Re: [PATCH v2] mm/vmpressure: skip socket pressure for costly order reclaim

[Jakub Kicinski]

On Thu,  2 Apr 2026 16:25:11 -0700 JP Kobryn (Meta) wrote:
> When kswapd reclaims at high order due to fragmentation, vmpressure() can
> report poor reclaim efficiency even though the system has plenty of free
> memory. This is because kswapd scans many pages but finds little to reclaim
> - the pages are actively in use and don't need to be freed. The resulting
> scan:reclaim ratio triggers socket pressure, throttling TCP throughput
> unnecessarily.

Acked-by: Jakub Kicinski <kuba@xxxxxxxxxx>

FWIW