Smaller kernel stacks for Linux: memory scarcity revives the debate over RAM use

What happened and what to do

According to the LWN article, the global shortage of memory chips has renewed developers' interest in reducing memory use. During the memory management microconference at the 2026 Linux Plumbers Conference, Will Deacon discussed one specific memory consumer under reassessment: kernel stacks, the memory reserved for the execution stack of the operating system core.

For teams running servers and inference nodes on their own infrastructure, memory per machine remains a limit on density and cost. It is worth measuring actual kernel memory consumption per host and per workload before making any change, and tracking that metric over time with continuous collection and capacity dashboards. It is also useful to record the kernel version and configuration of each fleet, so future changes can be compared safely.

How the consultancy can help

Diagnosis of memory consumption across the Linux fleet, including kernel usage and the density of inference and service workloads. Then design and implementation of a collection and monitoring pipeline with capacity dashboards, operated on the client's infrastructure.

Next step

If your team runs Linux servers or inference clusters and wants to understand where memory is being consumed, send a short description of your environment and your case. We will reply with a scoped proposal for diagnosis and implementation.