Maximum NVMe IO command size > 1MB?

[Xuehua Chen]

>I think 2048 is 1MB...
Could you double check?
>From https://www.kernel.org/doc/Documentation/block/queue-sysfs.txt

max_hw_sectors_kb (RO)
----------------------
This is the maximum number of kilobytes supported in a single data transfer.

> I don't think it's coming from any other limitation in the block layer since I'm able to transfer 8M and more in a single request with iser.

Is this transfer done via a single bio? How did you determine the single transfer size?