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

Christoph Lameter
2007-10-26T21:12:24Z

On Fri, 26 Oct 2007, David Rientjes wrote:

> You would pass NODE_MASK_ALL if your intent was to interleave over
> everything you have access to, yes. Otherwise you can pass whatever you
> want access to and your interleaved nodemask becomes
> mpol_rebind_policy()'s newmask formal (the cpuset's new mems_allowed)
> AND'd with pol->passed_nodemask.

We would need two fields in the policy structure

1. The specified nodemask (generally ignored)

2. The effective nodemask (specified & cpuset_mems_allowed)

If we have these two then its easy to get a bit further by making
the first nodemask a relative nodemask. The calculation of the effective
nodemask changes somewhat but the logic is then applicable to MPOL_BIND as
well.