• March 20

  [$] MM medley: huge page allocation, page promotion, KSM, and BPF

  

  lwn.net

  As the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit (LSFMM+BPF) approaches, the density of memory-management...

  As the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit (LSFMM+BPF) approaches, the density of memory-management patches on the mailing lists has increased. Included among those are patches aimed at improving the reliability and performance of huge-page allocation, implementing page promotion on tiered-memory systems, adding a different approach to deduplicating memory, and replacing the BPF memory allocator. Read on for an overview of each.

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More like this (3)

• April 10

  [$] Management of volatile CXL devices

  

  lwn.net

  Compute Express Link (CXL) memory is not like the ordinary RAM that one might install into...

  Compute Express Link (CXL) memory is not like the ordinary RAM that one might install into a computer; it can come and go at any time and is often not present when the kernel is booting. That complicates the management of this memory. During the memory-management track of the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit, Gregory Price ran a session on the...

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• April 11

  [$] Managing multiple sources of page-hotness data

  

  lwn.net

  Knowing how frequently accessed a page of memory is (its "hotness") is a key input to...

  Knowing how frequently accessed a page of memory is (its "hotness") is a key input to many memory-management heuristics. Jonathan Cameron, in a memory-management track at the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit, pointed out that the number of sources of that kind of data is growing over time. He wanted to explore the questions of what commonality exists between data from...

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• April 9

  [$] Improving hot-page detection and promotion

  

  lwn.net

  Tiered-memory systems feature multiple types of memory with varying performance characteristics; on such systems, good performance...

  Tiered-memory systems feature multiple types of memory with varying performance characteristics; on such systems, good performance depends on keeping the most frequently used data in the fastest memory. Identifying that data and placing it properly is a challenge that has kept developers busy for years. Bharata Rao, presenting remotely during a memory-management-track session at the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit, led...

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