Hey, Den 2026-02-24 kl. 15:15, skrev Sebastian Andrzej Siewior: > On 2026-02-20 09:37:22 [+0100], Maarten Lankhorst wrote: >> We're hitting a bug in CI where MAX_STACK_TRACE_ENTRIES is set too low. >> My guess is the repeated loading/unloading is creating multiples of the >> same entries. As a hack just reset lockdep. This might only be necessary >> for CI + PREEMPT_RT. > > spinlock_t on PREEMPT_RT uses the rtmutex which from lockdep's point of > view counts twice: The "logical" lock and the inner wait lock. That > makes twice as many locks. I hope it is this and not some accounting > error…
Yeah that will probably help explode the amount of entries, thanks for the explanation. I'm running out of entries with default PROVE_LOCKING settings on PREEMPT_RT within a minute of booting. Kind regards, ~Maarten Lankhorst
