https://doug.sh/tags/kernel/ Recent content in Kernel on doug.sh Hugo -- gohugo.io en-us Mon, 09 Nov 2026 17:00:00 -0500 https://doug.sh/posts/gpu-bars-behind-a-pcie-switch/ Mon, 09 Nov 2026 17:00:00 -0500 https://doug.sh/posts/gpu-bars-behind-a-pcie-switch/ Doug Calobrisi linux pcie gpu rocm amd nvidia kernel llm self-hosted Linux 7.0 sized a PCIe switch's bridge window too small for four 32 GB GPU BARs (can't assign; no space). A kernel module that pads the BARs fixes it.