Re: NUMA policy issues with ZONE_MOVABLE

KAMEZAWA Hiroyuki
2007-07-25T06:36:24Z

On Tue, 24 Jul 2007 21:20:45 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:

> The outcome of the 2.6.23 merge was surprising. No antifrag but only
> ZONE_MOVABLE. ZONE_MOVABLE is the highest zone.
>
> For the NUMA layer this has some weird consequences if ZONE_MOVABLE is populated
>
> 1. It is the highest zone.
>
> 2. Thus policy_zone == ZONE_MOVABLE
>

I'm sorry that I'm not familiar with mempolicy's history. Can I make questions ?

What was the main purpose of the policy_zone ?

mempolicy can work without policy_zone check ?

Thanks,
-Kame