linux-kernel - Re: [PATCH v1] perf arm: Workaround ARM PMUs cpu maps having offline cpus

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Date: Mon, 24 Jun 2024 10:50:17 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Suzuki K Poulose <suzuki.poulose@....com>,
	Mike Leach <mike.leach@...aro.org>,
	James Clark <james.clark@....com>,
	John Garry <john.g.garry@...cle.com>,
	Will Deacon <will@...nel.org>,
	Leo Yan <leo.yan@...ux.dev>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Kan Liang <kan.liang@...ux.intel.com>,
	coresight@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Yicong Yang <yangyicong@...wei.com>,
	Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCH v1] perf arm: Workaround ARM PMUs cpu maps having offline cpus

On Thu, 06 Jun 2024 23:53:43 -0700, Ian Rogers wrote:

> When PMUs have a cpu map in the 'cpus' or 'cpumask' file, perf will
> try to open events on those CPUs. ARM doesn't remove offline CPUs
> meaning taking a CPU offline will cause perf commands to fail unless a
> CPU map is passed on the command line.
> 
> More context in:
> https://lore.kernel.org/lkml/20240603092812.46616-1-yangyicong@huawei.com/
> 
> [...]

Applied to perf-tools-next, thanks!

Best regards,
Namhyung