Re: [PATCH 2/9] ftrace: Add register_ftrace_direct_hash function

On Wed, Sep 24, 2025 at 11:07:03AM -0400, Steven Rostedt wrote:

On Wed, 24 Sep 2025 16:37:03 +0200
Jiri Olsa [off-list ref] wrote:

quoted

I have bpf changes using this that I did not post yet, but even with that
there's probably no reason to export this.. will remove

I'm interested in seeing these patches, as the ftrace hashes were
supposed to be opaque from other parts of the kernel.

branch:
  https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/log/?h=bpf/tracing_multi

used in this commit:
  https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?h=bpf/tracing_multi&id=8814108949537edaae84fbeee1cbc28280590b7f

background.. it's poc code for bpf tracing-multi attachment. Most likely we will
go with Menglong change instead [1], but it could use this direct interface in a
same way for speeding up the attachment

jirka


[1] https://lore.kernel.org/bpf/20250528034712.138701-1-dongml2@chinatelecom.cn/ (local)