On Mon, Jun 03, 2024 at 03:07:04PM -0400, Steven Rostedt wrote: > This is a continuation of the function graph multi user code. > I wrote a proof of concept back in 2019 of this code[1] and > Masami started cleaning it up. I started from Masami's work v10 > that can be found here: > > https://lore.kernel.org/linux-trace-kernel/171509088006.162236.7227326999861366050.stgit@devnote2/ > > This is *only* the code that allows multiple users of function > graph tracing. This is not the fprobe work that Masami is working > to add on top of it. As Masami took my proof of concept, there > was still several things I disliked about that code. Instead of > having Masami clean it up even more, I decided to take over on just > my code and change it up a bit. FWIW, this is useful to me as-is for testing stacktracing. Before this series I had some horrid hacks to manipulate the global filters, and after this series I just need to manipulate the filters in fgraph_ops::ops, which is *much* nicer. I've pushed out my WIP to: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/log/?h=stacktrace/tests ... which is all to say, this is useful and I've given this some testing beyond the usual ftrace tests. Mark.
