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Date: Mon, 9 Mar 2026 14:40:47 +0100
From: Greg KH <gregkh@linuxfoundation.org>
To: Jiri Slaby <jirislaby@kernel.org>
Cc: Sasha Levin <sashal@kernel.org>, linux-kernel@vger.kernel.org,
	stable@vger.kernel.org, Ian Rogers <irogers@google.com>,
	Leo Yan <leo.yan@arm.com>, Adrian Hunter <adrian.hunter@intel.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Ingo Molnar <mingo@redhat.com>,
	James Clark <james.clark@linaro.org>, Jiri Olsa <jolsa@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: [PATCH 6.19 027/844] perf metricgroup: Don't early exit if no
 CPUID table exists
Message-ID: <2026030924-recount-halved-605d@gregkh>
References: <20260228173244.1509663-1-sashal@kernel.org>
 <20260228173244.1509663-28-sashal@kernel.org>
 <072e2a07-5c6f-47b5-9695-0a3ffe854ac8@kernel.org>
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In-Reply-To: <072e2a07-5c6f-47b5-9695-0a3ffe854ac8@kernel.org>

On Mon, Mar 09, 2026 at 08:40:33AM +0100, Jiri Slaby wrote:
> On 28. 02. 26, 18:19, Sasha Levin wrote:
> > From: Ian Rogers <irogers@google.com>
> > 
> > [ Upstream commit cee275edcdb1acfdc8270f80e96f30750b633220 ]
> 
> This breaks (userspace) perf:
> $ ./perf stat -a -d -p 1 sleep 5
> PID/TID switch overriding SYSTEM
> Error:
> No supported events found.
> 
> Any ideas?

Is it also broken in 7.0-rc3?  Or is this only a 6.19.y issue?

thanks,

greg k-h