Re: [LSF/MM/BPF TOPIC] Weighted interleave auto-tuning

[Oscar Salvador]

On Thu, Jan 09, 2025 at 01:50:48PM -0500, Joshua Hahn wrote:
> Hello everyone, I hope everyone has had a great start to 2025!

Hi Joshua,

as discussed in the LSFMM about how you can react to nodes becoming
memory{aware,less}, you can register a hotplug memory notifier, as
memory-tiering currently does.

The current use of the hotplug memory notifier by some consumers (e.g:
memory-tiering, slub, etc) is a bit suboptimal, as they only care about
nodes changing its memory state, yet they get notified for every
{online,offline}_pages operation.

I came up with [1]

I did not publish it yet upstream because I wanted to discuss it a bit
with David, but you can give it a try to see if it works for you.
But till it is upstream, you will have to use the hotplug memory
notifier.

[1] https://github.com/leberus/linux.git numa-node-notifier 

-- 
Oscar Salvador
SUSE Labs