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9dcbb5045fe5a00f04c99aede5a10726f8bb937b
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Mykyta Yatsenko 9dcbb5045f bpf: Optimize word-sized keys for resizable hashtable 
Specialize the lookup/update/delete paths for keys whose size matches
sizeof(long) (4 bytes on 32-bit, 8 bytes on 64-bit). A static-const
rhashtable_params lets the compiler inline a custom XOR-fold hashfn and
a single-word equality cmpfn, eliminating the indirect jhash dispatch.
The same hashfn and cmpfn are installed into rhashtable's stored params
at rhashtable_init time, so the rehash worker, slow-path inserts, and
rhashtable_next_key() all agree with the inlined fast paths.

The seq_file BPF iterator uses rhashtable_walk_* and is unaffected.

Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Link: https://lore.kernel.org/r/20260605-rhash-v7-7-5b8e05f8630d@meta.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-06-05 08:00:08 -07:00
..
bpf
bpf: Optimize word-sized keys for resizable hashtable
2026-06-05 08:00:08 -07:00
cgroup
Merge tag 'cgroup-for-7.1-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2026-05-22 16:28:47 -07:00
configs
Remove WARN_ALL_UNSEEDED_RANDOM kernel config option
2026-02-23 11:18:48 -08:00
debug
kgdb: update outdated references to kgdb_wait()
2026-04-21 16:41:54 +01:00
dma
dma-mapping: move dma_map_resource() sanity check into debug code
2026-05-18 09:04:59 +02:00
entry
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2026-04-14 16:48:56 -07:00
events
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 7.1-rc3
2026-05-10 13:24:49 -07:00
futex
futex: Prevent lockup in requeue-PI during signal/ timeout wakeup
2026-04-29 08:56:40 +02:00
gcov
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
irq
genirq/chip: Don't call add_interrupt_randomness() for NMIs
2026-05-11 14:56:04 +02:00
kcsan
kcsan: test: Adjust "expect" allocation type for kmalloc_obj
2026-02-26 09:54:08 -08:00
livepatch
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
liveupdate
Merge tag 'fixes-2026-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux
2026-05-13 08:24:50 -07:00
locking
locking/mutex: Fix ww_mutex wait_list operations
2026-04-23 10:05:49 +02:00
module
module: Simplify warning on positive returns from module_init()
2026-04-04 00:04:48 +00:00
power
Merge branches 'pm-cpuidle', 'pm-opp' and 'pm-sleep'
2026-04-10 12:37:27 +02:00
printk
Merge branch 'rework/prb-fixes' into for-linus
2026-04-20 13:42:01 +02:00
rcu
srcu: Don't queue workqueue handlers to never-online CPUs
2026-05-18 12:27:18 -07:00
sched
Merge tag 'sched_ext-for-7.1-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext
2026-05-22 16:43:33 -07:00
time
timers/migration: Fix another hotplug activation race
2026-05-06 08:21:12 +02:00
trace
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 7.1-rc5
2026-05-25 06:33:30 -07:00
unwind
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
.gitignore
kheaders: rebuild kheaders_data.tar.xz when a file is modified within a minute
2025-06-24 20:30:37 +09:00
acct.c
Merge tag 'vfs-7.1-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2026-04-13 14:20:11 -07:00
async.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
audit_fsnotify.c
audit: widen ino fields to u64
2026-03-06 14:31:26 +01:00
audit_tree.c
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
audit_watch.c
audit: widen ino fields to u64
2026-03-06 14:31:26 +01:00
audit.c
audit: enforce AUDIT_LOCKED for AUDIT_TRIM and AUDIT_MAKE_EQUIV
2026-05-12 16:10:38 -04:00
audit.h
audit: widen ino fields to u64
2026-03-06 14:31:26 +01:00
auditfilter.c
audit: fix coding style issues
2026-03-05 22:16:08 -05:00
auditsc.c
audit: fix incorrect inheritable capability in CAPSET records
2026-05-12 16:05:57 -04:00
backtracetest.c
…
bounds.c
x86/asm: Remove ANNOTATE_DATA_SPECIAL usage
2025-12-03 16:53:19 +01:00
capability.c
…
cfi.c
cfi: Move BPF CFI types and helpers to generic code
2025-07-31 18:23:53 -07:00
compat.c
…
configs.c
…
context_tracking.c
context_tracking: Remove rcu_task_trace_heavyweight_{enter,exit}()
2026-01-01 16:39:46 +08:00
cpu_pm.c
syscore: Pass context data to callbacks
2025-11-14 10:01:52 +01:00
cpu.c
Merge tag 'spdx-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx
2026-02-17 09:46:03 -08:00
crash_core_test.c
crash: add KUnit tests for crash_exclude_mem_range
2025-09-13 17:32:55 -07:00
crash_core.c
kernel/crash: remove inclusion of crypto/sha1.h
2026-03-27 21:19:46 -07:00
crash_dump_dm_crypt.c
crash_dump/dm-crypt: don't print in arch-specific code
2026-04-02 23:36:24 -07:00
crash_reserve.c
kernel/crash: remove inclusion of crypto/sha1.h
2026-03-27 21:19:46 -07:00
cred.c
cred: remove unused set_security_override_from_ctx()
2026-01-06 20:52:57 -05:00
delayacct.c
delayacct: fix uapi timespec64 definition
2026-02-08 00:13:32 -08:00
dma.c
…
elfcorehdr.c
…
exec_domain.c
…
exit.c
ptrace: slightly saner 'get_dumpable()' logic
2026-05-14 08:32:11 -07:00
exit.h
…
extable.c
…
fail_function.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
fork.c
futex: Drop CLONE_THREAD requirement for private default hash alloc
2026-05-01 13:12:34 -07:00
freezer.c
freezer: Clarify that only cgroup1 freezer uses PM freezer
2025-10-30 20:10:27 +01:00
gen_kheaders.sh
kheaders: make it possible to override TAR
2025-08-06 10:23:36 +09:00
groups.c
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
hung_task.c
hung_task: explicitly report I/O wait state in log output
2026-03-27 21:19:40 -07:00
iomem.c
…
irq_work.c
irq_work: Fix use-after-free in irq_work_single() on PREEMPT_RT
2026-05-11 16:28:04 +02:00
jump_label.c
jump_label: use ATOMIC_INIT() for initialization of .enabled
2026-03-16 13:16:48 +01:00
kallsyms_internal.h
kallsyms: Get rid of kallsyms relative base
2026-01-22 15:58:22 -07:00
kallsyms_selftest.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
kallsyms_selftest.h
…
kallsyms.c
Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2026-02-12 12:13:01 -08:00
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.kexec
liveupdate: kho: move to kernel/liveupdate
2025-11-27 14:24:33 -08:00
Kconfig.locks
…
Kconfig.preempt
sched: Further restrict the preemption modes
2026-01-08 12:43:57 +01:00
kcov.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
kexec_core.c
kernel/kexec: remove inclusion of crypto/hash.h
2026-03-27 21:19:46 -07:00
kexec_elf.c
…
kexec_file.c
kexec: derive purgatory entry from symbol
2026-01-31 16:16:07 -08:00
kexec_internal.h
kexec: enable CMA based contiguous allocation
2025-08-02 12:01:38 -07:00
kexec.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
kheaders.c
…
kprobes.c
kprobes: Remove unneeded warnings from __arm_kprobe_ftrace()
2026-03-13 23:15:26 +09:00
kstack_erase.c
sysctl: remove __user qualifier from stack_erasing_sysctl buffer argument
2025-11-27 15:44:53 +01:00
ksyms_common.c
…
ksysfs.c
kernel: ksysfs: initialize kernel_kobj earlier
2026-04-03 19:39:52 +02:00
kthread.c
kthread: consolidate kthread exit paths to prevent use-after-free
2026-02-26 10:45:49 +01:00
latencytop.c
…
Makefile
kcov: Enable context analysis
2026-01-05 16:43:34 +01:00
module_signature.c
module: Give 'enum pkey_id_type' a more specific name
2026-03-24 21:42:37 +00:00
notifier.c
…
nscommon.c
nsfs: tighten permission checks for ns iteration ioctls
2026-02-27 22:00:08 +01:00
nsproxy.c
Merge tag 'vfs-7.1-rc1.mount.v2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2026-04-14 19:59:25 -07:00
nstree.c
nstree: tighten permission checks for listing
2026-02-27 22:00:11 +01:00
padata.c
padata: Put CPU offline callback in ONLINE section to allow failure
2026-03-22 11:17:59 +09:00
panic.c
kernel/panic: mark init_taint_buf as __initdata and panic instead of warning in alloc_taint_buf()
2026-03-27 21:19:33 -07:00
params.c
module: Clean up parse_args() arguments
2026-03-18 21:43:18 +00:00
pid_namespace.c
pid_namespace: allow opening pid_for_children before init was created
2026-03-20 14:44:26 +01:00
pid_sysctl.h
…
pid.c
Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2026-04-16 20:11:56 -07:00
profile.c
…
ptrace.c
ptrace: slightly saner 'get_dumpable()' logic
2026-05-14 08:32:11 -07:00
range.c
…
reboot.c
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
regset.c
…
relay.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
resource_kunit.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
resource.c
PCI: Align head space better
2026-03-27 10:19:08 -05:00
rseq.c
rseq: Reenable performance optimizations conditionally
2026-05-06 17:40:27 +02:00
scftorture.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
scs.c
scs: fix a wrong parameter in __scs_magic
2025-11-12 10:00:13 -08:00
seccomp.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
signal.c
Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2026-04-16 20:11:56 -07:00
smp.c
Merge tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2026-04-17 09:43:12 -07:00
smpboot.c
sched/smp: Use the SMP version of idle_thread_set_boot_cpu()
2025-06-13 08:47:20 +02:00
smpboot.h
…
softirq.c
softirq: Prepare for deferred hrtimer rearming
2026-02-27 16:40:13 +01:00
stacktrace.c
…
static_call_inline.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
static_call.c
…
stop_machine.c
sched/core: Fix migrate_swap() vs. hotplug
2025-07-01 15:02:03 +02:00
sys_ni.c
rseq: Implement sys_rseq_slice_yield()
2026-01-22 11:11:17 +01:00
sys.c
prctl: cfi: change the branch landing pad prctl()s to be more descriptive
2026-04-04 18:40:58 -06:00
sysctl-test.c
…
sysctl.c
sysctl: fix uninitialized variable in proc_do_large_bitmap
2026-03-26 09:32:19 +01:00
task_work.c
task_work: Fix NMI race condition
2025-10-29 10:29:54 +01:00
taskstats.c
taskstats: set version in TGID exit notifications
2026-04-15 02:15:02 -07:00
torture.c
torture: Avoid modulo-zero error in torture_hrtimeout_ns()
2026-03-30 15:48:14 -04:00
tracepoint.c
tracepoint: balance regfunc() on func_add() failure in tracepoint_add_func()
2026-04-14 05:17:02 -04:00
tsacct.c
tsacct: skip all kernel threads
2026-01-26 19:07:13 -08:00
ucount.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
uid16.c
…
uid16.h
…
umh.c
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
up.c
…
user_namespace.c
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
user-return-notifier.c
…
user.c
ns: drop custom reference count initialization for initial namespaces
2025-11-11 10:01:32 +01:00
utsname_sysctl.c
…
utsname.c
Merge tag 'namespace-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2025-09-29 11:20:29 -07:00
vhost_task.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
vmcore_info.c
Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2026-04-16 20:11:56 -07:00
watch_queue.c
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
watchdog_buddy.c
watchdog/hardlockup: improve buddy system detection timeliness
2026-03-27 21:19:47 -07:00
watchdog_perf.c
watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency
2026-02-08 00:13:35 -08:00
watchdog.c
watchdog/hardlockup: improve buddy system detection timeliness
2026-03-27 21:19:47 -07:00
workqueue_internal.h
workqueue: Show in-flight work item duration in stall diagnostics
2026-03-05 07:27:48 -10:00
workqueue.c
workqueue: Fix wq->cpu_pwq leak in alloc_and_link_pwqs() WQ_UNBOUND path
2026-05-08 07:59:44 -10:00