Messages in this thread | | | Date | Thu, 29 Jan 2009 15:58:52 -0800 (PST) | Subject | x86's nmi_hz wrt. oprofile's nmi_timer_int.c | From | David Miller <> |
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While working on an NMI watchdog implementation on sparc64 I noticed what seems to be a peculiar behavior of the NMI timer int oprofile support on x86.
When the NMI watchdog tests itself at boot timer we start with nmi_hz equal to HZ.
After the NMI watchdog self-test passes, nmi_hz is reduced down to '1'.
The NMI timer int oprofile support simply uses DIE_NMI notifiers for it's implementation. But I don't see anything in the code of arch/x86/oprofile/nmi_timer_int.c nor the NMI watchdog infrastructure which will re-adjust nmi_hz back to HZ or something similar.
Am I missing something?
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