block: spread MSI(-X) vectors to all possible CPUs

[Max Gurtovoy]

On 6/27/2017 9:24 PM, Jens Axboe wrote:
> On 06/26/2017 04:20 AM, Christoph Hellwig wrote:
>> Hi all,
>>
>> this series contains the left-over block bits to spread the MSI-X
>> vectors over all CPU.  Thomas already rewrote and then merged the
>> irq bits into the tip irq/core branch, and this is the remainder.
>>
>> As there are no dependencies on other block changes adding them
>> to the tip tree might be easiest if Jens could ACK them.
>
> Looks fine to me, you can add my Reviewed-by if you want to funnel
> them through the tip tree.
>

I guess we'll need to do some rebasing with my "blk-mq: map all HWQ also 
in hyperthreaded system" patch.
Jens/Christoph,
how do you prefer doing it ?