Fedora swiotlb tweak fixes Wi-Fi drops

Local LLM workflows keep exposing low-level system bottlenecks that mainstream Linux setups rarely hit. This is niche infrastructure knowledge, but it is exactly the kind of fix that matters when a single model download can stress drivers harder than most real-world desktop workloads.

• –The post is useful because it ties the failure to a concrete kernel signal: repeated `swiotlb buffer is full` messages in `journalctl -k`
• –The contrast between `aria2c` failing and `hf_transfer` working suggests I/O pattern and concurrency matter as much as raw bandwidth
• –The fix is simple and actionable on Fedora: add `swiotlb=262144` to kernel args with `grubby` and reboot
• –The underlying lesson for AI developers is that moving 90GB-class model files can turn storage, DMA, and Wi-Fi tuning into part of the stack
• –This is better read as a community workaround than a permanent upstream fix for mt7925e or Fedora