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    SubjectRe: [PATCH -v3] perf, x86: try to handle unknown nmis with running perfctrs
    On 24.08.10 12:22:52, Cyrill Gorcunov wrote:
    > Btw, guys, I fail to see how new nmi_watchdog work, we have
    > default_do_nmi
    > if (!(reason & 0xc0)) {
    > if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == == NOTIFY_STOP)
    > return
    > if (nmi_watchdog_tick(regs, reason))
    > return
    >
    > but perf_event_nmi_handler returns NOTIFY_STOP when watchdog is perf event
    > and nmi_watchdog_tick _never_ called, or (most probably) I miss something?

    The watchdog is disabled during profiling (perf and oprofile) by
    calling disable_lapic_nmi_watchdog().

    -Robert

    --
    Advanced Micro Devices, Inc.
    Operating System Research Center



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