[$] Tier-aware memory-controller limits
At the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit, Joshua Hahn discussed the limitations of the current memory controller for tiered-memory systems. He proposed a new memory-controller knob to improve resource allocation and performance consistency across different memory tiers. The discussion highlighted the need for better management of memory usage and the challenges associated with tiered memory implementation.
- ▪Joshua Hahn presented on improving memory controller functionality for tiered-memory systems.
- ▪The proposed solution includes a new knob, memory_tiered_limits, to enhance tier awareness.
- ▪Hahn emphasized the importance of consistent performance for latency-sensitive workloads and hosting services.
Opening excerpt (first ~120 words) tap to expand
Ready to give LWN a try? With a subscription to LWN, you can stay current with what is happening in the Linux and free-software community and take advantage of subscriber-only site features. We are pleased to offer you a free trial subscription, no credit card required, so that you can see for yourself. Please, join us! By Jonathan CorbetMay 25, 2026 LSFMM+BPF Joshua Hahn began his session in the memory-management track of the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit by saying that the memory controller for control groups is intended to provide resource allocation, accounting, and protection from interference by other tasks. But it was not really designed for tiered-memory systems; he is looking for a way to improve that situation.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at LWN.net (Linux Weekly News).