AuxXxilium/linux_dsm_epyc7002
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45f1ff59e2
linux_dsm_epyc7002/drivers
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Rafael J. Wysocki 45f1ff59e2 cpuidle: Return nohz hint from cpuidle_select() 
Add a new pointer argument to cpuidle_select() and to the ->select
cpuidle governor callback to allow a boolean value indicating
whether or not the tick should be stopped before entering the
selected state to be returned from there.

Make the ladder governor ignore that pointer (to preserve its
current behavior) and make the menu governor return 'false" through
it if:
 (1) the idle exit latency is constrained at 0, or
 (2) the selected state is a polling one, or
 (3) the expected idle period duration is within the tick period
     range.

In addition to that, the correction factor computations in the menu
governor need to take the possibility that the tick may not be
stopped into account to avoid artificially small correction factor
values.  To that end, add a mechanism to record tick wakeups, as
suggested by Peter Zijlstra, and use it to modify the menu_update()
behavior when tick wakeup occurs.  Namely, if the CPU is woken up by
the tick and the return value of tick_nohz_get_sleep_length() is not
within the tick boundary, the predicted idle duration is likely too
short, so make menu_update() try to compensate for that by updating
the governor statistics as though the CPU was idle for a long time.

Since the value returned through the new argument pointer of
cpuidle_select() is not used by its caller yet, this change by
itself is not expected to alter the functionality of the code.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
2018-04-06 09:29:34 +02:00
..
accessibility
acpi Power management updates for 4.17-rc1 2018-04-03 10:45:39 -07:00
amba
android ANDROID: binder: synchronize_rcu() when using POLLFREE. 2018-02-16 11:16:38 +01:00
ata arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
atm atm: iphase: fix spelling mistake: "Receiverd" -> "Received" 2018-03-30 10:10:04 -04:00
auxdisplay auxdisplay: img-ascii-lcd: Silence 2 uninitialized warnings 2018-03-13 18:16:38 +01:00
base Power management updates for 4.17-rc1 2018-04-03 10:45:39 -07:00
bcma
block loop: Fix lost writes caused by missing flag 2018-03-09 08:36:36 -07:00
bluetooth Bluetooth: hci_bcm: Set pulsed_host_wake flag in sleep parameters 2018-03-15 19:39:37 +01:00
bus perf: Fix sibling iteration 2018-03-16 20:44:12 +01:00
cdrom
char char: remove blackfin OTP driver 2018-03-26 15:56:35 +02:00
clk clk: bcm2835: Protect sections updating shared registers 2018-03-19 09:27:37 -07:00
clocksource arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
connector
cpufreq Power management updates for 4.17-rc1 2018-04-03 10:45:39 -07:00
cpuidle cpuidle: Return nohz hint from cpuidle_select() 2018-04-06 09:29:34 +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
devfreq
dio
dma dmaengine: stm32-dmamux: fix a potential buffer overflow 2018-03-22 10:51:35 +05:30
dma-buf dma-buf/sw_sync: Fix kerneldoc warnings 2018-02-19 10:50:49 +01:00
edac arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
eisa
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 Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-04-02 17:46:37 -07:00
fmc
fpga
fsi
gpio arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
gpu Merge branch 'sched-wait-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-04-02 16:50:39 -07:00
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 Drivers: hv: vmbus: Fix ring buffer signaling 2018-03-06 09:52:59 -08:00
hwmon Fix bad temperature display on Ryzen/Threadripper 2018-02-15 14:31:28 -08:00
hwspinlock
hwtracing perf/x86/pt, coresight: Clean up address filter structure 2018-03-29 16:07:22 +02:00
i2c arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
ide treewide: simplify Kconfig dependencies for removed archs 2018-03-26 15:55:57 +02:00
idle
iio iio: st_pressure: st_accel: pass correct platform data to init 2018-03-10 16:28:05 +00:00
infiniband Fifth pull request for 4.16-rc 2018-03-29 19:23:24 -10:00
input arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
iommu Merge branch 'x86-dma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-04-02 17:18:45 -07:00
ipack
irqchip arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
isdn treewide: simplify Kconfig dependencies for removed archs 2018-03-26 15:55:57 +02:00
leds vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
lightnvm
macintosh macintosh/via-pmu68k: Initialize PMU driver with setup_arch and arch_initcall 2018-03-19 10:22:59 +01:00
mailbox vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
mcb
md dm: fix dropped return code from dm_get_bdev_for_ioctl 2018-03-29 23:31:32 -04:00
media arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
memory memory: brcmstb: dpfe: support new way of passing data from the DCPU 2018-02-23 10:56:59 -08:00
memstick
message
mfd vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
misc arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
mmc arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
mtd mtd: jedec_probe: Fix crash in jedec_read_mfr() 2018-03-29 19:29:06 +02:00
mux
net jiffies: Introduce USER_TICK_USEC and redefine TICK_USEC 2018-04-06 09:28:50 +02:00
nfc
ntb
nubus
nvdimm libnvdimm, nfit: fix persistence domain reporting 2018-03-21 15:12:07 -07:00
nvme nvme_fc: rework sqsize handling 2018-03-08 10:39:58 -07:00
nvmem
of Linux 4.16-rc7 2018-03-28 14:30:41 +10:00
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
parisc
parport
pci arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
pcmcia Power management updates for 4.17-rc1 2018-04-03 10:45:39 -07:00
perf Linux 4.16-rc6 2018-03-19 20:37:35 +01:00
phy phy: qcom-ufs: add MODULE_LICENSE tag 2018-03-12 15:11:59 +05:30
pinctrl arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
platform Merge branches 'acpi-battery', 'acpi-doc' and 'acpi-pmic' 2018-04-02 10:58:13 +02:00
pnp
power power: add to_power_supply macro to the API 2018-02-21 23:27:13 +01:00
powercap powercap: RAPL: Add support for Cannon Lake 2018-03-19 00:02:24 +01:00
pps vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
ps3
ptp vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
pwm pwm: remove pwm-bfin driver 2018-03-26 15:57:08 +02:00
rapidio vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
ras
regulator Merge remote-tracking branches 'regulator/fix/resume' and 'regulator/fix/stm32-vfrefbuf' into regulator-linus 2018-03-07 14:39:07 +00:00
remoteproc
reset
rpmsg vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
rtc rtc: remove bfin driver 2018-03-26 15:56:31 +02:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-22 14:10:29 -07:00
sbus
scsi SCSI fixes on 20180327 2018-03-27 14:11:46 -10:00
sfi
sh
siox
slimbus
sn
soc soc/fsl/qbman: fix issue in qman_delete_cgr_safe() 2018-03-14 13:16:23 -04:00
soundwire
spi spi: remove blackfin related host drivers 2018-03-26 15:57:05 +02:00
spmi
ssb
staging arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
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
tee
thermal
thunderbolt
tty Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux 2018-04-02 21:22:12 -07:00
uio vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
usb arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
uwb
vfio Revert: "vfio-pci: Mask INTx if a device is not capabable of enabling it" 2018-03-21 22:50:19 -06:00
vhost vhost: validate log when IOTLB is enabled 2018-03-29 16:22:47 -04:00
video arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
virt vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
virtio virtio_ring: fix num_free handling in error case 2018-03-01 18:53:38 +02:00
visorbus
vlynq
vme
w1
watchdog arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
xen x86/dma: Remove dma_alloc_coherent_mask() 2018-03-20 10:01:56 +01:00
zorro zorro: Set up z->dev.dma_mask for the DMA API 2018-03-19 10:26:46 +01:00
Kconfig
Makefile