Prefer the buddy CPU hardlockup detector
configname: CONFIG_HARDLOCKUP_DETECTOR_PREFER_BUDDY
Linux Kernel Configuration
└─>Kernel hacking
└─>Debug Oops, Lockups and Hangs
└─>Prefer the buddy CPU hardlockup detector
In linux kernel since version 6.5 (release Date: 2023-08-27)
Say Y here to prefer the buddy hardlockup detector over the perf one.
With the buddy detector, each CPU uses its softlockup hrtimer
to check that the next CPU is processing hrtimer interrupts by
verifying that a counter is increasing.
This hardlockup detector is useful on systems that don't have
an arch-specific hardlockup detector or if resources needed
for the hardlockup detector are better used for other things.
With the buddy detector, each CPU uses its softlockup hrtimer
to check that the next CPU is processing hrtimer interrupts by
verifying that a counter is increasing.
This hardlockup detector is useful on systems that don't have
an arch-specific hardlockup detector or if resources needed
for the hardlockup detector are better used for other things.