Re: [PATCH 0/2] genirq/affinity: try to make sure online CPU is assgined to irq vector

[Christoph Hellwig]

On Tue, Jan 16, 2018 at 12:03:43AM +0800, Ming Lei wrote:
> Hi,
> 
> These two patches fixes IO hang issue reported by Laurence.
> 
> 84676c1f21 ("genirq/affinity: assign vectors to all possible CPUs")
> may cause one irq vector assigned to all offline CPUs, then this vector
> can't handle irq any more.

Well, that very much was the intention of managed interrupts.  Why
does the device raise an interrupt for a queue that has no online
cpu assigned to it?