Questions about I/O queue number of NVMe device

[Keith Busch]

On Mon, Mar 31, 2025 at 02:28:20AM +0000, Yuan, Xin wrote:
> 
> I have question about I/O queue number in NVMe. Generally, the number
> of I/O queues of NVMe devices is equal to the number of CPU cores and
> is evenly distributed to the cores. But in some devices, I found that
> the I/O queue is limited and less than core number. For example, I
> have a 14 cores platform with Kingston NVMe. But the I/O queue number
> is only 8. Is it the limitation of NVMe driver or hardware? By the
> way, I cannot find the I/O queue number limitation on the hardware
> datasheet. 

It's a hardware limitation coming from your SSD.