Thor Lancelot Simon writes: > On Fri, Apr 18, 2025 at 11:38:35AM +0200, Edgar Fu? wrote: > > I guess you may need to convert the driver to use MSI. > > Does nVME even support non-MSI interrupts? Given its overall design that > would be surprising to me.
yes, it works, but it is limiting in this case. eg, you need MSI or MSI-X to get per-cpu vectors. nvme_pci.c has these things that we don't really provide as tuneables except by editing the code itself, but look at what these do: int nvme_pci_force_intx = 0; int nvme_pci_mpsafe = 1; int nvme_pci_mq = 1; /* INTx: ioq=1, MSI/MSI-X: ioq=ncpu */ i had to set nvme_pci_force_intx=1 on a 32-cpu system with 4 nvmes to get the 4th one to attach, otherwise we ran out of interrupts. .mrg.
