linux-kernel - Re: [RFC PATCH 0/4] perf: Correlating user process data to samples

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Message-ID: <20240413084857.147c6f40@rorschach.local.home>
Date: Sat, 13 Apr 2024 08:48:57 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Beau Belgrave <beaub@...ux.microsoft.com>, mingo@...hat.com,
 acme@...nel.org, namhyung@...nel.org, mhiramat@...nel.org,
 mathieu.desnoyers@...icios.com, linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
 mark.rutland@....com, alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
 irogers@...gle.com, adrian.hunter@...el.com, primiano@...gle.com,
 aahringo@...hat.com, dcook@...ux.microsoft.com, Josh Poimboeuf
 <jpoimboe@...hat.com>
Subject: Re: [RFC PATCH 0/4] perf: Correlating user process data to samples

On Sat, 13 Apr 2024 12:53:38 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> On Fri, Apr 12, 2024 at 09:37:24AM -0700, Beau Belgrave wrote:
> 
> > > Anyway, since we typically run stuff from NMI context, accessing user
> > > data is 'interesting'. As such I would really like to make this work
> > > depend on the call-graph rework that pushes all the user access bits
> > > into return-to-user.  
> > 
> > Cool, I assume that's the SFRAME work? Are there pointers to work I
> > could look at and think about what a rebase looks like? Or do you have
> > someone in mind I should work with for this?  
> 
> I've been offline for a little while and still need to catch up with
> things myself.
> 
> Josh was working on that when I dropped off IIRC, I'm not entirely sure
> where things are at currently (and there is no way I can ever hope to
> process the backlog).
> 
> Anybody know where we are with that?

It's still very much on my RADAR, but with layoffs and such, my
priorities have unfortunately changed. I'm hoping to start helping out
in the near future though (in a month or two).

Josh was working on it, but I think he got pulled off onto other
priorities too :-p

-- Steve