linux-kernel - Re: [PATCH 00/19] perf: Make perf_pmu

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Message-ID: <20250303091658.GG5880@noisy.programming.kicks-ass.net>
Date: Mon, 3 Mar 2025 10:16:58 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Ravi Bangoria <ravi.bangoria@....com>
Cc: Ingo Molnar <mingo@...nel.org>, lucas.demarchi@...el.com,
	linux-kernel@...r.kernel.org, willy@...radead.org, acme@...nel.org,
	namhyung@...nel.org, mark.rutland@....com,
	alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
	irogers@...gle.com, adrian.hunter@...el.com,
	kan.liang@...ux.intel.com
Subject: Re: [PATCH 00/19] perf: Make perf_pmu_unregister() usable

On Mon, Mar 03, 2025 at 08:55:06AM +0530, Ravi Bangoria wrote:
> Hi Ingo,
> 
> >> Lucas convinced me that perf_pmu_unregister() is a trainwreck; after
> >> considering a few options I was like, how hard could it be..
> >>
> >> So find here a few patches that clean things up in preparation and then a final
> >> patch that makes unregistering a PMU work by introducing a new event state
> >> (REVOKED) and ensuring that any event in such a state will never get to using
> >> it's PMU methods ever again.
> > 
> > So it looks like this series first got lost in the usual end-of-year 
> > fog of holidays, then it has become somewhat bitrotten due to other 
> > perf changes interacting and creating conflicts. I cannot find these 
> > patches in queue.git anymore, other than the somewhat stale 4+ months 
> > old perf/pmu-unregister branch from October 2024.
> 
> Peter posted V2:
> https://lore.kernel.org/r/20250205102120.531585416@infradead.org
> 
> Same was pushed in Peter's queue repo (2025-02-03):
> https://web.git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/log/?h=perf/pmu-unregister

Right, I need to get back to this.. I have a bunch of changes from v2
already accumulated, but haven't gotten around to looking at Ravi's
latest feedback :/