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Rafael Aquini a850e932df mm: vmalloc: add cond_resched() in __vunmap() 
On non-preemptible kernel builds the watchdog can complain about soft
lockups when vfree() is called against large vmalloc areas:

[  210.851798] kvmalloc-test: vmalloc(2199023255552) succeeded
[  238.654842] watchdog: BUG: soft lockup - CPU#181 stuck for 26s! [rmmod:5203]
[  238.662716] Modules linked in: kvmalloc_test(OE-) ...
[  238.772671] CPU: 181 PID: 5203 Comm: rmmod Tainted: G S         OE     5.13.0-rc7+ #1
[  238.781413] Hardware name: Intel Corporation PURLEY/PURLEY, BIOS PLYXCRB1.86B.0553.D01.1809190614 09/19/2018
[  238.792383] RIP: 0010:free_unref_page+0x52/0x60
[  238.797447] Code: 48 c1 fd 06 48 89 ee e8 9c d0 ff ff 84 c0 74 19 9c 41 5c fa 48 89 ee 48 89 df e8 b9 ea ff ff 41 f7 c4 00 02 00 00 74 01 fb 5b <5d> 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f0 29 77
[  238.818406] RSP: 0018:ffffb4d87868fe98 EFLAGS: 00000206
[  238.824236] RAX: 0000000000000000 RBX: 000000001da0c945 RCX: ffffb4d87868fe40
[  238.832200] RDX: ffffd79d3beed108 RSI: ffffd7998501dc08 RDI: ffff9c6fbffd7010
[  238.840166] RBP: 000000000d518cbd R08: ffffd7998501dc08 R09: 0000000000000001
[  238.848131] R10: 0000000000000000 R11: ffffd79d3beee088 R12: 0000000000000202
[  238.856095] R13: ffff9e5be3eceec0 R14: 0000000000000000 R15: 0000000000000000
[  238.864059] FS:  00007fe082c2d740(0000) GS:ffff9f4c69b40000(0000) knlGS:0000000000000000
[  238.873089] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  238.879503] CR2: 000055a000611128 CR3: 000000f6094f6006 CR4: 00000000007706e0
[  238.887467] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  238.895433] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  238.903397] PKRU: 55555554
[  238.906417] Call Trace:
[  238.909149]  __vunmap+0x17c/0x220
[  238.912851]  __x64_sys_delete_module+0x13a/0x250
[  238.918008]  ? syscall_trace_enter.isra.20+0x13c/0x1b0
[  238.923746]  do_syscall_64+0x39/0x80
[  238.927740]  entry_SYSCALL_64_after_hwframe+0x44/0xae

Like in other range zapping routines that iterate over a large list, lets
just add cond_resched() within __vunmap()'s page-releasing loop in order
to avoid the watchdog splats.

Link: https://lkml.kernel.org/r/20210622225030.478384-1-aquini@redhat.com
Signed-off-by: Rafael Aquini <aquini@redhat.com>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Aaron Tomlin <atomlin@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-06-29 10:53:52 -07:00
..
kasan
mm/slub, kunit: add a KUnit test for SLUB debugging functionality
2021-06-29 10:53:46 -07:00
kfence
mm, slub: change run-time assertion in kmalloc_index() to compile-time
2021-06-29 10:53:46 -07:00
backing-dev.c
writeback, cgroup: release dying cgwbs by switching attached inodes
2021-06-29 10:53:48 -07:00
balloon_compaction.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
cleancache.c
Driver Core and debugfs changes for 5.3-rc1
2019-07-12 12:24:03 -07:00
cma_debug.c
mm/cma: change cma mutex to irq safe spinlock
2021-05-05 11:27:21 -07:00
cma_sysfs.c
mm: cma: support sysfs
2021-05-05 11:27:24 -07:00
cma.c
mm: use proper type for cma_[alloc|release]
2021-05-05 11:27:24 -07:00
cma.h
mm: cma: support sysfs
2021-05-05 11:27:24 -07:00
compaction.c
mm: memcontrol: remove the pgdata parameter of mem_cgroup_page_lruvec
2021-06-29 10:53:50 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: ensure THP availability via has_transparent_hugepage()
2021-06-29 10:53:47 -07:00
debug.c
mm/debug: improve memcg debugging
2021-02-24 13:38:27 -08:00
dmapool.c
mm/dmapool: use DEVICE_ATTR_RO macro
2021-06-29 10:53:52 -07:00
early_ioremap.c
mm/early_ioremap.c: use __func__ instead of function name
2021-02-26 09:41:02 -08:00
fadvise.c
mm, fadvise: improve the expensive remote LRU cache draining after FADV_DONTNEED
2020-10-13 18:38:29 -07:00
failslab.c
mm/failslab.c: by default, do not fail allocations with direct reclaim only
2019-07-12 11:05:43 -07:00
filemap.c
mm: charge active memcg when no mm is set
2021-06-29 10:53:50 -07:00
frontswap.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
gup_test.c
selftests/vm: gup_test: test faulting in kernel, and verify pinnable pages
2021-05-05 11:27:26 -07:00
gup_test.h
selftests/vm: gup_test: fix test flag
2021-05-05 11:27:26 -07:00
gup.c
mm: gup: pack has_pinned in MMF_HAS_PINNED
2021-06-29 10:53:48 -07:00
highmem.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
hmm.c
mm: do page fault accounting in handle_mm_fault
2020-08-12 10:58:02 -07:00
huge_memory.c
mm: thp: replace DEBUG_VM BUG with VM_WARN when unmap fails for split
2021-06-16 09:24:42 -07:00
hugetlb_cgroup.c
hugetlb: make free_huge_page irq safe
2021-05-05 11:27:22 -07:00
hugetlb.c
mm, futex: fix shared futex pgoff on shmem huge page
2021-06-24 19:40:54 -07:00
hwpoison-inject.c
mm,hwpoison-inject: don't pin for hwpoison_filter
2020-10-16 11:11:16 -07:00
init-mm.c
mm/gup: prevent gup_fast from racing with COW during fork
2020-12-15 12:13:39 -08:00
internal.h
mm: memcg/slab: create a new set of kmalloc-cg-<n> caches
2021-06-29 10:53:49 -07:00
interval_tree.c
mm/interval_tree: add comments to improve code readability
2021-04-30 11:20:38 -07:00
io-mapping.c
mm: add a io_mapping_map_user helper
2021-04-30 11:20:39 -07:00
ioremap.c
mm/ioremap: fix iomap_max_page_shift
2021-05-14 19:41:32 -07:00
Kconfig
mm,memory_hotplug: allocate memmap from the added memory range
2021-05-05 11:27:26 -07:00
Kconfig.debug
mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO
2020-12-15 12:13:46 -08:00
khugepaged.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
kmemleak.c
mm/kmemleak: fix possible wrong memory scanning period
2021-06-29 10:53:47 -07:00
ksm.c
mm/ksm: use vma_lookup() in find_mergeable_vma()
2021-06-29 10:53:52 -07:00
list_lru.c
mm: vmscan: consolidate shrinker_maps handling code
2021-05-05 11:27:23 -07:00
maccess.c
uaccess: add force_uaccess_{begin,end} helpers
2020-08-12 10:57:59 -07:00
madvise.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
Makefile
mm,memory_hotplug: add kernel boot option to enable memmap_on_memory
2021-05-05 11:27:27 -07:00
mapping_dirty_helpers.c
mm/mapping_dirty_helpers: guard hugepage pud's usage
2021-04-16 16:10:37 -07:00
memblock.c
memblock: remove return value of memblock_free_all()
2021-02-22 13:01:23 -08:00
memcontrol.c
loop: charge i/o to mem and blk cg
2021-06-29 10:53:50 -07:00
memfd.c
mm: page cache: store only head pages in i_pages
2019-09-24 15:54:08 -07:00
memory_hotplug.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
memory-failure.c
mm/hwpoison: do not lock page again when me_huge_page() successfully recovers
2021-06-24 19:40:54 -07:00
memory.c
mm/memory.c: use vma_lookup() in __access_remote_vm()
2021-06-29 10:53:52 -07:00
mempolicy.c
mm/mempolicy: use vma_lookup() in __access_remote_vm()
2021-06-29 10:53:52 -07:00
mempool.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
memremap.c
mm/memremap.c: fix improper SPDX comment style
2021-04-30 11:20:37 -07:00
memtest.c
…
migrate.c
mm/migrate: use vma_lookup() in do_pages_stat_array()
2021-06-29 10:53:52 -07:00
mincore.c
inode: make init and permission helpers idmapped mount aware
2021-01-24 14:27:16 +01:00
mlock.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
mm_init.c
include/linux/page-flags-layout.h: cleanups
2021-04-30 11:20:42 -07:00
mmap_lock.c
mm: mmap_lock: use local locks instead of disabling preemption
2021-06-29 10:53:47 -07:00
mmap.c
mm/mmap: use find_vma_intersection() in do_mmap() for overlap
2021-06-29 10:53:51 -07:00
mmu_gather.c
mm: eliminate "expecting prototype" kernel-doc warnings
2021-04-16 16:10:36 -07:00
mmu_notifier.c
mm/mmu_notifiers: ensure range_end() is paired with range_start()
2021-03-25 09:22:55 -07:00
mmzone.c
mm/lru: replace pgdat lru_lock with lruvec lock
2020-12-15 14:48:04 -08:00
mprotect.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
mremap.c
mm/mremap: use vma_lookup() in vma_to_resize()
2021-06-29 10:53:52 -07:00
msync.c
mm/msync: exit early when the flags is an MS_ASYNC and start < vm_start
2021-04-30 11:20:37 -07:00
nommu.c
mm: ignore MAP_EXECUTABLE in ksys_mmap_pgoff()
2021-06-29 10:53:50 -07:00
oom_kill.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
page_alloc.c
mm/page_alloc: correct return value of populated elements if bulk array is populated
2021-06-29 10:53:45 -07:00
page_counter.c
mm: page_counter: mitigate consequences of a page_counter underflow
2021-04-30 11:20:38 -07:00
page_ext.c
mm: fix some spelling mistakes in comments
2020-12-15 22:46:19 -08:00
page_idle.c
mm: page_idle_get_page() does not need lru_lock
2020-12-15 14:48:03 -08:00
page_io.c
swap: fix swapfile read/write offset
2021-03-02 17:25:46 -07:00
page_isolation.c
mm/page_isolation: do not isolate the max order page
2020-12-15 12:13:45 -08:00
page_owner.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
page_poison.c
mm: page_poison: print page info when corruption is caught
2021-04-30 11:20:36 -07:00
page_reporting.c
mm/page_reporting: allow driver to specify reporting order
2021-06-29 10:53:47 -07:00
page_reporting.h
mm/page_reporting: export reporting order as module parameter
2021-06-29 10:53:47 -07:00
page_vma_mapped.c
mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk()
2021-06-24 19:40:53 -07:00
page-writeback.c
fs: remove noop_set_page_dirty()
2021-06-29 10:53:48 -07:00
pagewalk.c
mm: pagewalk: fix walk for hugepage tables
2021-06-29 10:53:49 -07:00
percpu-internal.h
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
percpu-km.c
mm: memcg/percpu: account percpu memory to memory cgroups
2020-08-12 10:57:55 -07:00
percpu-stats.c
percpu: make pcpu_nr_empty_pop_pages per chunk type
2021-04-09 13:58:38 +00:00
percpu-vm.c
mm/vmalloc: remove unmap_kernel_range
2021-04-30 11:20:40 -07:00
percpu.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
pgalloc-track.h
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
pgtable-generic.c
mm/thp: fix __split_huge_pmd_locked() on shmem migration entry
2021-06-16 09:24:42 -07:00
process_vm_access.c
mm/process_vm_access.c: remove duplicate include
2021-05-05 11:27:27 -07:00
ptdump.c
mm: ptdump: fix build failure
2021-04-16 16:10:37 -07:00
readahead.c
mm: Implement readahead_control pageset expansion
2021-04-23 10:14:29 +01:00
rmap.c
mm/thp: fix page_address_in_vma() on file THP tails
2021-06-16 09:24:42 -07:00
rodata_test.c
mm/rodata_test.c: fix missing function declaration
2020-08-21 09:52:53 -07:00
shmem.c
mm: charge active memcg when no mm is set
2021-06-29 10:53:50 -07:00
shuffle.c
mm: eliminate "expecting prototype" kernel-doc warnings
2021-04-16 16:10:36 -07:00
shuffle.h
mm/shuffle: fix section mismatch warning
2021-05-22 15:09:07 -10:00
slab_common.c
mm: memcg/slab: disable cache merging for KMALLOC_NORMAL caches
2021-06-29 10:53:49 -07:00
slab.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
slab.h
mm: memcg/slab: properly set up gfp flags for objcg pointer array
2021-06-29 10:53:49 -07:00
slob.c
mm: Don't build mm_dump_obj() on CONFIG_PRINTK=n kernels
2021-03-08 14:18:46 -08:00
slub.c
mm/slub: add taint after the errors are printed
2021-06-29 10:53:47 -07:00
sparse-vmemmap.c
mm/sparse: only sub-section aligned range would be populated
2020-08-07 11:33:27 -07:00
sparse.c
mm/sparse: fix check_usemap_section_nr warnings
2021-06-16 09:24:43 -07:00
swap_cgroup.c
mm: memcontrol: make swap tracking an integral part of memory control
2020-06-03 20:09:48 -07:00
swap_slots.c
mm/swap_slots.c: delete meaningless forward declarations
2021-06-29 10:53:49 -07:00
swap_state.c
swap: check mapping_empty() for swap cache before being freed
2021-06-29 10:53:49 -07:00
swap.c
mm: memcontrol: remove the pgdata parameter of mem_cgroup_page_lruvec
2021-06-29 10:53:50 -07:00
swapfile.c
mm, swap: remove unnecessary smp_rmb() in swap_type_to_swap_info()
2021-06-29 10:53:49 -07:00
truncate.c
mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page()
2021-06-16 09:24:42 -07:00
usercopy.c
mm/usercopy.c: delete duplicated word
2020-08-12 10:57:58 -07:00
userfaultfd.c
userfaultfd: hugetlbfs: fix new flag usage in error path
2021-05-22 15:09:07 -10:00
util.c
mm/util.c: fix typo
2021-05-05 11:27:25 -07:00
vmacache.c
kernel: better document the use_mm/unuse_mm API contract
2020-06-10 19:14:18 -07:00
vmalloc.c
mm: vmalloc: add cond_resched() in __vunmap()
2021-06-29 10:53:52 -07:00
vmpressure.c
mm: vmpressure: use mem_cgroup_is_root API
2020-04-02 09:35:31 -07:00
vmscan.c
mm: vmscan: remove noinline_for_stack
2021-06-29 10:53:50 -07:00
vmstat.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
workingset.c
mm: memcontrol: remove the pgdata parameter of mem_cgroup_page_lruvec
2021-06-29 10:53:50 -07:00
z3fold.c
mm: fix some typos and code style problems
2021-05-07 00:26:33 -07:00
zbud.c
mm: set the sleep_mapped to true for zbud and z3fold
2021-02-26 09:41:01 -08:00
zpool.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
zsmalloc.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
zswap.c
mm/zswap.c: switch from strlcpy to strscpy
2021-05-05 11:27:27 -07:00