Changes in Makefile

4e8e1c498de9f97628207d1ef84506058b06bb51 - mm/memcg: remove no longer used swap cgroup array

Sun, 17 May 2026 17:39:50 +0200

mm/memcg: remove no longer used swap cgroup arrayNow all swap cgroup records are stored in the swap cluster directly, thestatic array is no longer needed.Link: https://lore.kernel.org/20260517-swap-table-p4-v5-11-88ae43e064c7@tencent.comSigned-off-by: Kairui Song Acked-by: Chris Li Cc: Baolin Wang Cc: Baoquan He Cc: Barry Song Cc: Chengming Zhou Cc: David Hildenbrand Cc: Hugh Dickins Cc: Johannes Weiner Cc: Kemeng Shi Cc: Lorenzo Stoakes Cc: Muchun Song Cc: Nhat Pham Cc: Roman Gushchin Cc: Shakeel Butt Cc: Youngjun Park Cc: Zi Yan Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

136114e0abf03005e182d75761ab694648e6d388 - Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Thu, 12 Feb 2026 21:13:01 +0100

Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mmPull non-MM updates from Andrew Morton: - "ocfs2: give ocfs2 the ability to reclaim suballocator free bg" saves disk space by teaching ocfs2 to reclaim suballocator block group space (Heming Zhao) - "Add ARRAY_END(), and use it to fix off-by-one bugs" adds the ARRAY_END() macro and uses it in various places (Alejandro Colomar) - "vmcoreinfo: support VMCOREINFO_BYTES larger than PAGE_SIZE" makes the vmcore code future-safe, if VMCOREINFO_BYTES ever exceeds the page size (Pnina Feder) - "kallsyms: Prevent invalid access when showing module buildid" cleans up kallsyms code related to module buildid and fixes an invalid access crash when printing backtraces (Petr Mladek) - "Address page fault in ima_restore_measurement_list()" fixes a kexec-related crash that can occur when booting the second-stage kernel on x86 (Harshit Mogalapalli) - "kho: ABI headers and Documentation updates" updates the kexec handover ABI documentation (Mike Rapoport) - "Align atomic storage" adds the __aligned attribute to atomic_t and atomic64_t definitions to get natural alignment of both types on csky, m68k, microblaze, nios2, openrisc and sh (Finn Thain) - "kho: clean up page initialization logic" simplifies the page initialization logic in kho_restore_page() (Pratyush Yadav) - "Unload linux/kernel.h" moves several things out of kernel.h and into more appropriate places (Yury Norov) - "don't abuse task_struct.group_leader" removes the usage of ->group_leader when it is "obviously unnecessary" (Oleg Nesterov) - "list private v2 & luo flb" adds some infrastructure improvements to the live update orchestrator (Pasha Tatashin)* tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (107 commits) watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency procfs: fix missing RCU protection when reading real_parent in do_task_stat() watchdog/softlockup: fix sample ring index wrap in need_counting_irqs() kcsan, compiler_types: avoid duplicate type issues in BPF Type Format kho: fix doc for kho_restore_pages() tests/liveupdate: add in-kernel liveupdate test liveupdate: luo_flb: introduce File-Lifecycle-Bound global state liveupdate: luo_file: Use private list list: add kunit test for private list primitives list: add primitives for private list manipulations delayacct: fix uapi timespec64 definition panic: add panic_force_cpu= parameter to redirect panic to a specific CPU netclassid: use thread_group_leader(p) in update_classid_task() RDMA/umem: don't abuse current->group_leader drm/pan*: don't abuse current->group_leader drm/amd: kill the outdated "Only the pthreads threading model is supported" checks drm/amdgpu: don't abuse current->group_leader android/binder: use same_thread_group(proc->tsk, current) in binder_mmap() android/binder: don't abuse current->group_leader kho: skip memoryless NUMA nodes when reserving scratch areas ... List of files: /linux/mm/Makefile

4cff5c05e076d2ee4e34122aa956b84a2eaac587 - Merge tag 'mm-stable-2026-02-11-19-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Thu, 12 Feb 2026 20:32:37 +0100

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

4c640eb4181cf8de74c8b9e7c9cf16bf8d26b73e - mm: move pte table reclaim code to memory.c

Mon, 19 Jan 2026 23:07:07 +0100

mm: move pte table reclaim code to memory.cSome cleanups for PT table reclaim code, triggered by a false-positivewarning we might start to see soon after we unlocked pt-reclaim onarchitectures besides x86-64.This patch (of 2):The pte-table reclaim code is only called from memory.c, while zappingpages, and it better also stays that way in the long run. If we ever haveto call it from other files, we should expose proper high-level helpersfor zapping if the existing helpers are not good enough.So, let's move the code over (it's not a lot) and slightly clean it up abit by:- Renaming the functions.- Dropping the "Check if it is empty PTE page" comment, which is now self-explaining given the function name.- Making zap_pte_table_if_empty() return whether zapping worked so the caller can free it.- Adding a comment in pte_table_reclaim_possible().- Inlining free_pte() in the last remaining user.- In zap_empty_pte_table(), switch from pmdp_get_lcokless() to pmd_clear(), we are holding the PMD PT lock.By moving the code over, compilers can also easily figure out whenzap_empty_pte_table() does not initialize the pmdval variable, avoidingfalse-positive warnings about the variable possibly not being initialized.Link: https://lkml.kernel.org/r/20260119220708.3438514-1-david@kernel.orgLink: https://lkml.kernel.org/r/20260119220708.3438514-2-david@kernel.orgSigned-off-by: David Hildenbrand (Red Hat) Reviewed-by: Qi Zheng Cc: Liam Howlett Cc: "Liam R. Howlett" Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

1421758055ca6028d3b758914863f38d434bf36b - mm: rename CONFIG_MEMORY_BALLOON -> CONFIG_BALLOON

Tue, 20 Jan 2026 00:01:31 +0100

mm: rename CONFIG_MEMORY_BALLOON -> CONFIG_BALLOONLet's make it consistent with the naming of the files but also with thenaming of CONFIG_BALLOON_MIGRATION.While at it, add a "/* CONFIG_BALLOON */".Link: https://lkml.kernel.org/r/20260119230133.3551867-24-david@kernel.orgSigned-off-by: David Hildenbrand (Red Hat) Reviewed-by: Lorenzo Stoakes Acked-by: Michael S. Tsirkin Cc: Arnd Bergmann Cc: Christophe Leroy Cc: Eugenio Pérez Cc: Greg Kroah-Hartman Cc: Jason Wang Cc: Jerrin Shaji George Cc: Jonathan Corbet Cc: Liam Howlett Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Michal Hocko Cc: Mike Rapoport Cc: Nicholas Piggin Cc: Oscar Salvador Cc: SeongJae Park Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Xuan Zhuo Cc: Zi Yan Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

25b48b4cdf912f70998336b861a4bf767ee3d332 - mm: rename balloon_compaction.(c|h) to balloon.(c|h)

Tue, 20 Jan 2026 00:01:28 +0100

mm: rename balloon_compaction.(c|h) to balloon.(c|h)Even without CONFIG_BALLOON_COMPACTION this infrastructure implementsbasic list and page management for a memory balloon.Link: https://lkml.kernel.org/r/20260119230133.3551867-21-david@kernel.orgSigned-off-by: David Hildenbrand (Red Hat) Reviewed-by: Lorenzo Stoakes Acked-by: Michael S. Tsirkin Cc: Arnd Bergmann Cc: Christophe Leroy Cc: Eugenio Pérez Cc: Greg Kroah-Hartman Cc: Jason Wang Cc: Jerrin Shaji George Cc: Jonathan Corbet Cc: Liam Howlett Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Michal Hocko Cc: Mike Rapoport Cc: Nicholas Piggin Cc: Oscar Salvador Cc: SeongJae Park Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Xuan Zhuo Cc: Zi Yan Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

998be0a4dbcaa796a05c7b52327f3a09c29d3662 - liveupdate: separate memfd support into LIVEUPDATE_MEMFD

Tue, 30 Dec 2025 17:14:02 +0100

liveupdate: separate memfd support into LIVEUPDATE_MEMFDDecouple memfd preservation support from the core Live Update Orchestratorconfiguration.Previously, enabling CONFIG_LIVEUPDATE forced a dependency on CONFIG_SHMEMand unconditionally compiled memfd_luo.o. However, Live Update may beused for purposes that do not require memfd-backed memory preservation.Introduce CONFIG_LIVEUPDATE_MEMFD to gate memfd_luo.o. This moves theSHMEM and MEMFD_CREATE dependencies to the specific feature that needsthem, allowing the base LIVEUPDATE option to be selected independently ofshared memory support.Link: https://lkml.kernel.org/r/20251230161402.1542099-1-pasha.tatashin@soleen.comSigned-off-by: Pasha Tatashin Reviewed-by: Pratyush Yadav Reviewed-by: Mike Rapoport (Microsoft) Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

ee628d9cc8d5b96fdceeb270cf662efc4f85f2b6 - mm: add basic tests for lazy_mmu

Mon, 15 Dec 2025 16:03:23 +0100

mm: add basic tests for lazy_mmuAdd basic KUnit tests for the generic aspects of the lazy MMU mode: ensurethat it appears active when it should, depending on how enable/disable andpause/resume pairs are nested.[akpm@linux-foundation.org: export ppc64_tlb_batch and __flush_tlb_pending to modules][ritesh.list@gmail.com: use EXPORT_SYMBOL_IF_KUNIT()] Link: https://lkml.kernel.org/r/87a4zhkt6h.ritesh.list@gmail.com[kevin.brodsky@arm.com: move MODULE_IMPORT_NS(), add comment] Link: https://lkml.kernel.org/r/20251217163812.2633648-2-kevin.brodsky@arm.comLink: https://lkml.kernel.org/r/20251215150323.2218608-15-kevin.brodsky@arm.comSigned-off-by: Kevin Brodsky Reviewed-by: Yeoreum Yun Signed-off-by: Ritesh Harjani (IBM) Acked-by: David Hildenbrand (Red Hat) Cc: Alexander Gordeev Cc: Andreas Larsson Cc: Anshuman Khandual Cc: Borislav Betkov Cc: Boris Ostrovsky Cc: Catalin Marinas Cc: Christophe Leroy Cc: David S. Miller Cc: David Woodhouse Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Jann Horn Cc: Juegren Gross Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Michal Hocko Cc: Mike Rapoport Cc: Nicholas Piggin Cc: Peter Zijlstra Cc: Ritesh Harjani (IBM) Cc: Ryan Roberts Cc: Suren Baghdasaryan Cc: Thomas Gleinxer Cc: Venkat Rao Bagalkote Cc: Vlastimil Babka Cc: Will Deacon Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

5904db9891f80f84283648121e2d8c8a506296a8 - mm: introduce BPF kfuncs to deal with memcg pointers

Tue, 23 Dec 2025 05:41:52 +0100

mm: introduce BPF kfuncs to deal with memcg pointersTo effectively operate with memory cgroups in BPF there is a needto convert css pointers to memcg pointers. A simple container_ofcast which is used in the kernel code can't be used in BPF becausefrom the verifier's point of view that's a out-of-bounds memory access.Introduce helper get/put kfuncs which can be used to geta refcounted memcg pointer from the css pointer: - bpf_get_mem_cgroup, - bpf_put_mem_cgroup.bpf_get_mem_cgroup() can take both memcg's css and the correspondingcgroup's "self" css. It allows it to be used with the existing cgroupiterator which iterates over cgroup tree, not memcg tree.Signed-off-by: Roman Gushchin Link: https://lore.kernel.org/r/20251223044156.208250-3-roman.gushchin@linux.devSigned-off-by: Alexei Starovoitov List of files: /linux/mm/Makefile

509d3f45847627f4c5cdce004c3ec79262b5239c - Merge tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Sat, 06 Dec 2025 23:01:20 +0100

Merge tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mmPull non-MM updates from Andrew Morton: - "panic: sys_info: Refactor and fix a potential issue" (Andy Shevchenko) fixes a build issue and does some cleanup in ib/sys_info.c - "Implement mul_u64_u64_div_u64_roundup()" (David Laight) enhances the 64-bit math code on behalf of a PWM driver and beefs up the test module for these library functions - "scripts/gdb/symbols: make BPF debug info available to GDB" (Ilya Leoshkevich) makes BPF symbol names, sizes, and line numbers available to the GDB debugger - "Enable hung_task and lockup cases to dump system info on demand" (Feng Tang) adds a sysctl which can be used to cause additional info dumping when the hung-task and lockup detectors fire - "lib/base64: add generic encoder/decoder, migrate users" (Kuan-Wei Chiu) adds a general base64 encoder/decoder to lib/ and migrates several users away from their private implementations - "rbree: inline rb_first() and rb_last()" (Eric Dumazet) makes TCP a little faster - "liveupdate: Rework KHO for in-kernel users" (Pasha Tatashin) reworks the KEXEC Handover interfaces in preparation for Live Update Orchestrator (LUO), and possibly for other future clients - "kho: simplify state machine and enable dynamic updates" (Pasha Tatashin) increases the flexibility of KEXEC Handover. Also preparation for LUO - "Live Update Orchestrator" (Pasha Tatashin) is a major new feature targeted at cloud environments. Quoting the cover letter: This series introduces the Live Update Orchestrator, a kernel subsystem designed to facilitate live kernel updates using a kexec-based reboot. This capability is critical for cloud environments, allowing hypervisors to be updated with minimal downtime for running virtual machines. LUO achieves this by preserving the state of selected resources, such as memory, devices and their dependencies, across the kernel transition. As a key feature, this series includes support for preserving memfd file descriptors, which allows critical in-memory data, such as guest RAM or any other large memory region, to be maintained in RAM across the kexec reboot. Mike Rappaport merits a mention here, for his extensive review and testing work. - "kexec: reorganize kexec and kdump sysfs" (Sourabh Jain) moves the kexec and kdump sysfs entries from /sys/kernel/ to /sys/kernel/kexec/ and adds back-compatibility symlinks which can hopefully be removed one day - "kho: fixes for vmalloc restoration" (Mike Rapoport) fixes a BUG which was being hit during KHO restoration of vmalloc() regions* tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (139 commits) calibrate: update header inclusion Reinstate "resource: avoid unnecessary lookups in find_next_iomem_res()" vmcoreinfo: track and log recoverable hardware errors kho: fix restoring of contiguous ranges of order-0 pages kho: kho_restore_vmalloc: fix initialization of pages array MAINTAINERS: TPM DEVICE DRIVER: update the W-tag init: replace simple_strtoul with kstrtoul to improve lpj_setup KHO: fix boot failure due to kmemleak access to non-PRESENT pages Documentation/ABI: new kexec and kdump sysfs interface Documentation/ABI: mark old kexec sysfs deprecated kexec: move sysfs entries to /sys/kernel/kexec test_kho: always print restore status kho: free chunks using free_page() instead of kfree() selftests/liveupdate: add kexec test for multiple and empty sessions selftests/liveupdate: add simple kexec-based selftest for LUO selftests/liveupdate: add userspace API selftests docs: add documentation for memfd preservation via LUO mm: memfd_luo: allow preserving memfd liveupdate: luo_file: add private argument to store runtime state mm: shmem: export some functions to internal.h ... List of files: /linux/mm/Makefile

b3749f174d686627f702234e64bad976dc432dbc - mm: memfd_luo: allow preserving memfd

Tue, 25 Nov 2025 17:58:44 +0100

mm: memfd_luo: allow preserving memfdThe ability to preserve a memfd allows userspace to use KHO and LUO totransfer its memory contents to the next kernel. This is useful in manyways. For one, it can be used with IOMMUFD as the backing store for IOMMUpage tables. Preserving IOMMUFD is essential for performing a hypervisorlive update with passthrough devices. memfd support provides the firstbuilding block for making that possible.For another, applications with a large amount of memory that takes time toreconstruct, reboots to consume kernel upgrades can be very expensive. memfd with LUO gives those applications reboot-persistent memory that theycan use to quickly save and reconstruct that state.While memfd is backed by either hugetlbfs or shmem, currently only supporton shmem is added. To be more precise, support for anonymous shmem filesis added.The handover to the next kernel is not transparent. All the properties ofthe file are not preserved; only its memory contents, position, and size. The recreated file gets the UID and GID of the task doing the restore, andthe task's cgroup gets charged with the memory.Once preserved, the file cannot grow or shrink, and all its pages arepinned to avoid migrations and swapping. The file can still be read fromor written to.Use vmalloc to get the buffer to hold the folios, and preserve it usingkho_preserve_vmalloc(). This doesn't have the size limit.Link: https://lkml.kernel.org/r/20251125165850.3389713-15-pasha.tatashin@soleen.comSigned-off-by: Pratyush Yadav Co-developed-by: Pasha Tatashin Signed-off-by: Pasha Tatashin Reviewed-by: Mike Rapoport (Microsoft) Tested-by: David Matlack Cc: Aleksander Lobakin Cc: Alexander Graf Cc: Alice Ryhl Cc: Andriy Shevchenko Cc: anish kumar Cc: Anna Schumaker Cc: Bartosz Golaszewski Cc: Bjorn Helgaas Cc: Borislav Betkov Cc: Chanwoo Choi Cc: Chen Ridong Cc: Chris Li Cc: Christian Brauner Cc: Daniel Wagner Cc: Danilo Krummrich Cc: Dan Williams Cc: David Hildenbrand Cc: David Jeffery Cc: David Rientjes Cc: Greg Kroah-Hartman Cc: Guixin Liu Cc: "H. Peter Anvin" Cc: Hugh Dickins Cc: Ilpo Järvinen Cc: Ingo Molnar Cc: Ira Weiny Cc: Jann Horn Cc: Jason Gunthorpe Cc: Jens Axboe Cc: Joanthan Cameron Cc: Joel Granados Cc: Johannes Weiner Cc: Jonathan Corbet Cc: Lennart Poettering Cc: Leon Romanovsky Cc: Leon Romanovsky Cc: Lukas Wunner Cc: Marc Rutland Cc: Masahiro Yamada Cc: Matthew Maurer Cc: Miguel Ojeda Cc: Myugnjoo Ham Cc: Parav Pandit Cc: Pratyush Yadav Cc: Randy Dunlap Cc: Roman Gushchin Cc: Saeed Mahameed Cc: Samiullah Khawaja Cc: Song Liu Cc: Steven Rostedt Cc: Stuart Hayes Cc: Tejun Heo Cc: Thomas Gleinxer Cc: Thomas Weißschuh Cc: Vincent Guittot Cc: William Tu Cc: Yoann Congal Cc: Zhu Yanjun Cc: Zijun Hu Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

cdcb53e1deef9bd6ba782645b7297863061c0b4c - mm/hugetlb: extract sysctl into hugetlb_sysctl.c

Thu, 06 Nov 2025 04:08:23 +0100

mm/hugetlb: extract sysctl into hugetlb_sysctl.cFollowing the extraction of sysfs code, this patch moves the sysctlinterface implementation into a dedicated file to further improve codeorganization and maintainability of the hugetlb subsystem.The following components are moved to mm/hugetlb_sysctl.c:- proc_hugetlb_doulongvec_minmax()- hugetlb_sysctl_handler_common()- hugetlb_sysctl_handler()- hugetlb_mempolicy_sysctl_handler() (CONFIG_NUMA)- hugetlb_overcommit_handler()- hugetlb_table[] sysctl table definition- hugetlb_sysctl_init()The hugetlb_internal.h header file is updated to declare the sysctlinitialization function with proper #ifdef guards for configurationswithout CONFIG_SYSCTL support.The Makefile is updated to compile hugetlb_sysctl.o when CONFIG_HUGETLBFSis enabled. This refactoring reduces the size of hugetlb.c and logicallyseparates the sysctl interface from core hugetlb management code.MAINTAINERS is updated to add new file hugetlb_sysctl.c.No functional changes are introduced; all code is moved as-is fromhugetlb.c with consistent formatting.Link: https://lkml.kernel.org/r/5bbee7ab5be71d0bb1aebec38642d7e83526bb7a.1762398359.git.zhuhui@kylinos.cnSigned-off-by: Geliang Tang Signed-off-by: Hui Zhu Cc: David Hildenbrand Cc: Muchun Song Cc: Oscar Salvador Cc: SeongJae Park Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

ecd6703f64d76ee4fc8cc2205bfb892d3bb9f538 - mm/hugetlb: extract sysfs into hugetlb_sysfs.c

Thu, 06 Nov 2025 04:08:22 +0100

mm/hugetlb: extract sysfs into hugetlb_sysfs.cPatch series "mm/hugetlb: refactor sysfs/sysctl interfaces", v5.hugetlb.c has grown significantly and become difficult to maintain. Thispatch series extracts the sysfs and sysctl interface code into separatededicated files to improve code organization.The refactoring includes:- Patch 1: Extract sysfs interface into mm/hugetlb_sysfs.c- Patch 2: Extract sysctl interface into mm/hugetlb_sysctl.cNo functional changes are introduced in this series. The code is movedas-is, with only minor formatting adjustments for code style consistency. This should make future maintenance and enhancements to the hugetlbsubsystem easier.Testing: The patch series has been compile-tested and maintains the samefunctionality as the original code.This patch (of 2):Currently, hugetlb.c contains both core management logic and sysfsinterface implementations, making it difficult to maintain. This patchextracts the sysfs-related code into a dedicated file to improve codeorganization.The following components are moved to mm/hugetlb_sysfs.c:- sysfs attribute definitions and handlers- sysfs kobject management functions- NUMA per-node hstate attribute registrationSeveral inline helper functions and macros are moved tomm/hugetlb_internal.h:- hstate_is_gigantic_no_runtime()- next_node_allowed()- get_valid_node_allowed()- hstate_next_node_to_alloc()- hstate_next_node_to_free()- for_each_node_mask_to_alloc/to_free macrosTo support code sharing, these functions are changed from static toexported symbols:- remove_hugetlb_folio()- add_hugetlb_folio()- init_new_hugetlb_folio()- prep_and_add_allocated_folios()- demote_pool_huge_page()- __nr_hugepages_store_common()The Makefile is updated to compile hugetlb_sysfs.o when CONFIG_HUGETLBFSis enabled. This maintains all existing functionality while improvingmaintainability by separating concerns.MAINTAINERS is updated to add new file hugetlb_sysfs.c.Link: https://lkml.kernel.org/r/cover.1762398359.git.zhuhui@kylinos.cnLink: https://lkml.kernel.org/r/656a03dff7e2bb20e24e841ede81fdca01d21410.1762398359.git.zhuhui@kylinos.cnSigned-off-by: Geliang Tang Signed-off-by: Hui Zhu Cc: David Hildenbrand Cc: Muchun Song Cc: Oscar Salvador Cc: SeongJae Park Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

2ccd9fecd9163f168761d4398564c81554f636ef - mm: remove unused zpool layer

Fri, 29 Aug 2025 18:15:27 +0200

mm: remove unused zpool layerWith zswap using zsmalloc directly, there are no more in-tree users ofthis code. Remove it.With zpool gone, zsmalloc is now always a simple dependency and nolonger something the user needs to configure. Hide CONFIG_ZSMALLOCfrom the user and have zswap and zram pull it in as needed.Link: https://lkml.kernel.org/r/20250829162212.208258-3-hannes@cmpxchg.orgSigned-off-by: Johannes Weiner Acked-by: SeongJae Park Acked-by: Yosry Ahmed Cc: Chengming Zhou Cc: Nhat Pham Cc: Vitaly Wool Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

9a4f90e246615d1f42a9b907deb9b4c0a418d996 - mm: remove mm/io-mapping.c

Fri, 25 Jul 2025 16:29:01 +0200

mm: remove mm/io-mapping.cThis is dead code, which was used from commit b739f125e4eb ("i915: useio_mapping_map_user") but reverted a month later by commit 0e4fe0c9f2f9("Revert "i915: use io_mapping_map_user"") back in 2021.Since then nobody has used it, so remove it.[akpm@linux-foundation.org: update Documentation/core-api/mm-api.rst, per Vlastimil]Link: https://lkml.kernel.org/r/20250725142901.81502-1-lorenzo.stoakes@oracle.comSigned-off-by: Lorenzo Stoakes Acked-by: David Hildenbrand Acked-by: Vlastimil Babka Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mike Rapoport Cc: Suren Baghdasaryan Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

3e43e260f1e44d21861815faa905a1829027600f - mm: perform VMA allocation, freeing, duplication in mm

Mon, 28 Apr 2025 17:28:17 +0200

mm: perform VMA allocation, freeing, duplication in mmRight now these are performed in kernel/fork.c which is odd and aviolation of separation of concerns, as well as preventing us fromintegrating this and related logic into userland VMA testing goingforward.There is a fly in the ointment - nommu - mmap.c is not compiled ifCONFIG_MMU not set, and neither is vma.c.To square the circle, let's add a new file - vma_init.c. This will becompiled for both CONFIG_MMU and nommu builds, and will also form part ofthe VMA userland testing.This allows us to de-duplicate code, while maintaining separation ofconcerns and the ability for us to userland test this logic.Update the VMA userland tests accordingly, additionally adding adetach_free_vma() helper function to correctly detach VMAs before freeingthem in test code, as this change was triggering the assert for this.[akpm@linux-foundation.org: remove stray newline, per Liam]Link: https://lkml.kernel.org/r/f97b3a85a6da0196b28070df331b99e22b263be8.1745853549.git.lorenzo.stoakes@oracle.comSigned-off-by: Lorenzo Stoakes Reviewed-by: Liam R. Howlett Reviewed-by: Pedro Falcato Reviewed-by: David Hildenbrand Reviewed-by: Kees Cook Reviewed-by: Suren Baghdasaryan Reviewed-by: Vlastimil Babka Cc: Al Viro Cc: Christian Brauner Cc: Jan Kara Cc: Jann Horn Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

6c36ac1e124f1be97cf0485a220865fce5a2020d - mm: establish mm/vma_exec.c for shared exec/mm VMA functionality

Mon, 28 Apr 2025 17:28:14 +0200

mm: establish mm/vma_exec.c for shared exec/mm VMA functionalityPatch series "move all VMA allocation, freeing and duplication logic tomm", v3.Currently VMA allocation, freeing and duplication exist in kernel/fork.c,which is a violation of separation of concerns, and leaves these functionsexposed to the rest of the kernel when they are in fact internalimplementation details.Resolve this by moving this logic to mm, and making it internal to vma.c,vma.h.This also allows us, in future, to provide userland testing around thisfunctionality.We additionally abstract dup_mmap() to mm, being careful to ensurekernel/fork.c acceses this via the mm internal header so it is not exposedelsewhere in the kernel.As part of this change, also abstract initial stack allocation performedin __bprm_mm_init() out of fs code into mm via thecreate_init_stack_vma(), as this code uses vm_area_alloc() andvm_area_free().In order to do so sensibly, we introduce a new mm/vma_exec.c file, whichcontains the code that is shared by mm and exec. This file is added toboth memory mapping and exec sections in MAINTAINERS so both sets ofmaintainers can maintain oversight.As part of this change, we also move relocate_vma_down() to mm/vma_exec.cso all shared mm/exec functionality is kept in one place.We add code shared between nommu and mmu-enabled configurations in orderto share VMA allocation, freeing and duplication code correctly while alsokeeping these functions available in userland VMA testing.This is achieved by adding a mm/vma_init.c file which is also compiled bythe userland tests.This patch (of 4):There is functionality that overlaps the exec and memory mappingsubsystems. While it properly belongs in mm, it is important that execmaintainers maintain oversight of this functionality correctly.We can establish both goals by adding a new mm/vma_exec.c file whichcontains these 'glue' functions, and have fs/exec.c import them.As a part of this change, to ensure that proper oversight is achieved, addthe file to both the MEMORY MAPPING and EXEC & BINFMT API, ELF sections.scripts/get_maintainer.pl can correctly handle files in multiple entriesand this neatly handles the cross-over.[akpm@linux-foundation.org: fix comment typo] Link: https://lkml.kernel.org/r/80f0d0c6-0b68-47f9-ab78-0ab7f74677fc@lucifer.localLink: https://lkml.kernel.org/r/cover.1745853549.git.lorenzo.stoakes@oracle.comLink: https://lkml.kernel.org/r/91f2cee8f17d65214a9d83abb7011aa15f1ea690.1745853549.git.lorenzo.stoakes@oracle.comSigned-off-by: Lorenzo Stoakes Reviewed-by: Liam R. Howlett Reviewed-by: Suren Baghdasaryan Reviewed-by: Pedro Falcato Reviewed-by: David Hildenbrand Reviewed-by: Kees Cook Reviewed-by: Vlastimil Babka Cc: Al Viro Cc: Christian Brauner Cc: Jan Kara Cc: Jann Horn Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

f9aad622006bd64c28fdf73c03a1c5139fcbf049 - mm: rename GENERIC_PTDUMP and PTDUMP_CORE

Wed, 26 Feb 2025 13:24:04 +0100

mm: rename GENERIC_PTDUMP and PTDUMP_COREPlatforms subscribe into generic ptdump implementation via GENERIC_PTDUMP.But generic ptdump gets enabled via PTDUMP_CORE. These configscombination is confusing as they sound very similar and does notdifferentiate between platform's feature subscription and featureenablement for ptdump. Rename the configs as ARCH_HAS_PTDUMP and PTDUMPmaking it more clear and improve readability.Link: https://lkml.kernel.org/r/20250226122404.1927473-6-anshuman.khandual@arm.comSigned-off-by: Anshuman Khandual Reviewed-by: Christophe Leroy (powerpc)Acked-by: Catalin Marinas [arm64]Cc: Will Deacon Cc: Jonathan Corbet Cc: Marc Zyngier Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Christophe Leroy Cc: Madhavan Srinivasan Cc: Mark Rutland Cc: Steven Price Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

0ff67f990bd45726e0d9e91111d998e7a3595b32 - mm, swap: remove swap slot cache

Thu, 13 Mar 2025 17:59:34 +0100

mm, swap: remove swap slot cacheSlot cache is no longer needed now, removing it and all related code.- vm-scalability with: `usemem --init-time -O -y -x -R -31 1G`,12G memory cgroup using simulated pmem as SWAP (32G pmem, 32 CPUs),16 test runs for each case, measuring the total throughput: Before (KB/s) (stdev) After (KB/s) (stdev)Random (4K): 424907.60 (24410.78) 414745.92 (34554.78)Random (64K): 163308.82 (11635.72) 167314.50 (18434.99)Sequential (4K, !-R): 6150056.79 (103205.90) 6321469.06 (115878.16)The performance changes are below noise level.- Build linux kernel with make -j96, using 4K folio with 1.5G memorycgroup limit and 64K folio with 2G memory cgroup limit, on top of tmpfs,12 test runs, measuring the system time: Before (s) (stdev) After (s) (stdev)make -j96 (4K): 6445.69 (61.95) 6408.80 (69.46)make -j96 (64K): 6841.71 (409.04) 6437.99 (435.55)Similar to above, 64k mTHP case showed a slight improvement.Link: https://lkml.kernel.org/r/20250313165935.63303-7-ryncsn@gmail.comSigned-off-by: Kairui Song Reviewed-by: Baoquan He Cc: Baolin Wang Cc: Barry Song Cc: Chris Li Cc: "Huang, Ying" Cc: Hugh Dickins Cc: Johannes Weiner Cc: Kalesh Singh Cc: Matthew Wilcow (Oracle) Cc: Nhat Pham Cc: Yosry Ahmed Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile

474fe91f213a400334d41397de1a447560be76a6 - mm/hugetlb: move hugetlb CMA code in to its own file

Fri, 28 Feb 2025 19:29:28 +0100

mm/hugetlb: move hugetlb CMA code in to its own filehugetlb.c contained a number of CONFIG_CMA ifdefs, and the code insidethem was large enough to merit being in its own file, so move it, cleaningup things a bit.Hide some direct variable access behind functions to accommodate the move.No functional change intended.Link: https://lkml.kernel.org/r/20250228182928.2645936-28-fvdl@google.comSigned-off-by: Frank van der Linden Cc: Alexander Gordeev Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Dan Carpenter Cc: Dave Hansen Cc: David Hildenbrand Cc: Heiko Carstens Cc: Joao Martins Cc: Johannes Weiner Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Muchun Song Cc: Oscar Salvador Cc: Peter Zijlstra Cc: Roman Gushchin (Cruise) Cc: Usama Arif Cc: Vasily Gorbik Cc: Yu Zhao Cc: Zi Yan Signed-off-by: Andrew Morton List of files: /linux/mm/Makefile