Frederic Weisbecker f400565faa perf: Remove too early and redundant CPU hotplug handling ... The CPU hotplug handlers are called twice: at prepare and online stage. Their role is to: 1) Enable/disable a CPU context. This is irrelevant and even buggy at the prepare stage because the CPU is still offline. On early secondary CPU up, creating an event attached to that CPU might silently fail because the CPU context is observed as online but the context installation's IPI failure is ignored. 2) Update the scope cpumasks and re-migrate the events accordingly in the CPU down case. This is irrelevant at the prepare stage. 3) Remove the events attached to the context of the offlining CPU. It even uses an (unnecessary) IPI for it. This is also irrelevant at the prepare stage. Also none of the *_PREPARE and *_STARTING architecture perf related CPU hotplug callbacks rely on CPUHP_PERF_PREPARE. CPUHP_AP_PERF_ONLINE is enough and the right place to perform the work. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20250424161128.29176-4-frederic@kernel.org		2025-05-08 21:50:19 +02:00
..
bpf	bpf: Convert ringbuf map to rqspinlock	2025-04-11 10:28:26 -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-mapping: fix missing clear bdr in check_ram_in_range_map()	2025-03-12 13:41:44 +01:00
entry	Objtool changes for v6.15:	2025-03-24 21:18:05 -07:00
events	perf: Fix irq work dereferencing garbage	2025-05-08 21:50:19 +02:00
futex	futex: Use a hashmask instead of hashsize	2025-02-26 16:07:59 +01:00
gcov	…
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	sched_ext: Fixes for v6.15-rc3	2025-04-21 19:16:29 -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	…
Kconfig.freezer	…
Kconfig.hz	kernel: Fix "select" wording on HZ_250 description	2025-02-21 09:20:30 +01:00
Kconfig.kexec	…
Kconfig.locks	…
Kconfig.preempt	…
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	…
audit.c	…
audit.h	…
audit_fsnotify.c	…
audit_tree.c	…
audit_watch.c	fs: add kern_path_locked_negative()	2025-04-15 11:32:34 +02:00
auditfilter.c	…
auditsc.c	fs: dedup handling of struct filename init and refcounts bumps	2025-03-18 15:34:27 +01:00
backtracetest.c	…
bounds.c	…
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	…
configs.c	…
context_tracking.c	context_tracking: Make RCU watch ct_kernel_exit_state() warning	2025-03-04 18:44:29 -08:00
cpu.c	perf: Remove too early and redundant CPU hotplug handling	2025-05-08 21:50:19 +02:00
cpu_pm.c	…
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	…
delayacct.c	…
dma.c	…
elfcorehdr.c	…
exec_domain.c	…
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	…
extable.c	…
fail_function.c	…
fork.c	- The 7 patch series "powerpc/crash: use generic crashkernel	2025-04-01 10:06:52 -07:00
freezer.c	…
gen_kheaders.sh	Revert "kheaders: Ignore silly-rename files"	2025-03-15 21:22:52 +09:00
groups.c	…
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	…
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_selftest.c	…
kallsyms_selftest.h	…
kcmp.c	kcmp: improve performance adding an unlikely hint to task comparisons	2025-02-21 10:25:33 +01:00
kcov.c	…
kexec.c	…
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	…
kheaders.c	…
kprobes.c	kprobes: Use RCU in all users of __module_text_address().	2025-03-10 11:54:46 +01:00
ksyms_common.c	…
ksysfs.c	…
kthread.c	treewide: Switch/rename to timer_delete[_sync]()	2025-04-05 10:30:12 +02:00
latencytop.c	…
module_signature.c	…
notifier.c	…
nsproxy.c	…
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	…
profile.c	…
ptrace.c	…
range.c	…
reboot.c	- The 7 patch series "powerpc/crash: use generic crashkernel	2025-04-01 10:06:52 -07:00
regset.c	…
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	…
rseq.c	rseq: Fix segfault on registration when rseq_cs is non-zero	2025-03-06 22:26:49 +01:00
scftorture.c	…
scs.c	…
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	…
smpboot.c	…
smpboot.h	…
softirq.c	lockdep: Fix wait context check on softirq for PREEMPT_RT	2025-03-25 10:46:44 +01:00
stackleak.c	…
stacktrace.c	…
static_call.c	…
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	Updates for the core time/timer subsystem:	2025-03-25 10:33:23 -07:00
sys_ni.c	…
sysctl-test.c	…
sysctl.c	s390 updates for 6.15 merge window	2025-03-29 11:59:43 -07:00
task_work.c	…
taskstats.c	…
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	…
ucount.c	ucount: use rcuref_t for reference counting	2025-03-16 22:30:50 -07:00
uid16.c	…
uid16.h	…
umh.c	…
up.c	…
user-return-notifier.c	…
user.c	…
user_namespace.c	uidgid: add map_id_range_up()	2025-02-12 12:12:27 +01:00
usermode_driver.c	…
utsname.c	…
utsname_sysctl.c	…
vhost_task.c	vhost: return task creation error instead of NULL	2025-03-01 02:52:52 -05:00
vmcore_info.c	…
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	…
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	…