Rafael J. Wysocki 757ab15c3f cpuidle: menu: Retain tick when shallow state is selected ... The case addressed by commit 5ef499cd57 (cpuidle: menu: Handle stopped tick more aggressively) in the stopped tick case is present when the tick has not been stopped yet too. Namely, if only two CPU idle states, shallow state A with target residency significantly below the tick boundary and deep state B with target residency significantly above it, are available and the predicted idle duration is above the tick boundary, but below the target residency of state B, state A will be selected and the CPU may spend indefinite amount of time in it, which is not quite energy-efficient. However, if the tick has not been stopped yet and the governor is about to select a shallow idle state for the CPU even though the idle duration predicted by it is above the tick boundary, it should be fine to wake up the CPU early, so the tick can be retained then and the governor will have a chance to select a deeper state when it runs next time. [Note that when this really happens, it will make the idle duration predictor believe that the CPU might be idle longer than predicted, which will make it more likely to predict longer idle durations going forward, but that will also cause deeper idle states to be selected going forward, on average, which is what's needed here.] Fixes: 87c9fe6ee4 (cpuidle: menu: Avoid selecting shallow states with stopped tick) Reported-by: Leo Yan <leo.yan@linaro.org> Cc: 4.17+ <stable@vger.kernel.org> # 4.17+: 5ef499cd57 (cpuidle: menu: Handle ...) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2018-08-25 13:16:08 +02:00
..
accessibility
acpi	arm64 updates for 4.19	2018-08-14 16:39:13 -07:00
amba
android	android: binder: Rate-limit debug and userspace triggered err msgs	2018-08-08 11:05:47 +02:00
ata	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
atm
auxdisplay	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
base	Driver core patches for 4.19-rc1	2018-08-18 11:44:53 -07:00
bcma
block	The main things are support for cephx v2 authentication protocol and	2018-08-20 18:26:55 -07:00
bluetooth	Bluetooth: mediatek: pass correct size to h4_recv_buf()	2018-08-13 15:59:39 +02:00
bus	VLA leftovers pull summary:	2018-08-17 10:40:09 -07:00
cdrom
char	RTC for 4.19	2018-08-20 16:30:27 -07:00
clk	The new and exciting feature this time around is in the clk core.	2018-08-15 21:41:21 -07:00
clocksource	RISC-V Updates for the 4.19 Merge Window	2018-08-19 09:56:38 -07:00
connector
cpufreq	More power management updates for 4.19-rc1	2018-08-22 07:42:36 -07:00
cpuidle	cpuidle: menu: Retain tick when shallow state is selected	2018-08-25 13:16:08 +02:00
crypto	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
dax	dax: remove VM_MIXEDMAP for fsdax and device dax	2018-08-17 16:20:27 -07:00
dca
devfreq	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
dio
dma	DMAengine updates for v4.19-rc1	2018-08-18 15:55:59 -07:00
dma-buf
edac	EDAC: Add missing MEM_LRDDR4 entry in edac_mem_types[]	2018-08-17 15:13:34 +02:00
eisa
extcon
firewire	firewire: use 64-bit time_t based interfaces	2018-08-17 16:20:27 -07:00
firmware	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
fmc
fpga
fsi	fsi: sbefifo: Bump max command length	2018-08-08 15:44:47 +10:00
gnss
gpio	- New Drivers	2018-08-20 15:38:44 -07:00
gpu	- New Drivers	2018-08-20 15:38:44 -07:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2018-08-20 15:59:01 -07:00
hsi
hv
hwmon	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
hwspinlock
hwtracing
i2c	Merge branch 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2018-08-21 17:40:46 -07:00
ide	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide	2018-08-22 07:40:33 -07:00
idle
iio	Merge branch 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2018-08-21 17:40:46 -07:00
infiniband	Merge branch 'linus/master' into rdma.git for-next	2018-08-16 14:21:29 -06:00
input	Merge branch 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2018-08-21 17:40:46 -07:00
iommu	Driver core patches for 4.19-rc1	2018-08-18 11:44:53 -07:00
ipack
irqchip	arch/h8300 update.	2018-08-22 06:24:26 -07:00
isdn	isdn: Disable IIOCDBGVAR	2018-08-16 12:26:24 -07:00
leds	leds: ns2: Change unsigned to unsigned int	2018-08-06 23:03:12 +02:00
lightnvm
macintosh
mailbox	mailbox: Add support for i.MX messaging unit	2018-08-15 09:53:07 +05:30
mcb
md	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2018-08-18 16:48:07 -07:00
media	Merge branch 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2018-08-21 17:40:46 -07:00
memory	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
memstick
message
mfd	Merge branch 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2018-08-21 17:40:46 -07:00
misc	Merge branch 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2018-08-21 17:40:46 -07:00
mmc	Merge branch 'asoc-4.19' into asoc-next	2018-08-09 14:47:05 +01:00
mtd	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
mux
net	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-08-21 13:47:29 -07:00
nfc
ntb
nubus
nvdimm	Linux 4.18-rc6	2018-08-05 19:32:09 -06:00
nvme	Merge branch 'linus/master' into rdma.git for-next	2018-08-16 14:21:29 -06:00
nvmem
of	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2018-08-15 15:04:25 -07:00
opp
oprofile
parisc
parport	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
pci	More power management updates for 4.19-rc1	2018-08-22 07:42:36 -07:00
pcmcia	pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function	2018-08-18 12:30:42 -07:00
perf	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
phy
pinctrl	- New Drivers	2018-08-20 15:38:44 -07:00
platform	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-08-21 13:47:29 -07:00
pnp
power	power supply and reset changes for the v4.19 series	2018-08-21 18:06:27 -07:00
powercap
pps
ps3
ptp	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
pwm
rapidio
ras
regulator	- New Drivers	2018-08-20 15:38:44 -07:00
remoteproc	remoteproc/davinci: use the reset framework	2018-08-16 17:39:55 -07:00
reset
rpmsg
rtc	RTC for 4.19	2018-08-20 16:30:27 -07:00
s390	TTY/Serial driver patches for 4.19-rc1	2018-08-18 10:50:41 -07:00
sbus
scsi	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
sfi
sh
siox
slimbus
sn
soc	remoteproc updates for v4.19	2018-08-18 16:42:04 -07:00
soundwire
spi	hwspinlock updates for v4.19	2018-08-18 16:45:27 -07:00
spmi
ssb	ssb: Remove SSB_WARN_ON, SSB_BUG_ON and SSB_DEBUG	2018-08-09 18:47:47 +03:00
staging	Staging/IIO patches for 4.19-rc1	2018-08-18 11:00:00 -07:00
target	SCSI misc on 20180815	2018-08-15 22:06:26 -07:00
tc
tee
thermal	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal	2018-08-16 10:21:18 -07:00
thunderbolt
tty	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-08-21 13:47:29 -07:00
uio	Char/Misc fix for 4.19-rc1	2018-08-19 09:30:44 -07:00
usb	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
uwb
vfio	powerpc updates for 4.19	2018-08-17 11:32:50 -07:00
vhost	SCSI misc on 20180815	2018-08-15 22:06:26 -07:00
video	- Core Frameworks	2018-08-20 15:41:37 -07:00
virt
virtio	virtio: Make vp_set_vq_affinity() take a mask.	2018-08-11 12:02:18 -07:00
visorbus
vlynq
vme
w1	power supply and reset changes for the v4.19 series	2018-08-21 18:06:27 -07:00
watchdog	linux-watchdog 4.19-rc1 tag	2018-08-18 16:16:57 -07:00
xen	SCSI misc on 20180815	2018-08-15 22:06:26 -07:00
zorro
Kconfig
Makefile	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00