Re: [PATCH v2 1/2] nvme: Add Arbitration Burst support

[Christoph Hellwig]

On Wed, Jun 24, 2020 at 02:49:57PM +0800, Baolin Wang wrote:
> >From the NVMe spec, "In order to make efficient use of the non-volatile
> memory, it is often advantageous to execute multiple commands from a
> Submission Queue in parallel. For Submission Queues that are using
> weighted round robin with urgent priority class or round robin
> arbitration, host software may configure an Arbitration Burst setting".
> Thus add Arbitration Burst setting support.

What is the value add of doing this in the kernel?  Wouldn't a nvme-cli
subcommand to just set the arbitration burst to the recommended value,
either as a saved or current value be both more useful and also cause
less kernel bloat?