Nigel Douglas

Product Marketing Manager

LinkedIn logo
kubectl proxy’s Filter Gap and Your kubelet /run Attack Surface

October 28, 2026

kubectl proxy’s Filter Gap and Your kubelet /run Attack Surface

Read more
Passing a TPU Through to a Paravirtualized Guest A customer asked us to run Google TPUs inside our zones. The obvious way to hand a guest a piece of PCI hardware is IOMMU-backed passthrough, and Xen has supported that for HVM guests for years. Our zones default to PV, without hardware virtualization extensions or a VT-x or AMD-V dependency. That is a big part of why they boot and fork as fast as they do. Moving these workloads to a different guest model would have meant giving up properties we deliberately built the runtime around, so the interesting problem was making passthrough work without changing the execution model. Xen's PV mode had never had an IOMMU story for a domU. Every DMA a PV guest issues goes out under dom0's address space, because PV was designed before device passthrough to an unprivileged domain was something anyone needed from it. The TPU work ended up being three problems stacked on top of each other. We had to give Xen an IOMMU interface a PV guest could actually

October 27, 2026

Passing a TPU Through to a Paravirtualized Guest

Read more
It's Beginning to Look a Lot Like CVE Season: PHP2Shell and Beyond

October 23, 2026

It's Beginning to Look a Lot Like CVE Season: PHP2Shell and Beyond

Read more

The OpenClaw /pair approve Vulnerability Explained

April 6, 2026

Read it Now

Happy 2nd Birthday, Edera

April 1, 2026

Read it Now

I Looked at the GPU Stack at KubeCon and Now I Can't Sleep

March 30, 2026

Read it Now

The AI Grid Is Coming to Cell Sites. So Are the Attackers

March 26, 2026

Read it Now

Rendering OCI Images the Right Way: Introducing ocirender

March 25, 2026

Read it Now

You Asked, We're Building It: KVM Support Is Coming to Edera

March 24, 2026

Read it Now

What Every Cloud Native Engineer Needs to Know About Kernel Memory

March 21, 2026

Read it Now