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

Peter Zijlstra
2024-10-03T09:27:13Z

On Thu, Oct 03, 2024 at 10:47:43AM +0200, Peter Zijlstra wrote:
> 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.

Works a ton better now, obviously no splat yet :/