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From:   Jirka Hladky <jhladky@redhat.com>
Date:   Wed, 13 Sep 2023 16:30:44 +0200
Message-ID: <CAE4VaGBbKC+KgX-drhnc-nHsBo_DfcX4yZWBsNvrULiV3+Li1A@mail.gmail.com>
Subject: Re: [PATCH] perf/x86/amd: Do not WARN on every IRQ
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     "Sandipan Das (AMD)" <sandipandas1990@gmail.com>,
        Breno Leitao <leitao@debian.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Ian Rogers <irogers@google.com>,
        Adrian Hunter <adrian.hunter@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org,
        "H. Peter Anvin" <hpa@zytor.com>,
        Sandipan Das <sandipan.das@amd.com>, leit@fb.com,
        dcostantino@meta.com,
        "open list:PERFORMANCE EVENTS SUBSYSTEM" 
        <linux-perf-users@vger.kernel.org>,
        "open list:PERFORMANCE EVENTS SUBSYSTEM" 
        <linux-kernel@vger.kernel.org>, ananth.narayan@amd.com,
        Ravi Bangoria <ravi.bangoria@amd.com>,
        Michael Petlan <mpetlan@redhat.com>
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Hi Sandipan,

Is there any update on this issue? We have hit the issue, and it makes
the server pretty unusable due to the thousands of Call Traces being
logged.

Thanks a lot!
Jirka


On Fri, Jun 16, 2023 at 5:34=E2=80=AFPM Peter Zijlstra <peterz@infradead.or=
g> wrote:
>
> On Fri, Jun 16, 2023 at 08:13:22PM +0530, Sandipan Das (AMD) wrote:
> > The reserved bits should never be set. The purpose of the WARN_ON() is =
to catch such anomalies.
> > I am working out the details with Breno and will report back with a res=
olution.
>
> Thanks!
>


--=20
-Jirka