linux-kernel - Re: [PATCH v6 5/6] tracing: Show inode and device major:minor in deferred user space stacktrace

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Message-ID: <CAHk-=wiELUbwzPCKuA7xbN5SGyZSD12q6W6=eK4NfHDcMY58Zg@mail.gmail.com>
Date: Thu, 28 Aug 2025 13:37:29 -0700
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>, Steven Rostedt <rostedt@...nel.org>, 
	linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	bpf@...r.kernel.org, x86@...nel.org, Masami Hiramatsu <mhiramat@...nel.org>, 
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Josh Poimboeuf <jpoimboe@...nel.org>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...nel.org>, 
	Namhyung Kim <namhyung@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, 
	Andrii Nakryiko <andrii@...nel.org>, Indu Bhagat <indu.bhagat@...cle.com>, 
	"Jose E. Marchesi" <jemarch@....org>, Beau Belgrave <beaub@...ux.microsoft.com>, 
	Jens Remus <jremus@...ux.ibm.com>, Andrew Morton <akpm@...ux-foundation.org>, 
	Florian Weimer <fweimer@...hat.com>, Sam James <sam@...too.org>, Kees Cook <kees@...nel.org>, 
	"Carlos O'Donell" <codonell@...hat.com>
Subject: Re: [PATCH v6 5/6] tracing: Show inode and device major:minor in
 deferred user space stacktrace

On Thu, 28 Aug 2025 at 13:04, Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
>
> > That said, I think they are problematic too, in that I don't think
> > they are universally available, so if you want to trace some
> > executable without build ids - and there are good reasons to do that -
> > you might hate being limited that way.
>
> Right, but these days gdb (and other traditional tools) supports it and
> downloads it (perf should do it with a one-time sticky question too,
> does it already in some cases, unconditionally, that should be fixed as
> well), most distros have it:

So I'm literally thinking one very valid case is debugging some
third-party binary with tracing.

End result: the whole "most distros have it" is just not relevant to
that situation.

          Linus