Re: [PATCH V2] nvme-pci: assign separate irq vectors for adminq and ioq0

[Keith Busch]

On Thu, Mar 01, 2018 at 11:03:30PM +0800, Ming Lei wrote:
> If all CPUs for the 1st IRQ vector of admin queue are offline, then I
> guess NVMe can't work any more.

Yikes, with respect to admin commands, it appears you're right if your
system allows offlining CPU0.

> So looks it is a good idea to make admin queue's IRQ vector assigned as
> non-managed IRQs.

It'd still be considered managed even if it's a 'pre_vector', though
it would get the default mask with all possible CPUs.