Sidhartha Kumar ad88fc17d2 maple_tree: use vacant nodes to reduce worst case allocations ... In order to determine the store type for a maple tree operation, a walk of the tree is done through mas_wr_walk(). This function descends the tree until a spanning write is detected or we reach a leaf node. While descending, keep track of the height at which we encounter a node with available space. This is done by checking if mas->end is less than the number of slots a given node type can fit. Now that the height of the vacant node is tracked, we can use the difference between the height of the tree and the height of the vacant node to know how many levels we will have to propagate creating new nodes. Update mas_prealloc_calc() to consider the vacant height and reduce the number of worst-case allocations. Rebalancing and spanning stores are not supported and fall back to using the full height of the tree for allocations. Update preallocation testing assertions to take into account vacant height. Link: https://lkml.kernel.org/r/20250410191446.2474640-4-sidhartha.kumar@oracle.com Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Wei Yang <richard.weiyang@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2025-05-11 17:48:28 -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	linux_kselftest-kunit-6.14-rc1	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	kunit: slub: add module description	2025-04-11 17:32:39 -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	zlib: add module description	2025-04-11 17:32:38 -07:00
zstd	Update zstd to the latest upstream release v1.5.7. Imported cleanly from the	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	alloc_tag: handle incomplete bulk allocations in vm_module_tags_populate	2025-04-11 17:32:41 -07:00
argv_split.c
ashldi3.c
ashrdi3.c
asn1_decoder.c	ASN.1: add module description	2025-04-11 17:32:37 -07:00
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
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
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
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
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_inflate.c
decompress_unlz4.c	move asm/unaligned.h to linux/unaligned.h	2024-10-02 17:23:23 -04:00
decompress_unlzma.c
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
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
iov_iter.c	iov_iter: convert iov_iter_extract_xarray_pages() to use folios	2025-05-11 17:48:05 -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 CONFIG_LIBCRC32C	2025-04-04 11:31:42 -07:00
Kconfig.debug	lib/prime_numbers: KUnit test should not select PRIME_NUMBERS	2025-04-15 13:50:43 -07:00
Kconfig.kasan	kasan: delete CONFIG_KASAN_MODULE_TEST	2024-11-11 00:26:44 -08:00
Kconfig.kcsan
Kconfig.kfence
Kconfig.kgdb	Documentation: move dev-tools debugging files to process/debugging/	2024-12-17 13:46:53 -07:00
Kconfig.kmsan
Kconfig.ubsan	lib/Kconfig.ubsan: Remove 'default UBSAN' from UBSAN_INTEGER_WRAP	2025-04-15 13:50:17 -07:00
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	Networking changes for 6.15.	2025-03-26 21:48:21 -07:00
maple_tree.c	maple_tree: use vacant nodes to reduce worst case allocations	2025-05-11 17:48:28 -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
polynomial.c
radix-tree.c
radix-tree.h
random32.c	Random number generator updates for Linux 6.13-rc1.	2024-11-19 10:43:44 -08:00
ratelimit.c
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	Mainly individually changelogged singleton patches. The patch series in	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	string: Add load_unaligned_zeropad() code path to sized_strscpy()	2025-04-15 13:50:17 -07:00
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: Fix panic from test_ubsan_out_of_bounds	2025-04-15 13:50:17 -07:00
test_uuid.c
test_vmalloc.c	mm: alloc_pages_bulk: rename API	2025-01-25 20:22:31 -08:00
test_xarray.c	xarray: make xa_alloc_cyclic() return 0 on all success cases	2025-05-11 17:48:19 -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	ucs2_string: add module description	2025-04-11 17:32:38 -07:00
union_find.c
usercopy.c
uuid.c
vsprintf.c	more printk changes for 6.15	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