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.