On Wed, May 03, 2023 at 02:56:44PM -0400, Kent Overstreet wrote:

On Wed, May 03, 2023 at 08:40:07AM -1000, Tejun Heo wrote:

quoted

quoted

Yeah, easy / default visibility argument does make sense to me.

So, a bit of addition here. If this is the thrust, the debugfs part seems
rather redundant, right? That's trivially obtainable with tracing / bpf and
in a more flexible and performant manner. Also, are we happy with recording
just single depth for persistent tracking?

Not sure what you're envisioning?

I'd consider the debugfs interface pretty integral; it's much more
discoverable for users, and it's hardly any code out of the whole
patchset.

You can do the same thing with a bpftrace one liner tho. That's rather
difficult to beat.

Thanks.

-- 
tejun