Hi Finn,
Am 29.03.2024 um 08:54 schrieb Michael Schmitz:
Hi Finn,
Am 28.03.2024 um 15:48 schrieb Finn Thain:
Spinlock recursion in scheduler_tick() doesn't look possible from
reentering scheduler_tick() through code in its call path, so the
mechanism there would be different.
We did rule out the VIA timer interrupt (or MFP timer A interrupt)
getting reentered, right?
I never added an assertion to prove that because I don't have a way to
reproduce the "spinlock recursion" BUG reported by Guenter.
Right. I can reproduce the bug in ARAnyM, so I'll check that the timer
interrupt isn't reentered there. Doesn't quite amount to the same thing
though.
The MFP timer C is not reentered in 66 boots even though I've seen it
appear in the stack trace of 8 recursion warnings.
This was with full preempt - no different from earlier when I got a
similar fraction of warnings at boot.
Cheers,
Michael
