Re: [PATCH V5 0/6] blk-mq: improvement CPU hotplug

[Marc Zyngier <maz@xxxxxxxxxx>]

On 2020-02-03 12:56, John Garry wrote:

[...]

> > Can you trigger it after disabling irqbalance?
>
> No, so tested by killing the irqbalance process and it ran for 25
> minutes without issue.

OK, that's interesting.

Can you find you whether irqbalance tries to move an interrupt to an 
offlined CPU?
Just putting a trace into git_set_affinity() should be enough.

Thanks,

          M.
--
Jazz is not dead. It just smells funny...