linux-kernel - Re: [perf] unchecked MSR access error: WRMSR to 0x3f1

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Message-ID: <5a53490f-d4ec-85f7-4175-e148e02c3e67@maine.edu>
Date: Fri, 20 Jun 2025 12:12:55 -0400 (EDT)
From: Vince Weaver <vincent.weaver@...ne.edu>
To: "Liang, Kan" <kan.liang@...ux.intel.com>
cc: Vince Weaver <vincent.weaver@...ne.edu>, linux-kernel@...r.kernel.org, 
    linux-perf-users@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>, 
    Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, 
    Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, 
    Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
    Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
    Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [perf] unchecked MSR access error: WRMSR to 0x3f1

On Fri, 20 Jun 2025, Liang, Kan wrote:

> Thanks very much for the reproducer! The issue has been root-caused.
> I've sent a patch to fix it. Please give it a try.
> https://lore.kernel.org/lkml/20250620110406.3782402-1-kan.liang@linux.intel.com/

I've applied the patch and can no longer generat the issue with my tests.

Thanks!

Vince

Tested-by: Vince Weaver <vincent.weaver@...ne.edu>