linux-kernelorg-stable/drivers
Marco Crivellari 87c21e2406 ACPI: EC: Add WQ_PERCPU 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 change adds a new WQ_PERCPU flag to explicitly request
alloc_workqueue() to be per-cpu when WQ_UNBOUND has not been specified.

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.

Once migration is complete, WQ_UNBOUND can be removed and unbound will
become the implicit default.

Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
[ rjw: Subject adjustment ]
Link: https://patch.msgid.link/20251030154739.262582-4-marco.crivellari@suse.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2025-11-03 18:45:42 +01:00
..
accel accel/qaic: Synchronize access to DBC request queue head & tail pointer 2025-10-14 08:56:31 -06:00
accessibility
acpi ACPI: EC: Add WQ_PERCPU to alloc_workqueue() users 2025-11-03 18:45:42 +01:00
amba
android binder: remove "invalid inc weak" check 2025-10-22 08:04:15 +02:00
ata ata: libata-core: relax checks in ata_read_log_directory() 2025-10-13 09:12:36 +02:00
atm
auxdisplay
base arch_topology: Fix incorrect error check in topology_parse_cpu_capacity() 2025-10-22 08:06:28 +02:00
bcma
block block-6.18-20251023 2025-10-24 12:48:19 -07:00
bluetooth
bus Char/Misc/IIO/Binder changes for 6.18-rc1 2025-10-04 16:26:32 -07:00
cache
cdrom
cdx Char/Misc/IIO/Binder changes for 6.18-rc1 2025-10-04 16:26:32 -07:00
char tpm_crb: Add idle support for the Arm FF-A start method 2025-10-18 14:33:22 +03:00
clk There's a bunch of patches here across drivers/clk/ to migrate drivers to use 2025-10-07 09:28:37 -07:00
clocksource hyperv-next for v6.18 2025-10-07 08:40:15 -07:00
comedi comedi: fix divide-by-zero in comedi_buf_munge() 2025-10-22 08:03:52 +02:00
connector
counter
cpufreq cpufreq/amd-pstate: Fix a regression leading to EPP 0 after hibernate 2025-10-15 08:21:16 -05:00
cpuidle Revert "cpuidle: menu: Avoid discarding useful information" 2025-10-20 21:27:16 +02:00
crypto This push contains the following changes: 2025-10-08 09:38:31 -07:00
cxl cxl/trace: Subtract to find an hpa_alias0 in cxl_poison events 2025-10-14 14:48:14 -07:00
dax
dca
devfreq PM / devfreq: rockchip-dfi: switch to FIELD_PREP_WM16 macro 2025-10-15 10:39:54 -04:00
dibs
dio
dma dmaengine updates for v6.18 2025-10-06 10:37:06 -07:00
dma-buf
dpll dpll: zl3073x: Handle missing or corrupted flash configuration 2025-10-13 17:24:36 -07:00
edac
eisa
extcon
firewire firewire: init_ohci1394_dma: add missing function parameter documentation 2025-10-25 08:29:56 +09:00
firmware Arm SCMI fixes for v6.18 2025-10-23 22:30:01 +02:00
fpga
fsi
fwctl
gnss
gpio gpio: ljca: Fix duplicated IRQ mapping 2025-10-23 14:30:11 +02:00
gpu UAPI Changes: 2025-10-24 13:39:21 +02:00
greybus
hid hid-for-linus-2025101701 2025-10-18 08:18:18 -10:00
hsi
hte
hv
hwmon hwmon: (sht3x) Fix error handling 2025-10-19 18:56:14 -07:00
hwspinlock
hwtracing Char/Misc/IIO/Binder changes for 6.18-rc1 2025-10-04 16:26:32 -07:00
i2c i2c: usbio: Add ACPI device-id for MTL-CVF devices 2025-10-14 13:54:43 +02:00
i3c
idle
iio
infiniband RDMA v6.18 merge window pull request 2025-10-03 18:35:22 -07:00
input Input updates for v6.18-rc0 2025-10-08 09:44:38 -07:00
interconnect
iommu iommufd 6.18 merge window pull 2025-10-03 18:18:48 -07:00
ipack
irqchip irqchip/sifive-plic: Avoid interrupt ID 0 handling during suspend/resume 2025-10-07 10:23:22 +02:00
isdn
leds
macintosh
mailbox qcom: add Glymur CPUCP mailbox binding 2025-10-08 11:44:21 -07:00
mcb
md dm docs: fix typos 2025-10-03 18:48:02 -07:00
media USB/Thunderbolt changes for 6.18-rc1 2025-10-04 16:07:08 -07:00
memory
memstick
message
mfd
misc Char/Misc driver fixes for 6.18-rc3 2025-10-26 10:33:46 -07:00
mmc rpmb: move rpmb_frame struct and constants to common header 2025-10-13 13:18:03 +02:00
most most: usb: hdm_probe: Fix calling put_device() before device initialization 2025-10-22 08:04:43 +02:00
mtd MTD core: 2025-10-04 15:50:37 -07:00
mux
net net/mlx5: Fix IPsec cleanup over MPV device 2025-10-23 07:14:33 -07:00
nfc
ntb
nubus
nvdimm libnvdimm for 6.18 2025-10-06 11:17:18 -07:00
nvme nvme/tcp: handle tls partially sent records in write_space() 2025-10-16 11:32:04 -07:00
nvmem nvmem: rcar-efuse: add missing MODULE_DEVICE_TABLE 2025-10-22 08:02:38 +02:00
of of/irq: Export of_msi_xlate() for module usage 2025-10-24 07:44:09 -05:00
opp
parisc
parport
pci pci-v6.18-fixes-3 2025-10-24 16:43:08 -07:00
pcmcia
peci
perf arm64 fixes for -rc1 2025-10-07 08:59:25 -07:00
phy phy-for-6.18 2025-10-06 10:34:22 -07:00
pinctrl pci-v6.18-changes 2025-10-06 10:41:03 -07:00
platform platform/x86: alienware-wmi-wmax: Add AWCC support to Dell G15 5530 2025-10-15 11:22:35 +03:00
pmdomain
pnp
power
powercap
pps
ps3
ptp ptp: ocp: Fix typo using index 1 instead of i in SMA initialization loop 2025-10-22 19:18:39 -07:00
pwm
rapidio
ras
regulator
remoteproc remoteproc updates for v6.18 2025-10-04 15:45:17 -07:00
reset
rpmsg
rtc RTC for 6.18 2025-10-11 11:56:47 -07:00
s390 more s390 updates for 6.18 merge window 2025-10-09 10:51:43 -07:00
sbus
scsi Merge branch '6.18/scsi-queue' into 6.18/scsi-fixes 2025-10-13 15:54:13 -04:00
sh
siox
slimbus
soc - switch longson32 platform to DT and use MIPS_GENERIC framework 2025-10-05 10:09:55 -07:00
soundwire soundwire updates for 6.18 2025-10-06 10:32:22 -07:00
spi spi: intel-pci: Add support for Intel Wildcat Lake SPI serial flash 2025-10-20 16:15:31 +01:00
spmi
ssb
staging staging: gpib: Fix device reference leak in fmh_gpib driver 2025-10-13 10:55:03 +02:00
target SCSI misc on 20251011 2025-10-11 11:49:00 -07:00
tc
tee TEE QTEE fixes for v6.18 2025-10-17 15:26:52 +02:00
thermal
thunderbolt
tty serial: 8250_mtk: Enable baud clock and manage in runtime PM 2025-10-22 12:13:54 +02:00
ufs SCSI misc on 20251011 2025-10-11 11:49:00 -07:00
uio hyperv-next for v6.18 2025-10-07 08:40:15 -07:00
usb USB serial device ids for 6.18-rc3 2025-10-24 13:52:58 +02:00
vdpa
vfio vfio: Dump migration features under debugfs 2025-10-06 11:22:48 -06:00
vhost
video fbdev fixes & enhancements for 6.18-rc1: 2025-10-10 09:36:23 -07:00
virt
virtio virtio,vhost: fixes, cleanups 2025-10-04 08:48:16 -07:00
w1
watchdog linux-watchdog 6.18-rc1 tag 2025-10-06 11:00:30 -07:00
xen dma-mapping updates for Linux 6.18: 2025-10-03 17:41:12 -07:00
zorro
Kconfig
Makefile hyperv-next for v6.18 2025-10-07 08:40:15 -07:00