linux-kernel - Re: [PATCH] perf/x86/amd: Do not WARN on every IRQ

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Date:   Wed, 13 Sep 2023 16:30:44 +0200
From:   Jirka Hladky <jhladky@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     "Sandipan Das (AMD)" <sandipandas1990@...il.com>,
        Breno Leitao <leitao@...ian.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>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Sandipan Das <sandipan.das@....com>, leit@...com,
        dcostantino@...a.com,
        "open list:PERFORMANCE EVENTS SUBSYSTEM" 
        <linux-perf-users@...r.kernel.org>,
        "open list:PERFORMANCE EVENTS SUBSYSTEM" 
        <linux-kernel@...r.kernel.org>, ananth.narayan@....com,
        Ravi Bangoria <ravi.bangoria@....com>,
        Michael Petlan <mpetlan@...hat.com>
Subject: Re: [PATCH] perf/x86/amd: Do not WARN on every IRQ

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 PM Peter Zijlstra <peterz@...radead.org> 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 resolution.
>
> Thanks!
>


-- 
-Jirka