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build: Replace KERNEL_LOCKUP_DETECTOR with KERNEL_SOFTLOCKUP_DETECTOR

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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 <hauke@hauke-m.de>
(cherry picked from commit d27f6e2c5d2a2315cc8fe684d117c80aa9984ca8)
This commit is contained in:
Hauke Mehrtens 2021-09-12 12:56:48 +02:00
parent 0e29e05dee
commit f11cdd3006
1 changed files with 4 additions and 16 deletions
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20
config/Config-kernel.in
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@ -436,34 +436,22 @@ config KERNEL_PROVE_LOCKING
select KERNEL_DEBUG_KERNEL select KERNEL_DEBUG_KERNEL
default n default n
config KERNEL_LOCKUP_DETECTOR config KERNEL_SOFTLOCKUP_DETECTOR
bool "Compile the kernel with detect Hard and Soft Lockups" bool "Compile the kernel with detect Soft Lockups"
depends on KERNEL_DEBUG_KERNEL depends on KERNEL_DEBUG_KERNEL
help help
Say Y here to enable the kernel to act as a watchdog to detect 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 Softlockups are bugs that cause the kernel to loop in kernel
mode for more than 20 seconds, without giving other tasks a mode for more than 20 seconds, without giving other tasks a
chance to run. The current stack trace is displayed upon chance to run. The current stack trace is displayed upon
detection and the system will stay locked up. 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 config KERNEL_DETECT_HUNG_TASK
bool "Compile the kernel with detect Hung Tasks" bool "Compile the kernel with detect Hung Tasks"
depends on KERNEL_DEBUG_KERNEL depends on KERNEL_DEBUG_KERNEL
default KERNEL_LOCKUP_DETECTOR default KERNEL_SOFTLOCKUP_DETECTOR
help help
Say Y here to enable the kernel to detect "hung tasks", Say Y here to enable the kernel to detect "hung tasks",
which are bugs that cause the task to be stuck in which are bugs that cause the task to be stuck in