Hello,

On Fri, Nov 21, 2025 at 07:26:34AM +0100, Thomas Richter wrote:

On 11/21/25 00:48, Namhyung Kim wrote:

quoted

Add a new callchain record mode option for deferred callchains.  For now
it only works with FP (frame-pointer) mode.

And add the missing feature detection logic to clear the flag on old
kernels.

  $ perf record --call-graph fp,defer -vv true

Does this also works for dwarf format?
    # perf record --call-graph dwarf,defer ....

No, it's not supported.  Maybe we can do similar just to dump stack
content and registers for dwarf before returning to user.

Thanks,
Namhyung