Marco Crivellari dadb3ebcf3 workqueue: WQ_PERCPU added to alloc_workqueue users ... Currently if a user enqueue a work item using schedule_delayed_work() the used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to schedule_work() that is using system_wq and queue_work(), that makes use again of WORK_CPU_UNBOUND. This lack of consistentcy cannot be addressed without refactoring the API. alloc_workqueue() treats all queues as per-CPU by default, while unbound workqueues must opt-in via WQ_UNBOUND. This default is suboptimal: most workloads benefit from unbound queues, allowing the scheduler to place worker threads where they’re needed and reducing noise when CPUs are isolated. This patch adds a new WQ_PERCPU flag to explicitly request the use of the per-CPU behavior. Both flags coexist for one release cycle to allow callers to transition their calls. Once migration is complete, WQ_UNBOUND can be removed and unbound will become the implicit default. With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND), any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND must now use WQ_PERCPU. All existing users have been updated accordingly. Suggested-by: Tejun Heo <tj@kernel.org> Signed-off-by: Marco Crivellari <marco.crivellari@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org>		2025-09-16 10:33:53 -10:00
..
bpf	bpf: Fix memory leak of bpf_scc_info objects	2025-08-02 09:04:57 -07:00
cgroup	cgroup: Changes for v6.17	2025-07-31 16:04:19 -07:00
configs	configs/hardening: Enable CONFIG_INIT_ON_FREE_DEFAULT_ON	2025-07-21 21:41:57 -07:00
debug	TTY/Serial driver updates for 6.15-rc1	2025-04-02 18:17:33 -07:00
dma	dma-contiguous: hornor the cma address limit setup by user	2025-06-12 08:38:40 +02:00
entry	ARM:	2025-07-30 17:14:01 -07:00
events	perf/core: Prevent VMA split of buffer mappings	2025-08-05 21:55:29 +02:00
futex	futex: Use user_write_access_begin/_end() in futex_put_value()	2025-08-11 17:53:21 +02:00
gcov	kbuild: require gcc-8 and binutils-2.30	2025-04-30 21:53:35 +02:00
irq	genirq/test: Resolve irq lock inversion warnings	2025-08-06 10:29:48 +02:00
kcsan	kcsan: test: Initialize dummy variable	2025-07-23 08:51:32 +02:00
livepatch	sched,livepatch: Untangle cond_resched() and live-patching	2025-05-14 13:16:24 +02:00
locking	- Make sure sanity checks down in the mutex lock path happen on the correct	2025-08-17 05:57:47 -07:00
module	Significant patch series in this pull request:	2025-08-05 16:02:07 +03:00
power	drm for 6.17-rc1	2025-07-30 19:26:49 -07:00
printk	printk changes for 6.17	2025-08-04 10:54:36 -07:00
rcu	rcu: Fix racy re-initialization of irq_work causing hangs	2025-08-11 08:43:49 +05:30
sched	sched/psi: Fix psi_seq initialization	2025-08-04 10:51:22 -07:00
time	bitmap-for-6.17	2025-07-31 16:52:32 -07:00
trace	Significant patch series in this pull request:	2025-08-03 16:23:09 -07:00
unwind	unwind: Finish up unwind when a task exits	2025-07-31 10:20:11 -04:00
.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	acct: block access to kernel internal filesystems	2025-02-12 12:24:16 +01:00
async.c
audit.c	audit: record AUDIT_ANOM_* events regardless of presence of rules	2025-04-11 14:14:41 -04:00
audit.h	audit,module: restore audit logging in load failure case	2025-06-16 17:00:06 -04:00
audit_fsnotify.c
audit_tree.c	replace collect_mounts()/drop_collected_mounts() with a safer variant	2025-06-23 14:01:49 -04:00
audit_watch.c	fs: add kern_path_locked_negative()	2025-04-15 11:32:34 +02:00
auditfilter.c
auditsc.c	audit,module: restore audit logging in load failure case	2025-06-16 17:00:06 -04:00
backtracetest.c
bounds.c
capability.c	capability: Remove unused has_capability	2025-03-07 22:03:09 -06:00
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: Make RCU watch ct_kernel_exit_state() warning	2025-03-04 18:44:29 -08:00
cpu.c	cpu: Remove obsolete comment from takedown_cpu()	2025-08-06 22:48:12 +02:00
cpu_pm.c
crash_core.c	kdump: wait for DMA to finish when using CMA	2025-07-19 19:08:23 -07:00
crash_dump_dm_crypt.c	crash_dump: retrieve dm crypt keys in kdump kernel	2025-05-21 10:48:21 -07:00
crash_reserve.c	kdump: implement reserve_crashkernel_cma	2025-07-19 19:08:23 -07:00
cred.c
delayacct.c	delayacct: remove redundant code and adjust indentation	2025-05-27 19:40:33 -07:00
dma.c
elfcorehdr.c
exec_domain.c
exit.c	Significant patch series in this pull request:	2025-08-03 16:23:09 -07:00
exit.h
extable.c
fail_function.c
fork.c	- Prevent a futex hash leak due to different mm lifetimes	2025-08-10 08:11:39 +03:00
freezer.c	sched,freezer: Remove unnecessary warning in __thaw_task	2025-07-17 07:56:50 -10:00
gen_kheaders.sh	kheaders: make it possible to override TAR	2025-08-06 10:23:36 +09:00
groups.c
hung_task.c	hung_task: extend hung task blocker tracking to rwsems	2025-07-19 19:08:26 -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	bpf: Clean up individual BTF_ID code	2025-07-16 18:34:42 -07:00
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
Kconfig.freezer
Kconfig.hz	kernel: Fix "select" wording on HZ_250 description	2025-02-21 09:20:30 +01:00
Kconfig.kexec	crashdump: add CONFIG_KEYS dependency	2025-06-25 15:55:04 -07:00
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: fix typo in comment of kcov_fault_in_area	2025-07-09 22:57:52 -07:00
kexec.c	kexec: enable CMA based contiguous allocation	2025-08-02 12:01:38 -07:00
kexec_core.c	Significant patch series in this pull request:	2025-08-03 16:23:09 -07:00
kexec_elf.c	kexec: initialize ELF lowest address to ULONG_MAX	2025-03-16 22:30:47 -07:00
kexec_file.c	Significant patch series in this pull request:	2025-08-03 16:23:09 -07:00
kexec_handover.c	Summary of significant series in this pull request:	2025-07-31 14:57:54 -07:00
kexec_internal.h	kexec: enable CMA based contiguous allocation	2025-08-02 12:01:38 -07:00
kheaders.c
kprobes.c	kprobes: Add missing kerneldoc for __get_insn_slot	2025-07-15 18:45:34 +09:00
kstack_erase.c	stackleak: Rename stackleak_track_stack to __sanitizer_cov_stack_depth	2025-07-21 21:40:39 -07:00
ksyms_common.c
ksysfs.c
kthread.c	ipvs: Fix estimator kthreads preferred affinity	2025-08-13 08:34:33 +02:00
latencytop.c
Makefile	Kbuild updates for v6.17	2025-08-06 07:32:52 +03:00
module_signature.c
notifier.c
nsproxy.c	kernel/nsproxy: remove unnecessary guards	2025-05-09 13:13:54 +02:00
padata.c	padata: use cpumask_nth()	2025-06-13 17:26:17 +08:00
panic.c	Significant patch series in this pull request:	2025-08-03 16:23:09 -07:00
params.c	module: ensure that kobject_put() is safe for module type kobjects	2025-05-07 20:24:59 +02:00
pid.c	Summary	2025-07-29 21:43:08 -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	ptrace: introduce PTRACE_SET_SYSCALL_INFO request	2025-05-11 17:48:15 -07:00
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	relayfs: support a counter tracking if data is too big to write	2025-07-09 22:57:52 -07:00
resource.c	resource: fix false warning in __request_region()	2025-07-24 17:57:59 -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	signal: Fix memory leak for PIDFD_SELF* sentinels	2025-08-19 13:51:28 +02:00
smp.c	smp: Fix spelling in on_each_cpu_cond_mask()'s doc-comment	2025-08-02 14:24:50 +02:00
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	lockdep: Fix wait context check on softirq for PREEMPT_RT	2025-03-25 10:46:44 +01:00
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	sched/core: Fix migrate_swap() vs. hotplug	2025-07-01 15:02:03 +02:00
sys.c	Summary of significant series in this pull request:	2025-07-31 14:57:54 -07:00
sys_ni.c
sysctl-test.c	sysctl: move u8 register test to lib/test_sysctl.c	2025-04-14 14:13:41 +02:00
sysctl.c	sysctl: rename kern_table -> sysctl_subsys_table	2025-07-23 11:56:02 +02:00
task_work.c
taskstats.c
torture.c
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 atomic_long_try_cmpxchg() in atomic_long_inc_below()	2025-08-02 12:01:38 -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
utsname.c
utsname_sysctl.c
vhost_task.c	vhost: Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(...))	2025-08-01 09:11:08 -04:00
vmcore_info.c	crash: export PAGE_UNACCEPTED_MAPCOUNT_VALUE to vmcoreinfo	2025-05-11 17:54:04 -07:00
watch_queue.c	vfs-6.15-rc1.pipe	2025-03-24 09:52:37 -07:00
watchdog.c	kernel/watchdog: add /sys/kernel/{hard,soft}lockup_count	2025-05-21 10:48:22 -07:00
watchdog_buddy.c	watchdog: fix opencoded cpumask_next_wrap() in watchdog_next_cpu()	2025-07-31 11:28:03 -04:00
watchdog_perf.c	watchdog/perf: Provide function for adjusting the event period	2025-07-04 13:17:30 +01:00
workqueue.c	workqueue: WQ_PERCPU added to alloc_workqueue users	2025-09-16 10:33:53 -10:00
workqueue_internal.h