On 2026-06-03 15:54 +0200, David Hildenbrand (Arm) wrote: > > However, the exited-leader case is a real limitation for profilers. > > OpenTelemetry eBPF Profiler wants to profile a process where the main thread > > has exited but secondary threads are still running [2]. > > [2] https://github.com/open-telemetry/opentelemetry-ebpf-profiler/pull/376 > > > > Using plain TIDs (flags=0) would work, but it means users cannot use > > PROCESS_VM_PIDFD in this scenario. > > > > What do you think this patch should do? I see two options: > > - Address this limitation in a separate future patch that fixes > > pidfd_get_task() to use PIDTYPE_PID when PIDFD_THREAD is detected in > > f_flags, benefiting all callers (process_vm_readv, process_madvise, > > and any future users). > > Extending it consistently for that scenario seems like the right thing to do? > @Christian?
Yes, but I cannot vouch whether the mm operations deal correctively with subthreads.
