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Paul E. McKenney d343732ddb ratelimit: Count misses due to lock contention 
The ___ratelimit() function simply returns zero ("do ratelimiting")
if the trylock fails, but does not adjust the ->missed field.  This
means that the resulting dropped printk()s are dropped silently, which
could seriously confuse people trying to do console-log-based debugging.
Therefore, increment the ->missed field upon trylock failure.

Link: https://lore.kernel.org/all/fbe93a52-365e-47fe-93a4-44a44547d601@paulmck-laptop/
Link: https://lore.kernel.org/all/20250423115409.3425-1-spasswolf@web.de/
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kuniyuki Iwashima <kuniyu@amazon.com>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
2025-05-08 16:13:26 -07:00
..
842
lib: 842: Improve error handling in sw842_compress()
2025-02-09 18:08:11 +08:00
crypto
crypto: lib/Kconfig - hide library options
2025-03-21 17:33:39 +08:00
dim
dim: pass dim_sample to net_dim() by reference
2024-11-03 12:36:54 -08:00
fonts
drm/log: select CONFIG_FONT_SUPPORT
2024-12-12 18:26:32 +01:00
kunit
Merge tag 'linux_kselftest-kunit-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
2025-01-22 12:32:39 -08:00
lz4
include/linux/lz4.h: add some missing macros
2025-01-24 22:47:28 -08:00
lzo
crypto: lzo - Fix compression buffer overrun
2025-03-08 16:23:22 +08:00
math
lib/prime_numbers: convert self-test to KUnit
2025-02-12 14:00:11 -08:00
pldmfw
pldmfw: enable selected component update
2025-01-16 13:04:41 -08:00
raid6
s390/vx: Convert cpu_has_vx() to cpu feature function
2025-03-04 17:18:07 +01:00
reed_solomon
…
test_fortify
fortify: use if_changed_dep to record header dependency in *.cmd files
2024-08-15 09:26:02 -07:00
tests
Merge tag 'modules-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux
2025-03-30 15:44:36 -07:00
vdso
mseal sysmap: generic vdso vvar mapping
2025-04-01 15:17:15 -07:00
xz
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
zlib_deflate
lib/zlib: drop EQUAL macro
2025-03-16 22:30:49 -07:00
zlib_dfltcc
…
zlib_inflate
…
zstd
Merge tag 'zstd-linus-v6.15-rc1' of https://github.com/terrelln/linux
2025-03-26 21:35:28 -07:00
.gitignore
fortify: refactor test_fortify Makefile to fix some build problems
2024-08-15 09:26:02 -07:00
alloc_tag.c
mm: avoid extra mem_alloc_profiling_enabled() checks
2025-03-16 22:06:03 -07:00
argv_split.c
…
ashldi3.c
…
ashrdi3.c
…
asn1_decoder.c
…
asn1_encoder.c
…
assoc_array.c
…
atomic64_test.c
x86/cpufeatures: Rename X86_CMPXCHG64 to X86_CX8
2025-02-28 11:42:34 +01:00
atomic64.c
atomic64: Use arch_spin_locks instead of raw_spin_locks
2025-01-22 15:07:01 -05:00
audit.c
…
base64.c
…
bcd.c
lib/bcd: optimize _bin2bcd() for improved performance
2024-09-01 20:43:33 -07:00
bch.c
…
bitmap-str.c
…
bitmap.c
…
bitrev.c
…
bootconfig-data.S
…
bootconfig.c
…
bsearch.c
…
btree.c
minmax: make generic MIN() and MAX() macros available everywhere
2024-07-28 15:49:18 -07:00
bucket_locks.c
…
bug.c
bug: Use RCU instead RCU-sched to protect module_bug_list.
2025-03-10 11:54:46 +01:00
build_OID_registry
…
buildid.c
lib/buildid: Handle memfd_secret() files in build_id_parse()
2024-10-17 21:30:32 +02:00
bust_spinlocks.c
…
check_signature.c
…
checksum.c
net: checksum: Move from32to16() to generic header
2024-10-30 15:29:59 +01:00
closure.c
closures: use seq_putc() in debug_show()
2024-09-01 20:43:29 -07:00
clz_ctz.c
…
clz_tab.c
…
cmdline.c
…
cmpdi2.c
…
cmpxchg-emu.c
…
codetag.c
alloc_tag: support for page allocation tag compression
2024-11-07 14:25:16 -08:00
compat_audit.c
…
cpu_rmap.c
net: move aRFS rmap management and CPU affinity to core
2025-02-26 19:51:37 -08:00
cpumask.c
cpumask: drop cpumask_next_wrap_old()
2025-02-24 16:37:23 -05:00
crc4.c
…
crc7.c
lib/crc7: unexport crc7_be_syndrome_table
2025-03-10 09:29:29 -07:00
crc8.c
…
crc16.c
…
crc32.c
lib/crc32: remove "_le" from crc32c base and arch functions
2025-02-08 20:06:30 -08:00
crc64.c
lib/crc64: add support for arch-optimized implementations
2025-02-08 20:06:28 -08:00
crc-ccitt.c
…
crc-itu-t.c
…
crc-t10dif.c
lib/crc-t10dif: stop wrapping the crypto API
2024-12-01 17:23:13 -08:00
ctype.c
…
debug_info.c
…
debug_locks.c
…
debugobjects.c
debugobjects: Track object usage to avoid premature freeing of objects
2024-10-15 17:30:33 +02:00
dec_and_lock.c
…
decompress_bunzip2.c
decompress_bunzip2: fix rare decompression failure
2024-07-26 14:33:09 -07:00
decompress_inflate.c
…
decompress_unlz4.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
decompress_unlzma.c
minmax: make generic MIN() and MAX() macros available everywhere
2024-07-28 15:49:18 -07:00
decompress_unlzo.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
decompress_unxz.c
xz: remove XZ_EXTERN and extern from functions
2024-09-01 20:43:27 -07:00
decompress_unzstd.c
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decompress.c
…
devmem_is_allowed.c
…
devres.c
lib: devres: Simplify API devm_ioport_unmap() implementation
2024-10-14 08:21:09 +02:00
dhry_1.c
…
dhry_2.c
…
dhry_run.c
…
dhry.h
…
digsig.c
…
dump_stack.c
lib/dump_stack: Use preempt_model_str()
2025-03-17 11:23:39 +01:00
dynamic_debug.c
dyndbg: use seq_putc() in ddebug_proc_show()
2024-09-01 20:43:29 -07:00
dynamic_queue_limits.c
dql: Fix dql->limit value when reset.
2025-03-25 06:26:55 -07:00
earlycpio.c
…
errname.c
…
error-inject.c
…
errseq.c
…
extable.c
…
fault-inject-usercopy.c
…
fault-inject.c
fault-inject: use prandom where cryptographically secure randomness is not needed
2025-01-12 20:21:00 -08:00
fdt_addresses.c
…
fdt_empty_tree.c
…
fdt_ro.c
…
fdt_rw.c
…
fdt_strerror.c
…
fdt_sw.c
…
fdt_wip.c
…
fdt.c
…
find_bit_benchmark.c
…
find_bit.c
…
flex_proportions.c
…
fw_table.c
…
gen_crc32table.c
lib/crc32: remove other generic implementations
2025-01-29 09:10:35 -08:00
gen_crc64table.c
lib/crc64: rename CRC64-Rocksoft to CRC64-NVME
2025-02-08 20:06:24 -08:00
genalloc.c
…
generic-radix-tree.c
lib/generic-radix-tree.c: add preallocation
2024-09-09 09:41:47 -04:00
glob.c
lib: glob.c: added null check for character class
2024-09-09 16:47:41 -07:00
globtest.c
…
group_cpus.c
…
hexdump.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
hweight.c
…
idr.c
ida: Add ida_find_first_range()
2025-03-25 10:18:31 -03:00
inflate.c
lib/inflate.c: remove dead code
2025-01-12 20:21:15 -08:00
interval_tree_test.c
lib/interval_tree: add test case for span iteration
2025-03-17 12:17:01 -07:00
interval_tree.c
lib/interval_tree: fix the comment of interval_tree_span_iter_next_gap()
2025-03-17 12:17:01 -07:00
iomap_copy.c
…
iomap.c
asm-generic/io.h: rework split ioread64/iowrite64 helpers
2025-03-01 21:00:22 +01:00
iomem_copy.c
lib/iomem_copy: fix kerneldoc format style
2024-10-29 07:14:29 +00:00
iommu-helper.c
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iov_iter.c
mm: decline to manipulate the refcount on a slab page
2025-03-16 17:40:26 -07:00
irq_poll.c
softirq: Remove unused 'action' parameter from action callback
2024-08-20 17:13:40 +02:00
irq_regs.c
…
is_single_threaded.c
…
kasprintf.c
…
Kconfig
lib/crc: remove unnecessary prompt for CONFIG_CRC64
2025-03-10 09:29:29 -07:00
Kconfig.debug
Merge tag 'kbuild-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2025-04-05 15:46:50 -07:00
Kconfig.kasan
kasan: delete CONFIG_KASAN_MODULE_TEST
2024-11-11 00:26:44 -08:00
Kconfig.kcsan
…
Kconfig.kfence
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Kconfig.kgdb
Documentation: move dev-tools debugging files to process/debugging/
2024-12-17 13:46:53 -07:00
Kconfig.kmsan
…
Kconfig.ubsan
ubsan/overflow: Enable ignorelist parsing and add type filter
2025-03-07 19:58:05 -08:00
kfifo.c
…
klist.c
…
kobject_uevent.c
…
kobject.c
kobject: Remove unused functions
2025-01-14 19:45:35 +01:00
kstrtox.c
…
kstrtox.h
…
linear_ranges.c
…
list_debug.c
lib/list_debug.c: add object information in case of invalid object
2025-01-25 20:22:23 -08:00
list_sort.c
lib/list_sort: clarify comparison function requirements in list_sort()
2025-01-24 22:47:23 -08:00
llist.c
…
locking-selftest-hardirq.h
…
locking-selftest-mutex.h
…
locking-selftest-rlock-hardirq.h
…
locking-selftest-rlock-softirq.h
…
locking-selftest-rlock.h
…
locking-selftest-rsem.h
…
locking-selftest-rtmutex.h
…
locking-selftest-softirq.h
…
locking-selftest-spin-hardirq.h
…
locking-selftest-spin-softirq.h
…
locking-selftest-spin.h
…
locking-selftest-wlock-hardirq.h
…
locking-selftest-wlock-softirq.h
…
locking-selftest-wlock.h
…
locking-selftest-wsem.h
…
locking-selftest.c
locking/ww_mutex: Fix ww_mutex dummy lockdep map selftest warnings
2024-12-02 12:16:57 +01:00
lockref.c
lockref: use bool for false/true returns
2025-01-16 11:48:11 +01:00
logic_iomem.c
…
logic_pio.c
logic_pio: Constify fwnode_handle
2024-10-14 16:33:24 -05:00
lru_cache.c
lib/lru_cache: fix spelling mistake "colision"->"collision"
2024-09-01 20:43:29 -07:00
lshrdi3.c
…
lwq.c
…
Makefile
Merge tag 'net-next-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2025-03-26 21:48:21 -07:00
maple_tree.c
maple_tree: remove a BUG_ON() in mas_alloc_nodes()
2025-03-16 22:06:15 -07:00
memcat_p.c
…
memory-notifier-error-inject.c
…
memregion.c
…
memweight.c
…
min_heap.c
lib min_heap: use size_t for array size and index variables
2025-03-16 23:24:14 -07:00
muldi3.c
…
net_utils.c
net, treewide: define and use MAC_ADDR_STR_LEN
2025-03-19 19:17:58 +01:00
netdev-notifier-error-inject.c
…
nlattr.c
…
nmi_backtrace.c
…
notifier-error-inject.c
…
notifier-error-inject.h
…
objagg.c
…
objpool.c
objpool: fix to make percpu slot allocation more robust
2024-11-07 14:14:58 -08:00
of-reconfig-notifier-error-inject.c
…
oid_registry.c
…
once.c
…
packing_test.c
lib: packing: add pack_fields() and unpack_fields()
2024-12-11 20:13:00 -08:00
packing.c
lib: packing: add pack_fields() and unpack_fields()
2024-12-11 20:13:00 -08:00
parman.c
…
parser.c
Documentation: core-api: add generic parser docbook
2024-12-11 09:07:40 -07:00
percpu_counter.c
lib/percpu_counter: add missing __percpu qualifier to a cast
2024-09-01 20:43:34 -07:00
percpu_test.c
percpu: add a test case for the specific 64-bit value addition
2024-11-06 20:11:14 -08:00
percpu-refcount.c
…
plist.c
lib/plist.c: add shortcut for plist_requeue()
2025-03-16 22:30:47 -07:00
pm-notifier-error-inject.c
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polynomial.c
…
radix-tree.c
…
radix-tree.h
…
random32.c
Merge tag 'random-6.13-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random
2024-11-19 10:43:44 -08:00
ratelimit.c
ratelimit: Count misses due to lock contention
2025-05-08 16:13:26 -07:00
rbtree_test.c
lib/rbtree: add random seed
2025-03-17 12:17:00 -07:00
rbtree.c
…
rcuref.c
rcuref: Plug slowpath race in rcuref_put()
2025-01-29 15:21:31 +01:00
ref_tracker.c
…
refcount.c
…
rhashtable.c
Merge tag 'mm-nonmm-stable-2025-01-24-23-16' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-01-26 17:50:53 -08:00
sbitmap.c
lib/sbitmap: define swap_lock as raw_spinlock_t
2024-09-20 00:20:06 -06:00
scatterlist.c
lib/scatterlist: Add SG_MITER_LOCAL and use it
2025-03-21 17:33:38 +08:00
seq_buf.c
…
sg_pool.c
…
sg_split.c
lib: scatterlist: fix sg_split_phys to preserve original scatterlist offsets
2025-04-01 15:20:46 -07:00
siphash.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
smp_processor_id.c
…
sort.c
lib/sort.c: add _nonatomic() variants with cond_resched()
2025-04-01 15:20:46 -07:00
stackdepot.c
mm, bpf: Introduce free_pages_nolock()
2025-02-27 09:36:18 -08:00
stmp_device.c
…
string_helpers.c
lib: string_helpers: silence snprintf() output truncation warning
2024-11-02 13:08:55 -07:00
string.c
strscpy: write destination buffer only once
2024-12-01 12:17:16 -08:00
strncpy_from_user.c
kasan: move checks to do_strncpy_from_user
2024-11-11 00:26:43 -08:00
strnlen_user.c
x86: support user address masking instead of non-speculative conditional
2024-08-19 11:31:18 -07:00
syscall.c
…
test_bitmap.c
bitmap: remove _check_eq_u32_array
2025-02-18 11:51:21 -05:00
test_bitops.c
…
test_bpf.c
bpf/tests: Add 32 bits only long conditional jump tests
2025-01-06 16:10:19 +01:00
test_debug_virtual.c
…
test_dynamic_debug.c
…
test_firmware.c
module: Convert symbol namespace to string literal
2024-12-02 11:34:44 -08:00
test_fpu_glue.c
lib: fix the NULL vs IS_ERR() bug for debugfs_create_dir()
2024-09-01 20:43:40 -07:00
test_fpu_impl.c
…
test_fpu.h
…
test_free_pages.c
…
test_hexdump.c
…
test_hmm_uapi.h
…
test_hmm.c
mm: allow compound zone device pages
2025-03-17 22:06:39 -07:00
test_ida.c
ida: Add ida_find_first_range()
2025-03-25 10:18:31 -03:00
test_kmod.c
…
test_lockup.c
…
test_maple_tree.c
test_maple_tree: test exhausted upper limit of mtree_alloc_cyclic()
2025-01-25 20:22:19 -08:00
test_memcat_p.c
…
test_meminit.c
…
test_min_heap.c
lib/test_min_heap: use inline min heap variants to reduce attack vector
2025-01-12 20:20:57 -08:00
test_module.c
…
test_objagg.c
…
test_objpool.c
lib: test_objpool: Switch to use hrtimer_setup()
2025-02-18 10:32:32 +01:00
test_parman.c
lib/test_parman: Include <linux/prandom.h> instead of <linux/random.h>
2024-10-03 18:20:27 +02:00
test_ref_tracker.c
…
test_rhashtable.c
…
test_static_key_base.c
…
test_static_keys.c
…
test_sysctl.c
treewide: const qualify ctl_tables where applicable
2025-01-28 13:48:37 +01:00
test_ubsan.c
ubsan/overflow: Rework integer overflow sanitizer option to turn on everything
2025-03-07 19:58:05 -08:00
test_uuid.c
…
test_vmalloc.c
mm: alloc_pages_bulk: rename API
2025-01-25 20:22:31 -08:00
test_xarray.c
xarray: add xas_try_split() to split a multi-index entry
2025-03-17 22:06:59 -07:00
test-kstrtox.c
…
textsearch.c
…
timerqueue.c
…
trace_readwrite.c
…
ts_bm.c
…
ts_fsm.c
…
ts_kmp.c
…
ubsan.c
ubsan/overflow: Rework integer overflow sanitizer option to turn on everything
2025-03-07 19:58:05 -08:00
ubsan.h
ubsan/overflow: Rework integer overflow sanitizer option to turn on everything
2025-03-07 19:58:05 -08:00
ucmpdi2.c
…
ucs2_string.c
…
union_find.c
Union-Find: add a new module in kernel library
2024-07-30 13:04:36 -10:00
usercopy.c
…
uuid.c
…
vsprintf.c
Merge tag 'printk-for-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
2025-04-02 10:05:55 -07:00
win_minmax.c
rxrpc: Generate rtt_min
2024-12-09 13:48:29 -08:00
xarray.c
mm/filemap: use xas_try_split() in __filemap_add_folio()
2025-03-17 22:07:01 -07:00
xxhash.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00