Linux-Watchdog Archive on lore.kernel.org
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* watchdog: how to enable?
@ 2019-11-16  0:35 Muni Sekhar
  2019-11-16  1:04 ` Guenter Roeck
  2019-11-18 14:38 ` Bjorn Helgaas
  0 siblings, 2 replies; 14+ messages in thread
From: Muni Sekhar @ 2019-11-16  0:35 UTC (permalink / raw)
  To: linux-watchdog, linux-pci, wim, linux

[ Please keep me in CC as I'm not subscribed to the list]

Hi All,

My kernel is built with the following options:

$ cat /boot/config-5.0.1 | grep NO_HZ
CONFIG_NO_HZ_COMMON=y
CONFIG_NO_HZ_IDLE=y
# CONFIG_NO_HZ_FULL is not set
CONFIG_NO_HZ=y
CONFIG_RCU_FAST_NO_HZ=y

I booted with watchdog enabled(nmi_watchdog=1) as given below:

BOOT_IMAGE=/boot/vmlinuz-5.0.1
root=UUID=f65454ae-3f1d-4b9e-b4be-74a29becbe1e ro debug
ignore_loglevel console=ttyUSB0,115200 console=tty0 console=tty1
console=ttyS2,115200 memmap=1M!1023M nmi_watchdog=1
crashkernel=384M-:128M

When the system is frozen or the kernel is locked up(I noticed that in
this state kernel is not responding for ALT-SysRq-<command key>) but
watchdog is not triggered. So I want to understand how to enable the
watchdog timer and how to verify the basic watchdog functionality
behavior?

Any pointers on this will be greatly appreciated.

--
Thanks,
Sekhar

^ permalink raw reply	[flat|nested] 14+ messages in thread

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Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-11-16  0:35 watchdog: how to enable? Muni Sekhar
2019-11-16  1:04 ` Guenter Roeck
2019-11-16  3:03   ` Muni Sekhar
2019-11-16 16:01     ` Guenter Roeck
2019-11-16 18:34       ` Muni Sekhar
2019-11-16 21:42         ` Guenter Roeck
2019-11-18  9:52           ` Muni Sekhar
2019-11-18 14:10             ` Guenter Roeck
2019-11-18 15:07               ` Muni Sekhar
2019-11-18 14:38 ` Bjorn Helgaas
2019-11-18 14:41   ` Bjorn Helgaas
2019-11-18 15:09   ` Muni Sekhar
2019-11-22 10:59     ` Guenter Roeck
2019-11-22 12:54       ` Muni Sekhar

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