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dfd3df31c9db752234d7d2e09bef2aeabb643ce4
linux/mm
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Uladzislau Rezki (Sony) dfd3df31c9 mm/slab/kvfree_rcu: Switch to WQ_MEM_RECLAIM wq 
Currently kvfree_rcu() APIs use a system workqueue which is
"system_unbound_wq" to driver RCU machinery to reclaim a memory.

Recently, it has been noted that the following kernel warning can
be observed:

<snip>
workqueue: WQ_MEM_RECLAIM nvme-wq:nvme_scan_work is flushing !WQ_MEM_RECLAIM events_unbound:kfree_rcu_work
  WARNING: CPU: 21 PID: 330 at kernel/workqueue.c:3719 check_flush_dependency+0x112/0x120
  Modules linked in: intel_uncore_frequency(E) intel_uncore_frequency_common(E) skx_edac(E) ...
  CPU: 21 UID: 0 PID: 330 Comm: kworker/u144:6 Tainted: G            E      6.13.2-0_g925d379822da #1
  Hardware name: Wiwynn Twin Lakes MP/Twin Lakes Passive MP, BIOS YMM20 02/01/2023
  Workqueue: nvme-wq nvme_scan_work
  RIP: 0010:check_flush_dependency+0x112/0x120
  Code: 05 9a 40 14 02 01 48 81 c6 c0 00 00 00 48 8b 50 18 48 81 c7 c0 00 00 00 48 89 f9 48 ...
  RSP: 0018:ffffc90000df7bd8 EFLAGS: 00010082
  RAX: 000000000000006a RBX: ffffffff81622390 RCX: 0000000000000027
  RDX: 00000000fffeffff RSI: 000000000057ffa8 RDI: ffff88907f960c88
  RBP: 0000000000000000 R08: ffffffff83068e50 R09: 000000000002fffd
  R10: 0000000000000004 R11: 0000000000000000 R12: ffff8881001a4400
  R13: 0000000000000000 R14: ffff88907f420fb8 R15: 0000000000000000
  FS:  0000000000000000(0000) GS:ffff88907f940000(0000) knlGS:0000000000000000
  CR2: 00007f60c3001000 CR3: 000000107d010005 CR4: 00000000007726f0
  PKRU: 55555554
  Call Trace:
   <TASK>
   ? __warn+0xa4/0x140
   ? check_flush_dependency+0x112/0x120
   ? report_bug+0xe1/0x140
   ? check_flush_dependency+0x112/0x120
   ? handle_bug+0x5e/0x90
   ? exc_invalid_op+0x16/0x40
   ? asm_exc_invalid_op+0x16/0x20
   ? timer_recalc_next_expiry+0x190/0x190
   ? check_flush_dependency+0x112/0x120
   ? check_flush_dependency+0x112/0x120
   __flush_work.llvm.1643880146586177030+0x174/0x2c0
   flush_rcu_work+0x28/0x30
   kvfree_rcu_barrier+0x12f/0x160
   kmem_cache_destroy+0x18/0x120
   bioset_exit+0x10c/0x150
   disk_release.llvm.6740012984264378178+0x61/0xd0
   device_release+0x4f/0x90
   kobject_put+0x95/0x180
   nvme_put_ns+0x23/0xc0
   nvme_remove_invalid_namespaces+0xb3/0xd0
   nvme_scan_work+0x342/0x490
   process_scheduled_works+0x1a2/0x370
   worker_thread+0x2ff/0x390
   ? pwq_release_workfn+0x1e0/0x1e0
   kthread+0xb1/0xe0
   ? __kthread_parkme+0x70/0x70
   ret_from_fork+0x30/0x40
   ? __kthread_parkme+0x70/0x70
   ret_from_fork_asm+0x11/0x20
   </TASK>
  ---[ end trace 0000000000000000 ]---
<snip>

To address this switch to use of independent WQ_MEM_RECLAIM
workqueue, so the rules are not violated from workqueue framework
point of view.

Apart of that, since kvfree_rcu() does reclaim memory it is worth
to go with WQ_MEM_RECLAIM type of wq because it is designed for
this purpose.

Fixes: 6c6c47b063 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"),
Reported-by: Keith Busch <kbusch@kernel.org>
Closes: https://lore.kernel.org/all/Z7iqJtCjHKfo8Kho@kbusch-mbp/
Cc: stable@vger.kernel.org
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
2025-03-04 08:51:53 +01:00
..
damon
mm/damon/core: use str_high_low() helper in damos_wmark_wait_us()
2025-01-25 20:22:46 -08:00
kasan
kasan: sw_tags: use str_on_off() helper in kasan_init_sw_tags()
2025-01-25 20:22:46 -08:00
kfence
kfence: skip __GFP_THISNODE allocations on NUMA systems
2025-02-01 03:53:26 -08:00
kmsan
mm/memblock: add memblock_alloc_or_panic interface
2025-01-25 20:22:38 -08:00
backing-dev.c
writeback: support retrieving per group debug writeback stats of bdi
2024-05-05 17:53:51 -07:00
balloon_compaction.c
mm: remove MIGRATE_SYNC_NO_COPY mode
2024-07-03 19:30:00 -07:00
bootmem_info.c
bootmem: stop using page->index
2024-11-07 14:38:07 -08:00
cma_debug.c
…
cma_sysfs.c
mm/cma: add sysfs file 'release_pages_success'
2024-02-22 10:24:57 -08:00
cma.c
cma: enforce non-zero pageblock_order during cma_init_reserved_mem()
2024-11-14 22:49:19 -08:00
cma.h
mm: change type of cma_area_count to unsigned int
2025-01-13 22:40:35 -08:00
compaction.c
mm: compaction: use the proper flag to determine watermarks
2025-02-01 03:53:25 -08:00
debug_page_alloc.c
mm: page_alloc: consolidate free page accounting
2024-04-25 20:56:04 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: Use pxdp_get() for accessing page table entries
2024-09-17 01:07:01 -07:00
debug.c
mm/debug: introduce VM_WARN_ON_VMG() to dump VMA merge state
2025-01-25 20:22:23 -08:00
dmapool_test.c
mm/dmapool: add MODULE_DESCRIPTION()
2024-07-03 19:29:58 -07:00
dmapool.c
mm/mempool/dmapool: remove CONFIG_DEBUG_SLAB ifdefs
2023-12-05 11:17:58 +01:00
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
alloc_tag: populate memory for module tags as needed
2024-11-07 14:25:16 -08:00
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 'mm-stable-2025-01-26-14-59' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-01-26 18:36:23 -08:00
folio-compat.c
mm/writeback: add folio_mark_dirty_lock()
2024-11-05 11:14:32 +01:00
gup_test.c
…
gup_test.h
…
gup.c
mm: gup: fix infinite loop within __get_longterm_locked
2025-02-01 03:53:27 -08:00
highmem.c
mm/highmem: make nr_free_highpages() return "unsigned long"
2024-07-03 19:30:06 -07:00
hmm.c
mm: provide mm_struct and address to huge_ptep_get()
2024-07-12 15:52:15 -07:00
huge_memory.c
mm/huge_memory: convert has_hwpoisoned into a pure folio flag
2025-01-25 20:22:41 -08:00
hugetlb_cgroup.c
mm/hugetlb-cgroup: convert hugetlb_cgroup_css_offline() to work on folios
2025-01-25 20:22:42 -08:00
hugetlb_vmemmap.c
treewide: const qualify ctl_tables where applicable
2025-01-28 13:48:37 +01:00
hugetlb_vmemmap.h
mm: hugetlb_vmemmap: fix reference to nonexistent file
2023-10-25 16:47:14 -07:00
hugetlb.c
mm/hugetlb: fix hugepage allocation for interleaved memory nodes
2025-02-01 03:53:27 -08:00
hwpoison-inject.c
mm/hwpoison: add MODULE_DESCRIPTION()
2024-07-03 19:29:58 -07:00
init-mm.c
mm: convert mm_lock_seq to a proper seqcount
2025-01-13 22:40:50 -08:00
internal.h
mm/truncate: add folio_unmap_invalidate() helper
2025-01-25 20:22:43 -08:00
interval_tree.c
…
io-mapping.c
…
ioremap.c
…
Kconfig
mm: add build-time option for hotplug memory default online type
2025-01-25 20:22:21 -08:00
Kconfig.debug
slub: Introduce CONFIG_SLUB_RCU_DEBUG
2024-08-27 14:12:51 +02:00
khugepaged.c
Merge tag 'mm-stable-2025-01-26-14-59' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-01-26 18:36:23 -08:00
kmemleak.c
mm: kmemleak: fix upper boundary check for physical address objects
2025-02-01 03:53:25 -08:00
ksm.c
ksm: add ksm involvement information for each process
2025-01-25 20:22:40 -08:00
list_lru.c
mm/list_lru: fix false warning of negative counter
2024-12-30 17:59:10 -08:00
maccess.c
kasan: migrate copy_user_test to kunit
2024-11-11 00:26:44 -08:00
madvise.c
mm: pgtable: reclaim empty PTE page in madvise(MADV_DONTNEED)
2025-01-13 22:40:48 -08:00
Makefile
mm: pgtable: reclaim empty PTE page in madvise(MADV_DONTNEED)
2025-01-13 22:40:48 -08:00
mapping_dirty_helpers.c
…
memblock.c
mm/memblock: add memblock_alloc_or_panic interface
2025-01-25 20:22:38 -08:00
memcontrol-v1.c
mm: remove the non-useful else after a break in a if statement
2025-01-13 22:40:40 -08:00
memcontrol-v1.h
mm: memcg: declare do_memsw_account inline
2024-12-05 19:54:46 -08:00
memcontrol.c
memcg: fix soft lockup in the OOM process
2025-01-25 20:22:35 -08:00
memfd.c
mm/memfd: use strncpy_from_user() to read memfd name
2025-01-25 20:22:40 -08:00
memory_hotplug.c
mm: add build-time option for hotplug memory default online type
2025-01-25 20:22:21 -08:00
memory-failure.c
treewide: const qualify ctl_tables where applicable
2025-01-28 13:48:37 +01:00
memory-tiers.c
memory tiers: use default_dram_perf_ref_source in log message
2024-09-26 14:01:44 -07:00
memory.c
Merge tag 'mm-stable-2025-01-26-14-59' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-01-26 18:36:23 -08:00
mempolicy.c
mm/hugetlb: rename isolate_hugetlb() to folio_isolate_hugetlb()
2025-01-25 20:22:41 -08:00
mempool.c
mm: fix xyz_noprof functions calling profiled functions
2024-06-05 19:19:26 -07:00
memremap.c
mm: convert put_devmap_managed_page_refs() to put_devmap_managed_folio_refs()
2024-05-05 17:53:49 -07:00
memtest.c
memtest: use {READ,WRITE}_ONCE in memory scanning
2024-03-13 12:12:21 -07:00
migrate_device.c
mm: remap unused subpages to shared zeropage when splitting isolated thp
2024-09-09 16:39:03 -07:00
migrate.c
mm: separate move/undo parts from migrate_pages_batch()
2025-01-25 20:22:45 -08:00
mincore.c
mm: provide mm_struct and address to huge_ptep_get()
2024-07-12 15:52:15 -07:00
mlock.c
mm/mlock: set the correct prev on failure
2024-11-07 14:14:58 -08:00
mm_init.c
mm/memmap: prevent double scanning of memmap by kmemleak
2025-01-25 20:22:30 -08:00
mm_slot.h
…
mmap_lock.c
mm: mmap_lock: optimize mmap_lock tracepoints
2025-01-13 22:40:34 -08:00
mmap.c
mm: make mmap_region() internal
2025-01-25 20:22:38 -08:00
mmu_gather.c
mm: pgtable: move __tlb_remove_table_one() in x86 to generic file
2025-01-25 20:22:23 -08:00
mmu_notifier.c
mm: move internal core VMA manipulation functions to own file
2024-09-01 20:25:54 -07:00
mmzone.c
mm: improve code consistency with zonelist_* helper functions
2024-09-01 20:25:55 -07:00
mprotect.c
mm: add PTE_MARKER_GUARD PTE marker
2024-11-11 00:26:44 -08:00
mremap.c
mm: clear uffd-wp PTE/PMD state on mremap()
2025-01-12 19:03:37 -08:00
mseal.c
mseal: remove can_do_mseal()
2025-01-13 22:40:51 -08:00
msync.c
…
nommu.c
fsnotify: generate pre-content permission event on page fault
2024-12-11 17:28:41 +01:00
numa_emulation.c
mm/fake-numa: allow later numa node hotplug
2025-01-25 20:22:29 -08:00
numa_memblks.c
mm/fake-numa: allow later numa node hotplug
2025-01-25 20:22:29 -08:00
numa.c
mm/memblock: add memblock_alloc_or_panic interface
2025-01-25 20:22:38 -08:00
oom_kill.c
treewide: const qualify ctl_tables where applicable
2025-01-28 13:48:37 +01:00
page_alloc.c
treewide: const qualify ctl_tables where applicable
2025-01-28 13:48:37 +01:00
page_counter.c
kernel/cgroup: Add "dmem" memory accounting cgroup
2025-01-06 17:24:38 +01:00
page_ext.c
mm: don't account memmap per-node
2024-08-15 22:16:14 -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
mm/page_idle: constify 'struct bin_attribute'
2025-01-25 20:22:19 -08:00
page_io.c
mm, swap: clean up device availability check
2025-01-25 20:22:36 -08:00
page_isolation.c
mm/page_isolation: don't pass gfp flags to start_isolate_page_range()
2025-01-13 22:40:44 -08:00
page_owner.c
mm/page-owner: use gfp_nested_mask() instead of open coded masking
2024-05-19 14:40:44 -07:00
page_poison.c
mm/page_poison: replace kmap_atomic() with kmap_local_page()
2023-12-10 16:51:50 -08:00
page_reporting.c
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
page_reporting.h
…
page_table_check.c
mm/page_table_check: fix crash on ZONE_DEVICE
2024-06-15 10:43:04 -07:00
page_vma_mapped.c
mm: mass constification of folio/page pointers
2024-11-07 14:38:07 -08:00
page-writeback.c
treewide: const qualify ctl_tables where applicable
2025-01-28 13:48:37 +01:00
pagewalk.c
mm: pagewalk: add the ability to install PTEs
2024-11-11 00:26:44 -08:00
percpu-internal.h
mm: remove CONFIG_MEMCG_KMEM
2024-07-10 12:14:54 -07:00
percpu-km.c
…
percpu-stats.c
…
percpu-vm.c
percpu: clean up all mappings when pcpu_map_pages() fails
2024-04-25 20:55:49 -07:00
percpu.c
mm/memblock: add memblock_alloc_or_panic interface
2025-01-25 20:22:38 -08:00
pgalloc-track.h
…
pgtable-generic.c
mm: add RCU annotation to pte_offset_map(_lock)
2024-12-18 19:04:43 -08:00
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: add check_wx_pages debugfs attribute
2024-02-22 10:24:47 -08:00
readahead.c
Merge tag 'mm-stable-2025-01-26-14-59' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-01-26 18:36:23 -08:00
rmap.c
mm: mass constification of folio/page pointers
2024-11-07 14:38:07 -08:00
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
add a string-to-qstr constructor
2025-01-27 19:25:45 -05:00
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-2025-01-26-14-59' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-01-26 18:36:23 -08:00
show_mem.c
mm/show_mem: use str_yes_no() helper in show_free_areas()
2024-11-07 14:38:08 -08:00
shrinker_debug.c
saner replacement for debugfs_rename()
2025-01-15 13:14:37 +01:00
shrinker.c
mm: shrinker: avoid memleak in alloc_shrinker_info
2024-10-31 20:27:04 -07:00
shuffle.c
…
shuffle.h
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
slab_common.c
mm/slab/kvfree_rcu: Switch to WQ_MEM_RECLAIM wq
2025-03-04 08:51:53 +01:00
slab.h
mm/slab: fix kernel-doc func param names
2025-01-13 10:22:04 +01:00
slub.c
Merge tag 'driver-core-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2025-01-28 12:25:12 -08:00
sparse-vmemmap.c
mm/memmap: prevent double scanning of memmap by kmemleak
2025-01-25 20:22:30 -08:00
sparse.c
mm/memblock: add memblock_alloc_or_panic interface
2025-01-25 20:22:38 -08:00
swap_cgroup.c
mm/swap_cgroup: decouple swap cgroup recording and clearing
2025-01-25 20:22:19 -08:00
swap_slots.c
mm, swap_slots: remove slot cache for freeing path
2025-01-25 20:22:37 -08:00
swap_state.c
mm: remove unnecessary calls to lru_add_drain
2025-01-25 20:22:21 -08:00
swap.c
mm/filemap: add read support for RWF_DONTCACHE
2025-01-25 20:22:43 -08:00
swap.h
mm: fix swap_read_folio_zeromap() for large folios with partial zeromap
2024-09-17 01:07:01 -07:00
swapfile.c
mm, swap: fix reclaim offset calculation error during allocation
2025-02-01 03:53:26 -08:00
truncate.c
mm/truncate: add folio_unmap_invalidate() helper
2025-01-25 20:22:43 -08:00
usercopy.c
…
userfaultfd.c
mm: userfaultfd: recheck dst_pmd entry in move_pages_pte()
2025-01-13 22:40:46 -08:00
util.c
mm: add comments to do_mmap(), mmap_region() and vm_mmap()
2025-01-13 22:40:59 -08:00
vma_internal.h
mm/vma: move brk() internals to mm/vma.c
2025-01-13 22:40:42 -08:00
vma.c
mm: make mmap_region() internal
2025-01-25 20:22:38 -08:00
vma.h
mm: make mmap_region() internal
2025-01-25 20:22:38 -08:00
vmalloc.c
mm: alloc_pages_bulk: rename API
2025-01-25 20:22:31 -08:00
vmpressure.c
eventfd: simplify eventfd_signal()
2023-11-28 14:08:38 +01:00
vmscan.c
mm/vmscan: accumulate nr_demoted for accurate demotion statistics
2025-02-01 03:53:24 -08:00
vmstat.c
vmstat: disable vmstat_work on vmstat_cpu_down_prep()
2025-01-12 19:03:38 -08:00
workingset.c
mm/mglru: rework workingset protection
2025-01-25 20:22:39 -08:00
z3fold.c
mm/z3fold: add __percpu annotation to *unbuddied pointer in struct z3fold_pool
2024-09-01 20:25:56 -07:00
zbud.c
mm: zpool: return pool size in pages
2024-04-25 20:55:48 -07:00
zpdesc.h
mm/zsmalloc: introduce __zpdesc_clear/set_zsmalloc()
2025-01-25 20:22:35 -08:00
zpool.c
mm: zpool: return pool size in pages
2024-04-25 20:55:48 -07:00
zsmalloc.c
mm/zsmalloc: add __maybe_unused attribute for is_first_zpdesc()
2025-02-01 03:53:23 -08:00
zswap.c
Merge tag 'mm-stable-2025-01-26-14-59' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-01-26 18:36:23 -08:00