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c42af83c59b65d01c0f7a074e450bbbb43b22f0d
linux/mm
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Akinobu Mita c42af83c59 memblock: fix memblock_estimated_nr_free_pages() for soft-reserved memory 
memblock_estimated_nr_free_pages() returns the difference between the total
size of the "memory" memblock type and the "reserved" memblock type.

The "soft-reserved" memory regions are added to the "reserved" memblock
type, but not to the "memory" memblock type. Therefore,
memblock_estimated_nr_free_pages() may return a smaller value than
expected, or if it underflows, an extremely large value.

/proc/sys/kernel/threads-max is determined by the value of
memblock_estimated_nr_free_pages().  This issue was discovered on machines
with CXL memory because kernel.threads-max was either smaller than expected
or extremely large for the installed DRAM size.

This fixes the issue by replacing memblock_reserved_size() with
memblock_reserved_kern_size() that tells how much memory was
reserved from the actual RAM.

Suggested-by: Mike Rapoport <rppt@kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Link: https://patch.msgid.link/20251111010010.7800-1-akinobu.mita@gmail.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
2025-11-11 18:15:35 +02:00
..
damon
mm/damon/core: use damos_commit_quota_goal() for new goal commit
2025-10-21 15:46:18 -07:00
kasan
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
kfence
kfence: drop nth_page() usage
2025-09-21 14:22:09 -07:00
kmsan
Merge tag 'dma-mapping-6.18-2025-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
2025-10-07 12:48:06 -07:00
backing-dev.c
Merge tag 'fuse-update-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
2025-10-03 12:48:18 -07:00
balloon_compaction.c
mm/migrate: fix NULL movable_ops if CONFIG_ZSMALLOC=m
2025-08-19 16:35:57 -07:00
bootmem_info.c
mm/sparse: allow for alternate vmemmap section init at boot
2025-03-16 22:06:27 -07:00
cma_debug.c
mm: cma: simplify cma_maxchunk_get()
2025-07-24 19:12:36 -07:00
cma_sysfs.c
mm/cma: export total and free number of pages for CMA areas
2025-03-16 22:06:24 -07:00
cma.c
mm/cma: refuse handing out non-contiguous page ranges
2025-09-21 14:22:06 -07:00
cma.h
mm: cma: set early_pfn and bitmap as a union in cma_memrange
2025-05-22 14:55:36 -07:00
compaction.c
mm/compaction: fix low_pfn advance on isolating hugetlb
2025-09-28 11:51:29 -07:00
debug_page_alloc.c
mm/debug_page_alloc: improve error message for invalid guardpage minorder
2025-05-12 23:50:38 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: clear page table entries at destroy_args()
2025-08-19 16:35:54 -07:00
debug.c
mm: convert core mm to mm_flags_*() accessors
2025-09-13 16:54:56 -07:00
dmapool_test.c
…
dmapool.c
docs: dma-api: replace consistent with coherent
2025-07-01 13:25:36 -06:00
early_ioremap.c
mm/early_ioremap: add null pointer checks to prevent NULL-pointer dereference
2025-01-13 22:40:59 -08:00
execmem.c
mm: remove PMD alignment constraint in execmem_vmalloc()
2025-09-28 11:51:31 -07:00
fadvise.c
fdget(), trivial conversions
2024-11-03 01:28:06 -05:00
fail_page_alloc.c
fault-inject: improve build for CONFIG_FAULT_INJECTION=n
2024-09-01 20:43:33 -07:00
failslab.c
fault-inject: improve build for CONFIG_FAULT_INJECTION=n
2024-09-01 20:43:33 -07:00
filemap.c
Merge tag 'nfs-for-6.18-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
2025-10-03 14:20:40 -07:00
folio-compat.c
mm: Remove grab_cache_page_write_begin()
2025-03-04 17:02:25 +00:00
gup_test.c
…
gup_test.h
…
gup.c
mm/gup: fix handling of errors from arch_make_folio_accessible() in follow_page_pte()
2025-09-21 14:22:29 -07:00
highmem.c
mm: constify highmem related functions for improved const-correctness
2025-09-21 14:22:15 -07:00
hmm.c
Merge tag 'dma-mapping-6.18-2025-09-30' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
2025-10-03 17:41:12 -07:00
huge_memory.c
mm: prevent poison consumption when splitting THP
2025-10-15 13:24:34 -07:00
hugetlb_cgroup.c
page_counter: track failcnt only for legacy cgroups
2025-03-17 00:05:35 -07:00
hugetlb_cma.c
mm: hugetlb: directly pass order when allocate a hugetlb folio
2025-09-21 14:22:11 -07:00
hugetlb_cma.h
mm: hugetlb: directly pass order when allocate a hugetlb folio
2025-09-21 14:22:11 -07:00
hugetlb_vmemmap.c
mm/pagewalk: split walk_page_range_novma() into kernel/user parts
2025-07-09 22:42:05 -07:00
hugetlb_vmemmap.h
mm/hugetlb: do pre-HVO for bootmem allocated pages
2025-03-16 22:06:29 -07:00
hugetlb.c
hugetlbfs: move lock assertions after early returns in huge_pmd_unshare()
2025-10-21 15:46:17 -07:00
hwpoison-inject.c
mm/hwpoison: decouple hwpoison_filter from mm/memory-failure.c
2025-09-21 14:22:21 -07:00
init-mm.c
mm: replace vm_lock and detached flag with a reference count
2025-03-16 22:06:20 -07:00
internal.h
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
interval_tree.c
…
ioremap.c
mm/ioremap: pass pgprot_t to ioremap_prot() instead of unsigned long
2025-03-16 22:06:23 -07:00
Kconfig
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
Kconfig.debug
mm: rename GENERIC_PTDUMP and PTDUMP_CORE
2025-03-17 00:05:32 -07:00
khugepaged.c
mm/khugepaged: use KMEM_CACHE()
2025-10-03 16:42:44 -07:00
kmemleak.c
mm: fix possible deadlock in kmemleak
2025-09-01 17:11:37 -07:00
ksm.c
mm/ksm: cleanup mm_slot_entry() invocation
2025-10-03 16:42:44 -07:00
list_lru.c
mm, list_lru: refactor the locking code
2025-07-09 22:41:56 -07:00
maccess.c
mm: unexport globally copy_to_kernel_nofault
2025-07-09 22:42:22 -07:00
madvise.c
mm: clean up is_guard_pte_marker()
2025-10-03 16:42:43 -07:00
Makefile
mm: remove unused zpool layer
2025-09-21 14:21:59 -07:00
mapping_dirty_helpers.c
mm: remove redundant pXd_devmap calls
2025-07-09 22:42:17 -07:00
memblock.c
memblock: fix memblock_estimated_nr_free_pages() for soft-reserved memory
2025-11-11 18:15:35 +02:00
memcontrol-v1.c
mm/memcg: v1: account event registrations and drop world-writable cgroup.event_control
2025-09-21 14:22:26 -07:00
memcontrol-v1.h
memcg: move do_memsw_account() to CONFIG_MEMCG_V1
2025-03-21 22:03:11 -07:00
memcontrol.c
memcg: skip cgroup_file_notify if spinning is not allowed
2025-10-07 14:01:11 -07:00
memfd.c
mm/memfd: remove redundant casts
2025-09-21 14:22:00 -07:00
memory_hotplug.c
mm/memory_hotplug: activate node before adding new memory blocks
2025-10-03 16:42:43 -07:00
memory-failure.c
mm, swap: cleanup swap cache API and add kerneldoc
2025-09-21 14:22:23 -07:00
memory-tiers.c
mm: re-enable kswapd when memory pressure subsides or demotion is toggled
2025-09-21 14:22:29 -07:00
memory.c
mm/fault: try to map the entire file folio in finish_fault()
2025-09-28 11:51:30 -07:00
mempolicy.c
mm: split folio_pte_batch() into folio_pte_batch() and folio_pte_batch_flags()
2025-07-19 18:59:45 -07:00
mempool.c
mm: mempool: fix crash in mempool_free() for zero-minimum pools
2025-08-02 12:06:13 -07:00
memremap.c
mm/memremap: remove unused get_dev_pagemap() parameter
2025-09-21 14:22:21 -07:00
memtest.c
…
migrate_device.c
treewide: remove MIGRATEPAGE_SUCCESS
2025-09-13 16:54:50 -07:00
migrate.c
mm: prevent poison consumption when splitting THP
2025-10-15 13:24:34 -07:00
mincore.c
mm, swap: use unified helper for swap cache look up
2025-09-21 14:22:22 -07:00
mlock.c
mm: folio_may_be_lru_cached() unless folio_test_large()
2025-09-13 13:05:36 -07:00
mm_init.c
Merge tag 'memblock-v6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
2025-10-04 11:03:10 -07:00
mm_slot.h
…
mmap_lock.c
mm: change vma_start_read() to drop RCU lock on failure
2025-09-13 16:54:43 -07:00
mmap.c
mm: specify separate file and vm_file params in vm_area_desc
2025-09-22 20:17:11 -07:00
mmu_gather.c
mm: remove redundant __GFP_NOWARN
2025-09-13 16:54:58 -07:00
mmu_notifier.c
Update Christoph's Email address and make it consistent
2025-05-12 23:50:31 -07:00
mmzone.c
mm: introduce memdesc_flags_t
2025-09-13 16:55:07 -07:00
mprotect.c
mm: pass page directly instead of using folio_page
2025-08-11 23:00:59 -07:00
mremap.c
mm/mremap: correctly account old mapping after MREMAP_DONTUNMAP remap
2025-10-21 15:46:17 -07:00
mseal.c
mm/mseal: rework mseal apply logic
2025-08-02 12:06:09 -07:00
msync.c
…
nommu.c
mm/nommu: convert kobjsize() to folios
2025-09-13 16:54:46 -07:00
numa_emulation.c
mm: numa,memblock: Use SZ_1M macro to denote bytes to MB conversion
2025-08-20 16:31:23 +03:00
numa_memblks.c
mm: numa,memblock: Use SZ_1M macro to denote bytes to MB conversion
2025-08-20 16:31:23 +03:00
numa.c
mm/numa: remove unnecessary local variable in alloc_node_data()
2025-05-12 23:50:38 -07:00
oom_kill.c
mm/oom_kill.c: fix inverted check
2025-09-23 14:14:16 -07:00
page_alloc.c
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
page_counter.c
page_counter: track failcnt only for legacy cgroups
2025-03-17 00:05:35 -07:00
page_ext.c
mm,page_ext: derive the node from the pfn
2025-07-13 16:38:16 -07:00
page_frag_cache.c
mm/page_alloc: export free_frozen_pages() instead of free_unref_page()
2025-01-13 22:40:31 -08:00
page_idle.c
sysfs: treewide: switch back to attribute_group::bin_attrs
2025-06-17 10:44:15 +02:00
page_io.c
mm, swap: tidy up swap device and cluster info helpers
2025-09-21 14:22:23 -07:00
page_isolation.c
mm/page_isolation: drop __folio_test_movable() check for large folios
2025-07-13 16:38:29 -07:00
page_owner.c
mm: don't spin in add_stack_record when gfp flags don't allow
2025-10-15 13:24:33 -07:00
page_poison.c
…
page_reporting.c
…
page_reporting.h
…
page_table_check.c
mm/page_table_check: Batch-check pmds/puds just like ptes
2025-05-09 13:43:07 +01:00
page_vma_mapped.c
mm/page_vma_mapped: track if the page is mapped across page table boundary
2025-09-28 11:51:29 -07:00
page-writeback.c
Merge tag 'fuse-update-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
2025-10-03 12:48:18 -07:00
pagewalk.c
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
percpu-internal.h
…
percpu-km.c
mm/mm/percpu-km: drop nth_page() usage within single allocation
2025-09-21 14:22:04 -07:00
percpu-stats.c
mm: remove outdated filename comment in percpu-stats.c
2025-07-13 16:38:23 -07:00
percpu-vm.c
…
percpu.c
percpu: fix race on alloc failed warning limit
2025-09-08 23:45:10 -07:00
pgalloc-track.h
…
pgtable-generic.c
mm: remove redundant pXd_devmap calls
2025-07-09 22:42:17 -07:00
process_vm_access.c
mm: refactor mm_access() to not return NULL
2024-11-05 16:56:23 -08:00
pt_reclaim.c
mm: pgtable: reclaim empty PTE page in madvise(MADV_DONTNEED)
2025-01-13 22:40:48 -08:00
ptdump.c
mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()
2025-07-09 22:42:20 -07:00
readahead.c
readahead: add trace points
2025-09-21 14:22:28 -07:00
rmap.c
mm/rmap: improve mlock tracking for large folios
2025-09-28 11:51:31 -07:00
rodata_test.c
mm/rodata_test: verify test data is unchanged, rather than non-zero
2025-01-13 22:40:38 -08:00
secretmem.c
Merge tag 'mm-stable-2025-07-30-15-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-07-31 14:57:54 -07:00
shmem_quota.c
shmem_quota: build the object file conditionally to the config option
2024-09-01 20:25:45 -07:00
shmem.c
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
show_mem.c
mm: re-enable kswapd when memory pressure subsides or demotion is toggled
2025-09-21 14:22:29 -07:00
shrinker_debug.c
mm/shrinker: fix name consistency issue in shrinker_debugfs_rename()
2025-03-17 00:05:40 -07:00
shrinker.c
mm: shrinker: avoid memleak in alloc_shrinker_info
2024-10-31 20:27:04 -07:00
shuffle.c
…
shuffle.h
…
slab_common.c
slab: Introduce kmalloc_nolock() and kfree_nolock().
2025-09-29 09:42:36 +02:00
slab.h
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
slub.c
slab: prevent infinite loop in kmalloc_nolock() with debugging
2025-11-06 08:13:12 +01:00
sparse-vmemmap.c
mm: introduce and use {pgd,p4d}_populate_kernel()
2025-08-27 22:45:44 -07:00
sparse.c
mm: introduce memdesc_nid()
2025-09-13 16:55:07 -07:00
swap_cgroup.c
mm: swap_cgroup: remove double initialization of locals
2025-03-17 22:06:58 -07:00
swap_state.c
mm, swap: implement dynamic allocation of swap table
2025-09-21 14:22:25 -07:00
swap_table.h
mm, swap: use a single page for swap table when the size fits
2025-09-21 14:22:25 -07:00
swap.c
mm: lru_add_drain_all() do local lru_add_drain() first
2025-09-21 14:22:32 -07:00
swap.h
mm, swap: implement dynamic allocation of swap table
2025-09-21 14:22:25 -07:00
swapfile.c
mm: swap: check for stable address space before operating on the VMA
2025-09-28 11:51:34 -07:00
truncate.c
Merge tag 'mm-stable-2025-06-01-14-06' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-06-02 16:00:26 -07:00
usercopy.c
mm: security: Check early if HARDENED_USERCOPY is enabled
2025-02-28 11:51:31 -08:00
userfaultfd.c
mm, swap: use unified helper for swap cache look up
2025-09-21 14:22:22 -07:00
util.c
fsnotify: pass correct offset to fsnotify_mmap_perm()
2025-10-07 14:01:12 -07:00
vma_exec.c
mm/vma: use vmg->target to specify target VMA for new VMA merge
2025-07-09 22:42:11 -07:00
vma_init.c
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
vma_internal.h
mm/vma: move brk() internals to mm/vma.c
2025-01-13 22:40:42 -08:00
vma.c
mm: specify separate file and vm_file params in vm_area_desc
2025-09-22 20:17:11 -07:00
vma.h
mm: specify separate file and vm_file params in vm_area_desc
2025-09-22 20:17:11 -07:00
vmalloc.c
mm/vmalloc: move resched point into alloc_vmap_area()
2025-09-23 14:14:16 -07:00
vmpressure.c
memcg: convert memcg->socket_pressure to u64
2025-07-24 19:12:32 -07:00
vmscan.c
mm: re-enable kswapd when memory pressure subsides or demotion is toggled
2025-09-21 14:22:29 -07:00
vmstat.c
mm: re-enable kswapd when memory pressure subsides or demotion is toggled
2025-09-21 14:22:29 -07:00
workingset.c
mm: introduce memdesc_flags_t
2025-09-13 16:55:07 -07:00
zpdesc.h
mm: zpdesc: minor naming and comment corrections
2025-09-21 14:21:59 -07:00
zsmalloc.c
mm: remove unused zpool layer
2025-09-21 14:21:59 -07:00
zswap.c
mm, swap: remove contention workaround for swap cache
2025-09-21 14:22:25 -07:00