Re: [patch 2/2] cpusets: add interleave_over_allowed option

Paul Jackson
2007-10-29T22:49:15Z

> So the user space asks for 8 nodes because it knows the machine
> has that many from /sys and it only gets 4 if a cpuset says so? That's
> just bad semantics. And is not likely to make the user programs happy.

That's no different than what can happen today -- if a task actually
is in an 8 node cpuset, sets up its mempolicies accordingly, and then
gets shoe horned into a 4 node cpuset.

It's not good or bad; it's just interactions between two mechanisms.

If your app doesn't run well in a small cpuset, don't run it there
(or do run it there, poorly ;).

--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.925.600.0401