Re: NMI watchdog triggering during load_balance

[Peter Zijlstra]

On Thu, Mar 05, 2015 at 09:05:28PM -0700, David Ahern wrote:
> Since each domain is a superset of the lower one each pass through
> load_balance regularly repeats the processing of the previous domain (e.g.,
> NODE domain repeats the cpus in the CPU domain). Then multiplying that
> across 1024 cpus and it seems like a of duplication.

It is, _but_ each domain has an interval, bigger domains _should_ load
balance at a bigger interval (iow lower frequency), and all this is
lockless data gathering, so reusing stuff from the previous round could
be quite stale indeed.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/