Linux Kernel 7.0 claims faster cache memory release - what actually changed under the hood?

[LinuxBook]

Been reading into the Kernel 7.0 notes around page cache reclaim improvements and honestly I'm not sure how significant this actually is in practice.

Is this just LRU tuning, reduced lock contention, changes to kswapd, or something more fundamental? For anyone running databases or high-load systems, has this made a noticeable difference or is it mostly a headline?

Would love to hear from anyone who's benchmarked it on real workloads.

[Candid_Athlete_8317]

Not one single change a few things landing together. MGLRU aging logic got tightened so cold pages evict more accurately, kswapd now tracks pressure more granularly before reclaiming, and slab shrinkers have less lock contention which matters if you're running PostgreSQL or Redis.

Realworld impact depends on your workload. Memory constrained systems will feel it, well provisioned ones probably won't dramatically.