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Rafael J. Wysocki a37b969a61 cpuidle: poll_state: Add time limit to poll_idle() 
If poll_idle() is allowed to spin until need_resched() returns 'true',
it may actually spin for a much longer time than expected by the idle
governor, since set_tsk_need_resched() is not always called by the
timer interrupt handler.  If that happens, the CPU may spend much
more time than anticipated in the "polling" state.

To prevent that from happening, limit the time of the spinning loop
in poll_idle().

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Doug Smythies <dsmythies@telus.net>
2018-03-29 13:06:07 +02:00
..
accessibility
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acpi
Merge branches 'acpi-ec', 'acpi-tables' and 'acpi-doc'
2018-02-15 12:02:42 +01:00
amba
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android
ANDROID: binder: synchronize_rcu() when using POLLFREE.
2018-02-16 11:16:38 +01:00
ata
pci-v4.16-changes
2018-02-06 09:59:40 -08:00
atm
atm: he: use 64-bit arithmetic instead of 32-bit
2018-02-08 15:05:16 -05:00
auxdisplay
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base
ACPI updates for v4.16-rc2
2018-02-15 14:50:32 -08:00
bcma
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2018-01-19 22:59:33 -05:00
block
block: fix a typo
2018-03-01 08:41:27 -07:00
bluetooth
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
bus
bus: ti-sysc: Fix checking of no-reset-on-init quirk
2018-02-15 09:18:55 -08:00
cdrom
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char
tpm: fix potential buffer overruns caused by bit glitches on the bus
2018-02-26 15:43:46 -08:00
clk
MIPS changes for 4.16
2018-02-07 11:22:44 -08:00
clocksource
clocksource/drivers/arc_timer: Update some comments
2018-02-28 13:55:14 +01:00
connector
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cpufreq
Merge branch 'cpufreq-scpi'
2018-03-02 10:44:44 +01:00
cpuidle
cpuidle: poll_state: Add time limit to poll_idle()
2018-03-29 13:06:07 +02:00
crypto
s390:
2018-02-26 09:28:35 -08:00
dax
dax: ->direct_access does not sleep anymore
2018-02-26 12:32:29 -08:00
dca
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devfreq
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dio
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dma
Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
2018-02-02 09:50:51 -08:00
dma-buf
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
edac
EDAC, sb_edac: Fix out of bound writes during DIMM configuration on KNL
2018-02-23 12:05:37 +01:00
eisa
EISA: Delete error message for a failed memory allocation in eisa_probe()
2018-01-23 09:04:10 +01:00
extcon
extcon: int3496: process id-pin first so that we start with the right status
2018-02-14 06:37:33 +09:00
firewire
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
firmware
2nd set of arm64 updates for 4.16:
2018-02-08 10:44:25 -08:00
fmc
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fpga
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fsi
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gpio
gpio: Handle deferred probing in of_find_gpio() properly
2018-02-27 09:48:07 +01:00
gpu
Merge branch 'drm-fixes-4.16' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
2018-03-01 14:03:14 +10:00
hid
usb: ldusb: add PIDs for new CASSY devices supported by this driver
2018-02-15 18:44:03 +01:00
hsi
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
hv
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
hwmon
Fix bad temperature display on Ryzen/Threadripper
2018-02-15 14:31:28 -08:00
hwspinlock
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hwtracing
Char/Misc driver patches for 4.16-rc1
2018-02-01 10:31:17 -08:00
i2c
i2c: octeon: Prevent error message on bus error
2018-03-02 11:11:15 +01:00
ide
genhd: Rename get_disk() to get_disk_and_module()
2018-02-26 09:48:42 -07:00
idle
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iio
First round of IIO fixes for the 4.16 cycle.
2018-02-20 10:03:22 +01:00
infiniband
RDMA/uverbs: Fix kernel panic while using XRC_TGT QP type
2018-02-21 13:52:19 -05:00
input
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
iommu
treewide/trivial: Remove ';;$' typo noise
2018-02-22 10:59:33 +01:00
ipack
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irqchip
irqchip/bcm: Remove hashed address printing
2018-02-16 14:22:16 +00:00
isdn
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
leds
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
lightnvm
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macintosh
powerpc/macio: set a proper dma_coherent_mask
2018-02-13 08:58:53 -08:00
mailbox
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
mcb
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md
for-linus-20180302
2018-03-02 09:35:36 -08:00
media
media: vb2: Makefile: place vb2-trace together with vb2-core
2018-02-26 11:39:04 -05:00
memory
memory: brcmstb: dpfe: support new way of passing data from the DCPU
2018-02-23 10:56:59 -08:00
memstick
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message
scsi: mptfusion: Add bounds check in mptctl_hp_targetinfo()
2018-01-30 21:32:06 -05:00
mfd
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
misc
powerpc fixes for 4.16 #4
2018-02-24 16:05:50 -08:00
mmc
mmc: core: Avoid hanging to claim host for mmc via some nested calls
2018-02-27 15:12:37 +01:00
mtd
mtd: nand: MTD_NAND_MARVELL should depend on HAS_DMA
2018-02-12 10:57:20 +01:00
mux
Char/Misc driver patches for 4.16-rc1
2018-02-01 10:31:17 -08:00
net
xen: fixes for v4.16-rc4
2018-03-02 10:19:57 -08:00
nfc
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ntb
NTB: ntb_perf: fix cast to restricted __le32
2018-01-28 22:17:24 -05:00
nubus
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nvdimm
libnvdimm: re-enable deep flush for pmem devices via fsync()
2018-03-02 19:31:40 -08:00
nvme
Merge branch 'for-jens' of git://git.infradead.org/nvme into for-linus
2018-02-28 12:18:58 -07:00
nvmem
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of
device property: Constify device_get_match_data()
2018-02-12 10:41:11 +01:00
opp
opp: cpu: Replace GFP_ATOMIC with GFP_KERNEL in dev_pm_opp_init_cpufreq_table
2018-02-12 15:07:46 +05:30
oprofile
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parisc
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parport
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pci
pci-v4.16-fixes-2
2018-03-02 17:44:39 -08:00
pcmcia
Merge branch 'pcmcia' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia
2018-02-08 11:48:49 -08:00
perf
arm_pmu: acpi: request IRQs up-front
2018-02-20 11:34:54 +00:00
phy
USB/PHY updates for 4.16-rc1
2018-02-01 09:40:49 -08:00
pinctrl
pinctrl: meson-axg: adjust uart_ao_b pin group naming
2018-02-12 10:47:36 +01:00
platform
platform/x86: wmi: Fix misuse of vsprintf extension %pULL
2018-03-01 10:01:39 -08:00
pnp
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power
power supply and reset changes for the v4.16 series
2018-01-31 12:55:31 -08:00
powercap
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pps
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
ps3
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ptp
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
pwm
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rapidio
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
ras
mm/memory_failure: Remove unused trapno from memory_failure
2018-01-23 12:17:42 -06:00
regulator
regulator: Fix suspend to idle
2018-01-30 12:25:59 +00:00
remoteproc
remoteproc updates for v4.16
2018-02-05 10:07:40 -08:00
reset
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rpmsg
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
rtc
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
s390
virtio: bugfixes
2018-02-15 14:29:27 -08:00
sbus
pci-v4.16-changes
2018-02-06 09:59:40 -08:00
scsi
SCSI fixes on 20180222
2018-02-23 14:09:43 -08:00
sfi
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sh
cpufreq: Add and use cpufreq_for_each_{valid_,}entry_idx()
2018-02-08 10:21:39 +01:00
siox
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slimbus
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sn
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soc
ARM: SoC fixes for 4.16
2018-02-28 16:11:04 -08:00
soundwire
soundwire: Fix a signedness bug
2018-01-22 16:45:26 +01:00
spi
Merge remote-tracking branch 'spi/topic/xilinx' into spi-next
2018-01-26 17:57:34 +00:00
spmi
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ssb
Merge git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers.git
2018-02-01 10:37:39 +02:00
staging
Staging/IIO fixes for 4.16-rc2
2018-02-22 12:05:43 -08:00
target
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
2018-02-09 14:49:46 -08:00
tc
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tee
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thermal
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
2018-02-06 15:04:58 -08:00
thunderbolt
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tty
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
uio
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
usb
USB fixes for 4.16-rc3
2018-02-22 12:13:01 -08:00
uwb
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vfio
vfio: disable filesystem-dax page pinning
2018-03-02 18:00:04 -08:00
vhost
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
video
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-02-14 17:02:15 -08:00
virt
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
virtio
virtio_pci: don't kfree device on register failure
2018-02-01 16:26:45 +02:00
visorbus
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vlynq
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vme
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w1
Documentation updates for 4.16. New stuff includes refcount_t
2018-01-31 19:25:25 -08:00
watchdog
watchdog: sp5100_tco.c: fix potential build failure
2018-02-19 17:44:05 +01:00
xen
xen: fixes for v4.16-rc4
2018-03-02 10:19:57 -08:00
zorro
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Kconfig
Char/Misc driver patches for 4.16-rc1
2018-02-01 10:31:17 -08:00
Makefile
pci-v4.16-changes
2018-02-06 09:59:40 -08:00