On Sat, Feb 03, 2018 at 04:17:32PM -0500, Steven Rostedt wrote:

On Sat, 3 Feb 2018 12:52:08 -0800
Alexei Starovoitov [off-list ref] wrote:

quoted

It's a user space job.

BTW, I asked around at DevConf.cz, and nobody I talked with (besides
Arnaldo), have used eBPF. The "path to hello world" is quite high. This
interface is extremely simple to use, and one doesn't need to install
LLVM or other tools to interface with it.

I used the analogy, that eBPF is like C, and this is like Bash. One is
much easier to get "Hello World!" out than the other.

So personally, this is something I know I would use (note, I have
never used eBPF either). But if I'm the only one to use this
interface then I'll stop here (and not bother with the function graph
return interface). If others think this would be helpful, I would ask
them to speak up now.

I'm not arguing against the patches. I know that there are folks
out there who like to use cat/echo interfaces.
I'm only happy that the whole thing has its own kconfig
that we can keep off in fb kernels to reduce maintenance/support burden.
Just like we do for all sorts of other kernel features.