Subject: Re: [BUG almost bisected] Splat in dequeue_rt_stack() and build error

From: Peter Zijlstra <[email-masked]>
Date: Thu, 3 Oct 2024 10:40:39 +0200

On Wed, Aug 21, 2024 at 02:57:16PM -0700, Paul E. McKenney wrote:

> My reproducer on the two-socket 40-core 80-HW-thread systems is:
> 
> tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 1m --configs "50*TREE03" --trust-make
> 

This gets me a very long stream of:

Results directory: /usr/src/linux-rcu/tools/testing/selftests/rcutorture/res/2024.10.03-09.30.33
tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 1m --configs 50*TREE03 --trust-make
TREE03 -------
QEMU error, output:
cat: /usr/src/linux-rcu/tools/testing/selftests/rcutorture/res/2024.10.03-09.30.33/TREE03/qemu-output: No such file or directory
TREE03.10 -------
QEMU error, output:
cat: /usr/src/linux-rcu/tools/testing/selftests/rcutorture/res/2024.10.03-09.30.33/TREE03.10/qemu-output: No such file or directory
...

Did I not do it right?