On 2007.06.25 23:51:51 -0700, Amitabha Roy wrote:
> Hi
>
> >From looking at the default_do_nmi code in traps.c it seems that (at
> least for the non BSP case, with reason=0) the die notifier chain gets
> called with val=DIE_NMI_IPI.
>
> However in the profile_exceptions_notify_handler we check for DIE_NMI
> (and not DIE_NMI_IPI) to decide if we want to cycle through the
> counters. This seems wrong to me unless I am missing something (which
> must be the case, otherwise this code is broken :).
>
> Can anyone help me understand this ?
notify_die(DIE_NMI, ...) is also called from nmi_watchdog_tick. So
depending on "reason" you call:
notify_die(DIE_NMI_IPI, ...)
nmi_watchdog_tick(...)
---> notify_die(DIE_NMI, ...)
or just
notify_die(DIE_NMI, ...)
HTH
Björn
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