Re: [PATCH 0/4] mm/mempolicy: introduce package-aware weighted interleave

[Gregory Price]

On Thu, Aug 13, 2026 at 03:23:48PM +0900, Rakie Kim wrote:
> On Wed, 12 Aug 2026 22:37:06 -0400 Gregory Price <gourry@xxxxxxxxxx> wrote:
> 
> The cpuset.mems = 0,2 you describe is the node set of package 0, so
> the tasks in that cgroup use node0 and node2 wherever they run.
> 

I think you are over-complicating the explanation and that's making it
hard for folks to reason about this.

My best understanding here is for multi-socket systems, weighted
interleave as-designed is inherently sub-optimal for scaled workloads
that utilize multi-socket ("package") memory resources (DRAM, CXL...)

I think there is also an assumption that total memory utilization is
less than the total capacity - otherwise some of the assumptions here
break, but that comes with the general weighted interleave story.

I'm getting back from vacation, I will take a closer look this week.

~Gregory