - "mm, swap: swap table phase II: unify swapin use" removes some old
   swap code (swap cache bypassing and swap synchronization) which
   wasn't working very well. Various other cleanups and simplifications
   were made. The end result is a 20% speedup in one benchmark (Kairui
   Song)

 - "enable PT_RECLAIM on more 64-bit architectures" makes PT_RECLAIM
   available on 64-bit alpha, loongarch, mips, parisc, and um. Various
   cleanups were performed along the way (Qi Zheng)

* tag 'mm-stable-2026-02-11-19-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (325 commits)
  mm/memory: handle non-split locks correctly in zap_empty_pte_table()
  mm: move pte table reclaim code to memory.c
  mm: make PT_RECLAIM depends on MMU_GATHER_RCU_TABLE_FREE
  mm: convert __HAVE_ARCH_TLB_REMOVE_TABLE to CONFIG_HAVE_ARCH_TLB_REMOVE_TABLE config
  um: mm: enable MMU_GATHER_RCU_TABLE_FREE
  parisc: mm: enable MMU_GATHER_RCU_TABLE_FREE
  mips: mm: enable MMU_GATHER_RCU_TABLE_FREE
  LoongArch: mm: enable MMU_GATHER_RCU_TABLE_FREE
  alpha: mm: enable MMU_GATHER_RCU_TABLE_FREE
  mm: change mm/pt_reclaim.c to use asm/tlb.h instead of asm-generic/tlb.h
  mm/damon/stat: remove __read_mostly from memory_idle_ms_percentiles
  zsmalloc: make common caches global
  mm: add SPDX id lines to some mm source files
  mm/zswap: use %pe to print error pointers
  mm/vmscan: use %pe to print error pointers
  mm/readahead: fix typo in comment
  mm: khugepaged: fix NR_FILE_PAGES and NR_SHMEM in collapse_file()
  mm: refactor vma_map_pages to use vm_insert_pages
  mm/damon: unify address range representation with damon_addr_range
  mm/cma: replace snprintf with strscpy in cma_new_area
  ...

diff --cc Documentation/admin-guide/sysctl/vm.rst
Simple merge

diff --cc MAINTAINERS
Simple merge

diff --cc arch/arm64/Kconfig
Simple merge

diff --cc arch/arm64/include/asm/thread_info.h
Simple merge

diff --cc arch/loongarch/Kconfig
Simple merge

diff --cc arch/powerpc/Kconfig
Simple merge

diff --cc arch/powerpc/include/asm/book3s/32/pgtable.h
Simple merge

diff --cc arch/powerpc/mm/mem.c
Simple merge

diff --cc arch/sparc/Kconfig
Simple merge

diff --cc arch/sparc/mm/init_64.c
Simple merge

diff --cc arch/x86/Kconfig
index 66446220afe8cb6110b8679fef94eac529f353ec,a18b4263151dbc4912dfe68c30ea76a106a24e27..e2df1b147184a6ed451a9d82a6cbfc72a78aa253
--- 1/arch/x86/Kconfig
--- 2/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@@ -823,7 -807,15 +822,8 @@@ config PARAVIR
  config PARAVIRT_XXL
        bool
        depends on X86_64
+       select ARCH_HAS_LAZY_MMU_MODE
  
 -config PARAVIRT_DEBUG
 -      bool "paravirt-ops debugging"
 -      depends on PARAVIRT && DEBUG_KERNEL
 -      help
 -        Enable to debug paravirt_ops internals.  Specifically, BUG if
 -        a paravirt_op is missing when it is called.
 -
  config PARAVIRT_SPINLOCKS
        bool "Paravirtualization layer for spinlocks"
        depends on PARAVIRT && SMP

diff --cc arch/x86/include/asm/paravirt.h
index 3d0b92a8a557ecdbcc65d19afdea9f6f003b64a8,13f9cd31c8f8b3f4c920559250c4e649d7b5f23f..fcf8ab50948aa184d7f7bfe0ad0a1030e527f1f7
--- 1/arch/x86/include/asm/paravirt.h
--- 2/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@@ -489,13 -523,12 +489,12 @@@ static inline void arch_start_context_s
  
  static inline void arch_end_context_switch(struct task_struct *next)
  {
 -      PVOP_VCALL1(cpu.end_context_switch, next);
 +      PVOP_VCALL1(pv_ops, cpu.end_context_switch, next);
  }
  
- #define  __HAVE_ARCH_ENTER_LAZY_MMU_MODE
  static inline void arch_enter_lazy_mmu_mode(void)
  {
 -      PVOP_VCALL0(mmu.lazy_mode.enter);
 +      PVOP_VCALL0(pv_ops, mmu.lazy_mode.enter);
  }
  
  static inline void arch_leave_lazy_mmu_mode(void)

diff --cc arch/x86/kernel/setup.c
Simple merge

diff --cc arch/x86/mm/init.c
Simple merge

diff --cc arch/x86/xen/enlighten_pv.c
Simple merge

diff --cc arch/x86/xen/mmu_pv.c
Simple merge

diff --cc block/blk-mq.c
Simple merge

diff --cc fs/ext4/inode.c
Simple merge

diff --cc fs/proc/task_mmu.c
Simple merge

diff --cc fs/sync.c
Simple merge

diff --cc fs/xfs/xfs_super.c
Simple merge

diff --cc include/linux/cma.h
index 2e6931735880bdf34ad8eb425de770b07a2a6a70,e2a690f7e77eba51ad09ce653fe1e81a8dc28103..d0793eaaadaa49ffc5196a5b721b54b9d262d4d3
--- 1/include/linux/cma.h
--- 2/include/linux/cma.h
+++ b/include/linux/cma.h
@@@ -57,33 -62,4 +62,13 @@@ extern bool cma_intersects(struct cma *
  
  extern void cma_reserve_pages_on_error(struct cma *cma);
  
- #ifdef CONFIG_CMA
- struct folio *cma_alloc_folio(struct cma *cma, int order, gfp_t gfp);
- bool cma_free_folio(struct cma *cma, const struct folio *folio);
- bool cma_validate_zones(struct cma *cma);
- #else
- static inline struct folio *cma_alloc_folio(struct cma *cma, int order, gfp_t gfp)
- {
-       return NULL;
- }
- 
- static inline bool cma_free_folio(struct cma *cma, const struct folio *folio)
- {
-       return false;
- }
- static inline bool cma_validate_zones(struct cma *cma)
- {
-       return false;
- }
- #endif
- 
 +#ifdef CONFIG_DMA_CMA
 +extern bool cma_skip_dt_default_reserved_mem(void);
 +#else
 +static inline bool cma_skip_dt_default_reserved_mem(void)
 +{
 +      return false;
 +}
 +#endif
 +
  #endif

diff --cc include/linux/memcontrol.h
Simple merge

diff --cc include/linux/mm.h
Simple merge

diff --cc include/linux/sched.h
Simple merge

diff --cc include/linux/vmstat.h
Simple merge

diff --cc include/trace/events/writeback.h
Simple merge

diff --cc include/uapi/linux/sysctl.h
Simple merge

diff --cc kernel/cgroup/cpuset.c
Simple merge

diff --cc kernel/power/swap.c
Simple merge

diff --cc mm/Kconfig
Simple merge

diff --cc mm/Makefile
Simple merge

diff --cc mm/huge_memory.c
Simple merge

diff --cc mm/internal.h
Simple merge

diff --cc mm/kfence/core.c
Simple merge

diff --cc mm/memcontrol-v1.h
index a304ad418cdfec60a54cc40f34dbd8df9b4bdf8f,49933925b4bae6f14b2333d2fe8e21eab9995aff..eb3c3c1056574618b0db1498a2ae9587dafe86b8
--- 1/mm/memcontrol-v1.h
--- 2/mm/memcontrol-v1.h
+++ b/mm/memcontrol-v1.h
@@@ -25,12 -25,11 +25,10 @@@
  void drain_all_stock(struct mem_cgroup *root_memcg);
  
  unsigned long memcg_events(struct mem_cgroup *memcg, int event);
 -unsigned long memcg_page_state_output(struct mem_cgroup *memcg, int item);
  int memory_stat_show(struct seq_file *m, void *v);
  
- void mem_cgroup_id_get_many(struct mem_cgroup *memcg, unsigned int n);
- struct mem_cgroup *mem_cgroup_id_get_online(struct mem_cgroup *memcg);
+ void mem_cgroup_private_id_get_many(struct mem_cgroup *memcg, unsigned int n);
+ struct mem_cgroup *mem_cgroup_private_id_get_online(struct mem_cgroup *memcg);
  
  /* Cgroup v1-specific declarations */
  #ifdef CONFIG_MEMCG_V1

diff --cc mm/memcontrol.c
Simple merge

diff --cc mm/memory-failure.c
Simple merge

diff --cc mm/memory.c
Simple merge

diff --cc mm/page_alloc.c
Simple merge

diff --cc mm/readahead.c
Simple merge

diff --cc mm/shmem.c
Simple merge

diff --cc mm/slub.c
Simple merge

diff --cc mm/swapfile.c
Simple merge

diff --cc mm/vmstat.c
Simple merge