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Merge Official Source

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Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>
This commit is contained in:
Tianling Shen
2021-09-16 02:02:50 +08:00
parent a2d8d47ddb c37a9e506c
commit b8d5f7c650
8 changed files with 73 additions and 25 deletions
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20
config/Config-kernel.in
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@@ -437,34 +437,22 @@ config KERNEL_PROVE_LOCKING
select KERNEL_DEBUG_KERNEL
default n
config KERNEL_LOCKUP_DETECTOR
bool "Compile the kernel with detect Hard and Soft Lockups"
config KERNEL_SOFTLOCKUP_DETECTOR
bool "Compile the kernel with detect Soft Lockups"
depends on KERNEL_DEBUG_KERNEL
help
Say Y here to enable the kernel to act as a watchdog to detect
hard and soft lockups.
soft lockups.
Softlockups are bugs that cause the kernel to loop in kernel
mode for more than 20 seconds, without giving other tasks a
chance to run. The current stack trace is displayed upon
detection and the system will stay locked up.
Hardlockups are bugs that cause the CPU to loop in kernel mode
for more than 10 seconds, without letting other interrupts have a
chance to run. The current stack trace is displayed upon detection
and the system will stay locked up.
The overhead should be minimal. A periodic hrtimer runs to
generate interrupts and kick the watchdog task every 4 seconds.
An NMI is generated every 10 seconds or so to check for hardlockups.
The frequency of hrtimer and NMI events and the soft and hard lockup
thresholds can be controlled through the sysctl watchdog_thresh.
config KERNEL_DETECT_HUNG_TASK
bool "Compile the kernel with detect Hung Tasks"
depends on KERNEL_DEBUG_KERNEL
default KERNEL_LOCKUP_DETECTOR
default KERNEL_SOFTLOCKUP_DETECTOR
help
Say Y here to enable the kernel to detect "hung tasks",
which are bugs that cause the task to be stuck in