linux-kernel - Re: System crash with perf

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Message-ID: <20190131203927.GY6118@tassilo.jf.intel.com>
Date:   Thu, 31 Jan 2019 12:39:27 -0800
From:   Andi Kleen <ak@...ux.intel.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-perf-users@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        eranian@...gle.com, vincent.weaver@...ne.edu,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Subject: Re: System crash with perf_fuzzer (kernel: 5.0.0-rc3)

> Yeah, a loop stuck looks really scary inside an NMI handler.
> Should I just go ahead to send a patch to remove this warning?
> Or probably turn it into a pr_info()?

Not at this point. Would need to fix the PMU reset first to be
more selective. 

-Andi