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

From: Peter Zijlstra <[email-masked]>
Date: Thu, 3 Oct 2024 10:47:43 +0200

On Thu, Oct 03, 2024 at 10:40:39AM +0200, Peter Zijlstra wrote:
> 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?

Urgh, for some reason my machine doesn't auto load kvm_intel.ko and then
proceeds to not do anything useful.. Let me try again.