Bill Davidsen <[email protected]> writes:
> Eric W. Biederman wrote:
>> The per cpu nmi watchdog timer is based on an event counter. idle cpus don't
>> generate events so the NMI watchdog doesn't fire
>> and the test to see if the watchdog is working fails.
>
> Question: given all the concern about reducing clocks and all, do we actually
> need nmi on more than one CPU? Are there cases where a single CPU hangs in idle
> on an SMP system?
I really don't know, but the normal interrupt rate is once per second or slower
if the cpu is idle. I was just working in the vicinity and discovered when
I enabled the nmi watchdog it failed to come on because it didn't handled it's
initialization test properly, and x86_64 had already fixed it.
Eric
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
