AcoSail/kernel_optimize_test
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8d5755b3f7
kernel_optimize_test/drivers
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Niklas Cassel 8d5755b3f7 watchdog: softdog: fire watchdog even if softirqs do not get to run 
Checking for timer expiration is done from the softirq TIMER_SOFTIRQ.

Since commit 4cd13c21b2 ("softirq: Let ksoftirqd do its job"),
pending softirqs are no longer always handled immediately, instead,
if there are pending softirqs, and ksoftirqd is in state TASK_RUNNING,
the handling of the softirqs are deferred, and are instead supposed
to be handled by ksoftirqd, when ksoftirqd gets scheduled.

If a user space process with a real-time policy starts to misbehave
by never relinquishing the CPU while ksoftirqd is in state TASK_RUNNING,
what will happen is that all softirqs will get deferred, while ksoftirqd,
which is supposed to handle the deferred softirqs, will never get to run.

To make sure that the watchdog is able to fire even when we do not get
to run softirqs, replace the timers with hrtimers.

Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
..
accessibility
acpi This is a few small fixes to the main IPMI driver, make some 2017-02-28 21:06:30 -08:00
amba
android mm, fs: reduce fault, page_mkwrite, and pfn_mkwrite to take only vmf 2017-02-24 17:46:54 -08:00
ata scripts/spelling.txt: add "followings" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
atm Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax 2017-02-28 20:29:41 -08:00
auxdisplay
base memory-hotplug: use dev_online for memhp_auto_online 2017-02-24 17:46:56 -08:00
bcma
block Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax 2017-02-28 20:29:41 -08:00
bluetooth
bus ARM: SoC driver updates 2017-02-23 15:57:04 -08:00
cdrom
char This is a few small fixes to the main IPMI driver, make some 2017-02-28 21:06:30 -08:00
clk The usual collection of new drivers, non-critical fixes, and updates 2017-02-25 14:28:06 -08:00
clocksource Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-02-20 10:06:32 -08:00
connector
cpufreq ARM: SoC non-urgent fixes for merge window 2017-02-23 15:28:04 -08:00
cpuidle powerpc updates for 4.11 part 1. 2017-02-22 10:30:38 -08:00
crypto Merge branch 'akpm' (patches from Andrew) 2017-02-27 23:09:29 -08:00
dax mm: replace FAULT_FLAG_SIZE with parameter to huge_fault 2017-02-24 17:46:54 -08:00
dca
devfreq scripts/spelling.txt: add "followings" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
dio
dma TTY/Serial driver patches for 4.11-rc1 2017-02-22 12:17:25 -08:00
dma-buf
edac Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-02-20 12:47:44 -08:00
eisa
extcon scripts/spelling.txt: add "swithc" pattern and fix typo instances 2017-02-27 18:43:46 -08:00
firewire Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax 2017-02-28 20:29:41 -08:00
firmware ARM: SoC driver updates 2017-02-23 15:57:04 -08:00
fmc
fpga
fsi
gpio This is the bulk of GPIO changes for the v4.11 cycle 2017-02-23 08:46:04 -08:00
gpu Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax 2017-02-28 20:29:41 -08:00
hid scripts/spelling.txt: add "comsume(r)" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
hsi mm, fs: reduce fault, page_mkwrite, and pfn_mkwrite to take only vmf 2017-02-24 17:46:54 -08:00
hv
hwmon scripts/spelling.txt: add "followings" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
hwspinlock
hwtracing mm, fs: reduce fault, page_mkwrite, and pfn_mkwrite to take only vmf 2017-02-24 17:46:54 -08:00
i2c Merge branch 'i2c/for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-02-25 14:21:18 -08:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide 2017-02-28 10:13:40 -08:00
idle
iio
infiniband Merge branch 'akpm' (patches from Andrew) 2017-02-27 23:09:29 -08:00
input lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
iommu iommu/amd: Fix crash when accessing AMD-Vi sysfs entries 2017-02-28 15:48:23 +01:00
ipack
irqchip IOMMU Updates for Linux v4.11 2017-02-20 16:42:43 -08:00
isdn scripts/spelling.txt: add "followings" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
leds leds: class: Add new optional brightness_hw_changed attribute 2017-02-24 23:48:50 -08:00
lguest
lightnvm
macintosh driver core patches for 4.11-rc1 2017-02-22 11:44:32 -08:00
mailbox
mcb
md Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-02-24 14:42:19 -08:00
media lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
memory ARM: SoC driver updates 2017-02-23 15:57:04 -08:00
memstick
message SCSI misc on 20170220 2017-02-21 11:51:42 -08:00
mfd staging/iio driver patches for 4.11-rc1 2017-02-22 12:14:01 -08:00
misc lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
mmc scripts/spelling.txt: add "intialization" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
mtd Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
net Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax 2017-02-28 20:29:41 -08:00
nfc scripts/spelling.txt: add "omited" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
ntb
nubus
nvdimm
nvme scripts/spelling.txt: add "embeded" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
nvmem
of DeviceTree updates for 4.11: 2017-02-22 19:23:14 -08:00
oprofile
parisc
parport lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
pci scripts/spelling.txt: add "followings" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
pcmcia
perf
phy pci-v4.11-changes 2017-02-23 11:53:22 -08:00
pinctrl scripts/spelling.txt: add "overrided" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
platform platform-drivers-x86 for v4.11-1 2017-02-25 14:35:37 -08:00
pnp
power scripts/spelling.txt: add "intialization" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
powercap
pps
ps3
ptp 4.11 is going to be a relatively large release for KVM, with a little over 2017-02-22 18:22:53 -08:00
pwm
rapidio rapidio: use get_user_pages_unlocked() 2017-02-27 18:43:45 -08:00
ras
regulator regulator: Updates for v4.11 2017-02-20 17:23:57 -08:00
remoteproc remoteproc: qcom: mdt_loader: Use signed type for offset 2017-02-22 02:07:13 -08:00
reset ARM: SoC driver updates 2017-02-23 15:57:04 -08:00
rpmsg
rtc RTC for 4.11 2017-02-27 19:59:21 -08:00
s390 s390/dasd: fix spelling mistake: "supportet" -> "supported" 2017-02-23 13:01:20 +01:00
sbus
scsi lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
sfi
sh
sn
soc ARM: SoC driver updates 2017-02-23 15:57:04 -08:00
spi ACPI updates for v4.11-rc1 2017-02-20 17:55:15 -08:00
spmi
ssb
staging scripts/spelling.txt: add "followings" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
target Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax 2017-02-28 20:29:41 -08:00
tc
thermal
thunderbolt
tty lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
uio mm, fs: reduce fault, page_mkwrite, and pfn_mkwrite to take only vmf 2017-02-24 17:46:54 -08:00
usb lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
uwb
vfio VFIO updates for v4.11 2017-02-23 11:26:09 -08:00
vhost
video lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
virt
virtio mm balloon: umount balloon_mnt when removing vb device 2017-02-24 17:46:56 -08:00
vlynq
vme
w1
watchdog watchdog: softdog: fire watchdog even if softirqs do not get to run 2017-03-01 06:15:10 -08:00
xen mm, fs: reduce fault, page_mkwrite, and pfn_mkwrite to take only vmf 2017-02-24 17:46:54 -08:00
zorro
Kconfig
Makefile pci-v4.11-changes 2017-02-23 11:53:22 -08:00