The LOCKUP_DETECTOR configuration option split into the
SOFTLOCKUP_DETECTOR and HARDLOCKUP_DETECTOR configuration option some
time ago. The HARDLOCKUP_DETECTOR option is only working on some
architectures, but SOFTLOCKUP_DETECTOR should work everywhere. Replace
KERNEL_LOCKUP_DETECTOR with KERNEL_SOFTLOCKUP_DETECTOR.
LOCKUP_DETECTOR will be selected by SOFTLOCKUP_DETECTOR automatically.
Fixes: b951f53fbae3 ("build: Add additional kernel debug options")
Signed-off-by: Hauke Mehrtens <ha...@hauke-m.de>
---
config/Config-kernel.in | 20 ++++----------------
1 file changed, 4 insertions(+), 16 deletions(-)
diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index f71114b5daa8..d4648a506444 100644
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -436,34 +436,22 @@ 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
--
2.30.2
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