Re: [PATCH v3 28/33] fprobe: Rewrite fprobe on function-graph tracer

[Jiri Olsa]

On Mon, Nov 27, 2023 at 10:58:40PM +0900, Masami Hiramatsu (Google) wrote:
> From: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
> 
> Rewrite fprobe implementation on function-graph tracer.
> Major API changes are:
>  -  'nr_maxactive' field is deprecated.
>  -  This depends on CONFIG_DYNAMIC_FTRACE_WITH_ARGS or
>     !CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS, and
>     CONFIG_HAVE_FUNCTION_GRAPH_FREGS. So currently works only
>     on x86_64.
>  -  Currently the entry size is limited in 15 * sizeof(long).
>  -  If there is too many fprobe exit handler set on the same
>     function, it will fail to probe.
> 
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
> ---
>  Changes in v3:
>   - Update for new reserve_data/retrieve_data API.
>   - Fix internal push/pop on fgraph data logic so that it can
>     correctly save/restore the returning fprobes.

hi,
looks like this one conflicts with recent:

  4bbd93455659 kprobes: kretprobe scalability improvement

jirka