linux-stable/lib
David Jeffery 106397376c sbitmap: fix batching wakeup
Current code supposes that it is enough to provide forward progress by
just waking up one wait queue after one completion batch is done.

Unfortunately this way isn't enough, cause waiter can be added to wait
queue just after it is woken up.

Follows one example(64 depth, wake_batch is 8)

1) all 64 tags are active

2) in each wait queue, there is only one single waiter

3) each time one completion batch(8 completions) wakes up just one
   waiter in each wait queue, then immediately one new sleeper is added
   to this wait queue

4) after 64 completions, 8 waiters are wakeup, and there are still 8
   waiters in each wait queue

5) after another 8 active tags are completed, only one waiter can be
   wakeup, and the other 7 can't be waken up anymore.

Turns out it isn't easy to fix this problem, so simply wakeup enough
waiters for single batch.

Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Chengming Zhou <zhouchengming@bytedance.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20230721095715.232728-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-07-21 11:40:20 -06:00
..
842
crypto This update includes the following changes: 2023-06-30 21:27:13 -07:00
dim
fonts
kunit - Arnd Bergmann has fixed a bunch of -Wmissing-prototypes in 2023-06-28 10:59:38 -07:00
livepatch
lz4
lzo
math
mpi
pldmfw
raid6 raid6: neon: add missing prototypes 2023-06-13 15:13:20 -07:00
reed_solomon
test_fortify
vdso
xz
zlib_deflate
zlib_dfltcc
zlib_inflate
zstd add intptr_t 2023-06-09 17:44:13 -07:00
.gitignore
argv_split.c
ashldi3.c
ashrdi3.c
asn1_decoder.c
asn1_encoder.c
assoc_array.c
atomic64_test.c
atomic64.c
audit.c
base64.c
bcd.c
bch.c
bitfield_kunit.c
bitmap.c
bitrev.c
bootconfig-data.S
bootconfig.c
bsearch.c
btree.c
bucket_locks.c
bug.c
build_OID_registry
buildid.c
bust_spinlocks.c
check_signature.c
checksum_kunit.c x86/csum: Improve performance of csum_partial 2023-05-25 10:55:18 -07:00
checksum.c
clz_ctz.c
clz_tab.c
cmdline_kunit.c
cmdline.c
cmpdi2.c
compat_audit.c
cpu_rmap.c lib: cpu_rmap: Fix potential use-after-free in irq_cpu_rmap_release() 2023-06-07 21:25:00 -07:00
cpumask_kunit.c
cpumask.c
crc4.c
crc7.c
crc8.c
crc16.c
crc32.c
crc32defs.h
crc32test.c
crc64-rocksoft.c
crc64.c
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c
ctype.c
debug_info.c
debug_locks.c
debugobjects.c debugobjects: Recheck debug_objects_enabled before reporting 2023-06-07 14:16:12 +02:00
dec_and_lock.c
decompress_bunzip2.c
decompress_inflate.c decompressor: provide missing prototypes 2023-06-09 17:44:17 -07:00
decompress_unlz4.c
decompress_unlzma.c
decompress_unlzo.c
decompress_unxz.c decompressor: provide missing prototypes 2023-06-09 17:44:17 -07:00
decompress_unzstd.c decompressor: provide missing prototypes 2023-06-09 17:44:17 -07:00
decompress.c
devmem_is_allowed.c lib: devmem_is_allowed: include linux/io.h 2023-06-09 17:44:15 -07:00
devres.c devres: show which resource was invalid in __devm_ioremap_resource() 2023-06-23 17:04:04 -07:00
dhry_1.c
dhry_2.c
dhry_run.c
dhry.h
digsig.c
dump_stack.c
dynamic_debug.c
dynamic_queue_limits.c
earlycpio.c
errname.c
error-inject.c
errseq.c
extable.c
fault-inject-usercopy.c
fault-inject.c
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
fortify_kunit.c fortify: Allow KUnit test to build without FORTIFY 2023-05-16 14:07:49 -07:00
gen_crc32table.c
gen_crc64table.c
genalloc.c
generic-radix-tree.c
glob.c
globtest.c
group_cpus.c
hashtable_test.c
hexdump.c
hweight.c
idr.c
inflate.c
interval_tree_test.c
interval_tree.c
iomap_copy.c
iomap.c
iommu-helper.c
iov_iter.c iov_iter: remove iov_iter_get_pages and iov_iter_get_pages_alloc 2023-06-16 10:08:09 -06:00
irq_poll.c
irq_regs.c
is_signed_type_kunit.c
is_single_threaded.c
kasprintf.c
Kconfig
Kconfig.debug - Arnd Bergmann has fixed a bunch of -Wmissing-prototypes in 2023-06-28 10:59:38 -07:00
Kconfig.kasan
Kconfig.kcsan
Kconfig.kfence
Kconfig.kgdb
Kconfig.kmsan
Kconfig.ubsan ubsan: remove cc-option test for UBSAN_TRAP 2023-05-17 12:01:54 -07:00
kfifo.c
klist.c
kobject_uevent.c
kobject.c kobject: Use return value of strreplace() 2023-06-05 15:31:12 -07:00
kstrtox.c
kstrtox.h
libcrc32c.c
linear_ranges.c
list_debug.c
list_sort.c
list-test.c
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
lockref.c
logic_iomem.c
logic_pio.c
lru_cache.c
lshrdi3.c
Makefile - Yosry Ahmed brought back some cgroup v1 stats in OOM logs. 2023-06-28 10:28:11 -07:00
maple_tree.c maple_tree: simplify and clean up mas_wr_node_store() 2023-06-09 16:25:45 -07:00
memcat_p.c
memcpy_kunit.c
memory-notifier-error-inject.c
memregion.c
memweight.c
muldi3.c
net_utils.c mac_pton: Clean up the header inclusions 2023-06-06 13:18:32 +02:00
netdev-notifier-error-inject.c
nlattr.c
nmi_backtrace.c
notifier-error-inject.c
notifier-error-inject.h
objagg.c
of-reconfig-notifier-error-inject.c
oid_registry.c
once.c
overflow_kunit.c overflow: Add struct_size_t() helper 2023-05-26 13:52:19 -07:00
packing.c
parman.c
parser.c
pci_iomap.c
percpu_counter.c
percpu_test.c
percpu-refcount.c
plist.c
pm-notifier-error-inject.c
polynomial.c
radix-tree.c radix-tree: move declarations to header 2023-06-12 11:31:50 -07:00
radix-tree.h radix-tree: move declarations to header 2023-06-12 11:31:50 -07:00
random32.c
ratelimit.c
rbtree_test.c
rbtree.c
rcuref.c
ref_tracker.c lib/ref_tracker: remove warnings in case of allocation failure 2023-06-05 15:28:42 -07:00
refcount.c
rhashtable.c
sbitmap.c sbitmap: fix batching wakeup 2023-07-21 11:40:20 -06:00
scatterlist.c Move netfs_extract_iter_to_sg() to lib/scatterlist.c 2023-06-08 13:42:33 +02:00
seq_buf.c
sg_pool.c
sg_split.c
siphash_kunit.c
siphash.c
slub_kunit.c
smp_processor_id.c
sort.c
stackdepot.c
stackinit_kunit.c
stmp_device.c
strcat_kunit.c string: Add Kunit tests for strcat() family 2023-05-16 14:08:02 -07:00
string_helpers.c lib/string_helpers: Change returned value of the strreplace() 2023-06-05 15:31:12 -07:00
string.c string: use __builtin_memcpy() in strlcpy/strlcat 2023-06-01 11:24:50 -07:00
strncpy_from_user.c
strnlen_user.c
strscpy_kunit.c
syscall.c
test_bitmap.c
test_bitops.c
test_bits.c
test_blackhole_dev.c
test_bpf.c bpf/tests: Use struct_size() 2023-05-31 12:58:38 +02:00
test_debug_virtual.c
test_dynamic_debug.c
test_firmware.c test_firmware: return ENOMEM instead of ENOSPC on failed memory allocation 2023-06-15 13:42:18 +02:00
test_fprobe.c fprobe: Pass return address to the handlers 2023-06-06 21:39:55 +09:00
test_fpu.c
test_free_pages.c
test_hash.c
test_hexdump.c
test_hmm_uapi.h
test_hmm.c
test_ida.c
test_kmod.c
test_kprobes.c
test_linear_ranges.c
test_list_sort.c
test_lockup.c
test_maple_tree.c maple_tree: update testing code for mas_{next,prev,walk} 2023-06-09 16:25:35 -07:00
test_memcat_p.c
test_meminit.c
test_min_heap.c
test_module.c
test_objagg.c
test_parman.c
test_printf.c
test_ref_tracker.c lib/ref_tracker: improve printing stats 2023-06-05 15:28:42 -07:00
test_rhashtable.c
test_scanf.c
test_sort.c
test_static_key_base.c
test_static_keys.c
test_string.c
test_sysctl.c test_sysclt: Test for registering a mount point 2023-06-18 02:32:54 -07:00
test_ubsan.c
test_user_copy.c
test_uuid.c
test_vmalloc.c lib/test_vmalloc.c: avoid garbage in page array 2023-06-12 11:31:51 -07:00
test_xarray.c
test-kstrtox.c
test-string_helpers.c
textsearch.c
timerqueue.c
trace_readwrite.c
ts_bm.c lib/ts_bm: reset initial match offset for every block of text 2023-06-26 13:26:39 +02:00
ts_fsm.c
ts_kmp.c
ubsan.c ubsan: add prototypes for internal functions 2023-05-30 16:42:01 -07:00
ubsan.h ubsan: add prototypes for internal functions 2023-05-30 16:42:01 -07:00
ucmpdi2.c
ucs2_string.c
usercopy.c
uuid.c
vsprintf.c
win_minmax.c
xarray.c radix-tree: move declarations to header 2023-06-12 11:31:50 -07:00
xxhash.c