Re: s390x stack unwinding with perf?

Heiko Carstens
2023-10-27T10:10:51Z

On Fri, Oct 27, 2023 at 10:00:53AM +0200, Daan De Meyer wrote:
>
> If the kernel gets support for s390x user space unwinding using the backchain,
> we'll propose to enable -mbackchain in the default compilation flags for Fedora
> so that s390x on Fedora will have the same profiling experience as x86-64, arm64
> and ppc64. For now we'll keep the status quo since compiling with the backchain
> doesn't provide any benefit until the kernel unwinder can unwind user
> space stacks
> using it.
>
> Thanks for clarifying the current state of user space stack unwinding on s390x!

We will implement the missing pieces and let you know when things are
supposed to work.