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Date:   Wed, 31 Aug 2022 09:38:27 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Suren Baghdasaryan <surenb@google.com>
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Subject: Re: [RFC PATCH 00/30] Code tagging framework and applications
Message-ID: <Yw8P8xZ4zqu121xL@hirez.programming.kicks-ass.net>
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On Tue, Aug 30, 2022 at 02:48:49PM -0700, Suren Baghdasaryan wrote:
> ===========================
> 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?