Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩

How in the world is this possible?! (By write in your GPU code, I assume you mean the write was GPU-initiated?)

Yes. But in times of CUDA uniform memory a GPU write is not limited to GPU memory.

I've managed to simply crash my machine with a buggy GPU kernels many times. Sometimes it just kills my desktop but can still login via ssh.

Theoretically the memory protection scheme used by the OS is replicated on the GPU. But in practice we don't seem to be there yet..

That should be handled by the IOMMU unit, not the GPU though. BTW does your CPU have one? (DMAR in dmesg)?

Hmm.. Should have (AMD FX, aka AMD Bulldozer), but no "DMAR" in dmesg. Maybe there's a BIOS switch that I have to enable? Rebooting..

Sorry I don't know about AMD, need to look it up, I think DMAR might be Intel's name