On 11/19/19 6:39 PM, Philippe Gerum wrote: > On 11/19/19 5:46 PM, Philippe Gerum via Xenomai wrote: >> On 11/18/19 4:13 PM, Lange Norbert via Xenomai wrote: >>> Hello, >>> >>> Here's one of my deadlocks, the output seems interleaved from 2 concurrent >>> dumps, >>> I ran the crashlog through decode_stacktrace.sh. >>> >> >> Ok, I can reproduce this one, including in a vm. The symptom can be either a >> lockup, or recursive faults. I'm on it. >> > > #0b9e81807 seems to have introduced a regression. Something there may be > subtly at odds with the core scheduler logic. More later.
Eh, no. #0b9e81807 only exposed a very serious and longstanding issue into the scheduler core, which may cause a CPU to pick threads from a remote runqueue in rare circumstances. And that bug is definitely mine. I need to review more code to make sure no more horror shows alike are waiting for prime time. This bug affects all Xenomai series, 3.1, 3.0, 2.x. -- Philippe.
