On Wed, Aug 31, 2022 at 09:38:27AM +0200, Peter Zijlstra wrote:

On Tue, Aug 30, 2022 at 02:48:49PM -0700, Suren Baghdasaryan wrote:

quoted

===========================
Code tagging framework
===========================
Code tag is a structure identifying a specific location in the source code
which is generated at compile time and can be embedded in an application-
specific structure. Several applications of code tagging are included in
this RFC, such as memory allocation tracking, dynamic fault injection,
latency tracking and improved error code reporting.
Basically, it takes the old trick of "define a special elf section for
objects of a given type so that we can iterate over them at runtime" and
creates a proper library for it.

I might be super dense this morning, but what!? I've skimmed through the
set and I don't think I get it.

What does this provide that ftrace/kprobes don't already allow?

You're kidding, right?