Re: [RFC PATCH] mm: net: disable kswapd for high-order network buffer allocation

On Mon, Oct 13, 2025 at 06:16:36PM +0800, Barry Song wrote:

On phones, we have observed significant phone heating when running apps
with high network bandwidth. This is caused by the network stack frequently
waking kswapd for order-3 allocations. As a result, memory reclamation becomes
constantly active, even though plenty of memory is still available for network
allocations which can fall back to order-0.

I think we need to understand what's going on here a whole lot more than
this!

So, we try to do an order-3 allocation.  kswapd runs and ... succeeds in
creating order-3 pages?  Or fails to?

If it fails, that's something we need to sort out.

If it succeeds, now we have several order-3 pages, great.  But where do
they all go that we need to run kswapd again?