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Peter Zijlstra cec199c5e3 futex: Implement FUTEX2_NUMA 
Extend the futex2 interface to be numa aware.

When FUTEX2_NUMA is specified for a futex, the user value is extended
to two words (of the same size). The first is the user value we all
know, the second one will be the node to place this futex on.

  struct futex_numa_32 {
	u32 val;
	u32 node;
  };

When node is set to ~0, WAIT will set it to the current node_id such
that WAKE knows where to find it. If userspace corrupts the node value
between WAIT and WAKE, the futex will not be found and no wakeup will
happen.

When FUTEX2_NUMA is not set, the node is simply an extension of the
hash, such that traditional futexes are still interleaved over the
nodes.

This is done to avoid having to have a separate !numa hash-table.

[bigeasy: ensure to have at least hashsize of 4 in futex_init(), add
pr_info() for size and allocation information. Cast the naddr math to
void*]

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250416162921.513656-17-bigeasy@linutronix.de
 		2025-05-03 12:02:09 +02:00
..
bpf bpf: Add namespace to BPF internal symbols 2025-04-25 09:21:23 -07:00
cgroup cgroup/cpuset-v1: Add missing support for cpuset_v2_mode 2025-04-17 07:32:53 -10:00
configs - The 6 patch series "Enable strict percpu address space checks" from 2025-04-01 09:29:18 -07:00
debug TTY/Serial driver updates for 6.15-rc1 2025-04-02 18:17:33 -07:00
dma dma-coherent: Warn if OF reserved memory is beyond current coherent DMA mask 2025-04-22 17:44:09 +02:00
entry Objtool changes for v6.15: 2025-03-24 21:18:05 -07:00
events perf/core: Change to POLLERR for pinned events with error 2025-04-23 09:39:06 +02:00
futex futex: Implement FUTEX2_NUMA 2025-05-03 12:02:09 +02:00
gcov gcov: clang: use correct function param names 2025-01-24 22:47:27 -08:00
irq genirq/migration: Use irqd_get_parent_data() in irq_force_complete_move() 2025-04-04 17:08:36 +02:00
kcsan treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
livepatch Modules changes for 6.15-rc1 2025-03-30 15:44:36 -07:00
locking - The 7 patch series "powerpc/crash: use generic crashkernel 2025-04-01 10:06:52 -07:00
module ring-buffer updates for v6.15 2025-03-31 13:37:22 -07:00
power This update includes the following changes: 2025-03-29 10:01:55 -07:00
printk printk changes for 6.15 2025-03-27 19:22:24 -07:00
rcu treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
sched Fix sporadic crashes in dequeue_entities() due to ... bad math. 2025-04-26 09:23:20 -07:00
time timekeeping: Add a lockdep override in tick_freeze() 2025-04-09 22:30:39 +02:00
trace tracing: Fix filter string testing 2025-04-17 22:16:56 -04:00
.gitignore
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Kconfig.freezer
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Kconfig.hz kernel: Fix "select" wording on HZ_250 description 2025-02-21 09:20:30 +01:00
Kconfig.kexec crash, powerpc: default to CRASH_DUMP=n on PPC_BOOK3S_32 2024-11-14 22:43:48 -08:00
Kconfig.locks
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Kconfig.preempt sched: No PREEMPT_RT=y for all{yes,mod}config 2024-11-07 15:25:05 +01:00
Makefile tracing: Disable branch profiling in noinstr code 2025-03-22 09:49:26 +01:00
acct.c acct: block access to kernel internal filesystems 2025-02-12 12:24:16 +01:00
async.c
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audit.c audit: Initialize lsmctx to avoid memory allocation error 2025-01-29 20:02:04 -05:00
audit.h audit: change context data from secid to lsm_prop 2024-10-11 14:34:16 -04:00
audit_fsnotify.c
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audit_tree.c
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audit_watch.c fs: add kern_path_locked_negative() 2025-04-15 11:32:34 +02:00
auditfilter.c audit: fix suffixed '/' filename matching 2024-12-05 19:22:38 -05:00
auditsc.c fs: dedup handling of struct filename init and refcounts bumps 2025-03-18 15:34:27 +01:00
backtracetest.c backtracetest: add MODULE_DESCRIPTION() 2024-06-24 22:24:55 -07:00
bounds.c
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capability.c capability: Remove unused has_capability 2025-03-07 22:03:09 -06:00
cfi.c Modules changes for 6.15-rc1 2025-03-30 15:44:36 -07:00
compat.c
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configs.c
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context_tracking.c context_tracking: Make RCU watch ct_kernel_exit_state() warning 2025-03-04 18:44:29 -08:00
cpu.c hyperv-next for 6.15 2025-03-25 14:47:04 -07:00
cpu_pm.c
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crash_core.c crash: Use note name macros 2025-02-10 16:56:58 -08:00
crash_reserve.c crash: remove an unused argument from reserve_crashkernel_generic() 2025-03-16 22:30:47 -07:00
cred.c cred: remove old {override,revert}_creds() helpers 2024-12-02 11:25:09 +01:00
delayacct.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
dma.c
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elfcorehdr.c
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exec_domain.c
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exit.c exit: fix the usage of delay_group_leader->exit_code in do_notify_parent() and pidfs_exit() 2025-03-25 15:56:22 +01:00
exit.h
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extable.c
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fail_function.c
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fork.c futex: Allow automatic allocation of process wide futex hash 2025-05-03 12:02:08 +02:00
freezer.c sched/fair: Fix external p->on_rq users 2024-10-14 09:14:35 +02:00
gen_kheaders.sh Revert "kheaders: Ignore silly-rename files" 2025-03-15 21:22:52 +09:00
groups.c
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hung_task.c hung_task: show the blocker task if the task is hung on mutex 2025-03-21 22:10:04 -07:00
iomem.c mm/memremap: Pass down MEMREMAP_* flags to arch_memremap_wb() 2025-02-21 15:05:38 +01:00
irq_work.c kasan: make kasan_record_aux_stack_noalloc() the default behaviour 2025-01-13 22:40:36 -08:00
jump_label.c jump_label: Use RCU in all users of __module_text_address(). 2025-03-10 11:54:46 +01:00
kallsyms.c kallsyms: Remove KALLSYMS_ABSOLUTE_PERCPU 2025-02-18 10:16:04 +01:00
kallsyms_internal.h kallsyms: get rid of code for absolute kallsyms 2024-07-20 16:33:21 +09:00
kallsyms_selftest.c kallsyms: Use kthread_run_on_cpu() 2025-01-02 22:12:12 +01:00
kallsyms_selftest.h
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kcmp.c kcmp: improve performance adding an unlikely hint to task comparisons 2025-02-21 10:25:33 +01:00
kcov.c kcov: mark in_softirq_really() as __always_inline 2024-12-30 17:59:08 -08:00
kexec.c
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kexec_core.c - The 7 patch series "powerpc/crash: use generic crashkernel 2025-04-01 10:06:52 -07:00
kexec_elf.c kexec: initialize ELF lowest address to ULONG_MAX 2025-03-16 22:30:47 -07:00
kexec_file.c crash: let arch decide usable memory range in reserved area 2025-03-16 22:30:47 -07:00
kexec_internal.h kexec: use atomic_try_cmpxchg_acquire() in kexec_trylock() 2024-09-01 20:43:23 -07:00
kheaders.c kheaders: Simplify attribute through __BIN_ATTR_SIMPLE_RO() 2024-12-24 09:46:49 +01:00
kprobes.c kprobes: Use RCU in all users of __module_text_address(). 2025-03-10 11:54:46 +01:00
ksyms_common.c
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ksysfs.c kernel/ksysfs.c: simplify bin_attribute definition 2025-01-07 16:59:15 +01:00
kthread.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
latencytop.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
module_signature.c
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notifier.c reboot: move reboot_notifier_list to kernel/reboot.c 2024-11-05 17:12:31 -08:00
nsproxy.c fdget(), trivial conversions 2024-11-03 01:28:06 -05:00
padata.c padata: switch padata_find_next() to using cpumask_next_wrap() 2025-02-24 16:37:23 -05:00
panic.c These are objtool fixes and updates by Josh Poimboeuf, centered 2025-04-02 10:30:10 -07:00
params.c params: Annotate struct module_param_attrs with __counted_by() 2025-03-10 11:54:46 +01:00
pid.c kernel-6.15-rc1.tasklist_lock 2025-03-24 13:39:27 -07:00
pid_namespace.c pid: Do not set pid_max in new pid namespaces 2025-03-06 10:18:36 +01:00
pid_sysctl.h treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
profile.c profiling: remove profile=sleep support 2024-08-04 13:36:28 -07:00
ptrace.c
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range.c
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reboot.c - The 7 patch series "powerpc/crash: use generic crashkernel 2025-04-01 10:06:52 -07:00
regset.c
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relay.c relay: use kasprintf() instead of fixed buffer formatting 2025-03-21 22:10:05 -07:00
resource.c resource: replace open coded variant of DEFINE_RES() 2025-03-21 22:10:05 -07:00
resource_kunit.c resource, kunit: fix user-after-free in resource_test_region_intersects() 2024-10-09 12:47:19 -07:00
rseq.c rseq: Fix segfault on registration when rseq_cs is non-zero 2025-03-06 22:26:49 +01:00
scftorture.c scftorture: Handle NULL argument passed to scf_add_to_free_list(). 2024-11-14 16:09:51 -08:00
scs.c
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seccomp.c seccomp: avoid the lock trip seccomp_filter_release in common case 2025-02-24 11:17:10 -08:00
signal.c vfs-6.15-rc1.fixes 2025-04-02 16:05:21 -07:00
smp.c CSD-lock pull request for v6.14 2025-01-28 11:34:03 -08:00
smpboot.c
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smpboot.h
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softirq.c lockdep: Fix wait context check on softirq for PREEMPT_RT 2025-03-25 10:46:44 +01:00
stackleak.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
stacktrace.c
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static_call.c
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static_call_inline.c Modules changes for 6.15-rc1 2025-03-30 15:44:36 -07:00
stop_machine.c stop-machine: Add comment for rcu_momentary_eqs() 2025-03-11 10:15:52 -07:00
sys.c futex: Add basic infrastructure for local task local hash 2025-05-03 12:02:07 +02:00
sys_ni.c Probes updates for v6.11: 2024-07-18 12:19:20 -07:00
sysctl-test.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
sysctl.c s390 updates for 6.15 merge window 2025-03-29 11:59:43 -07:00
task_work.c kasan: make kasan_record_aux_stack_noalloc() the default behaviour 2025-01-13 22:40:36 -08:00
taskstats.c fdget(), more trivial conversions 2024-11-03 01:28:06 -05:00
torture.c torture: Add get_torture_init_jiffies() for test-start time 2025-02-05 07:14:24 -08:00
tracepoint.c tracepoint: Print the function symbol when tracepoint_debug is set 2025-03-21 15:30:10 -04:00
tsacct.c tsacct: replace strncpy() with strscpy() 2024-07-12 16:39:53 -07:00
ucount.c ucount: use rcuref_t for reference counting 2025-03-16 22:30:50 -07:00
uid16.c
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uid16.h
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umh.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
up.c
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user-return-notifier.c
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user.c uidgid: make sure we fit into one cacheline 2024-09-12 12:16:09 +02:00
user_namespace.c uidgid: add map_id_range_up() 2025-02-12 12:12:27 +01:00
usermode_driver.c
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utsname.c
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utsname_sysctl.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
vhost_task.c vhost_task: fix vhost_task_create() documentation 2025-04-18 10:08:11 -04:00
vmcore_info.c mm: support only one page_type per page 2024-09-03 21:15:43 -07:00
watch_queue.c vfs-6.15-rc1.pipe 2025-03-24 09:52:37 -07:00
watchdog.c A treewide hrtimer timer cleanup 2025-03-25 10:54:15 -07:00
watchdog_buddy.c
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watchdog_perf.c - The 7 patch series "powerpc/crash: use generic crashkernel 2025-04-01 10:06:52 -07:00
workqueue.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
workqueue_internal.h
…