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

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Message-ID: <ada0da4e-4260-47c0-897f-09e3e1e1658e@amd.com>
Date:   Wed, 13 Sep 2023 21:48:43 +0530
From:   Sandipan Das <sandipan.das@....com>
To:     Jirka Hladky <jhladky@...hat.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        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>, 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 Jirka,

Can you please share the following?

1. Family, Model and Stepping of the processor
2. Microcode patch level
On 9/13/2023 8:00 PM, Jirka Hladky wrote:
> 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!
>>
> 
>