Re: [PATCH v1 1/1] nvme-pci: adaptive interrupt coalescing

[Keith Busch]

On Wed, Jul 15, 2026 at 03:57:03PM +0800, Jun Zeng wrote:
> Add adaptive interrupt coalescing to improve IOPS for high-throughput
> workloads. Monitor IO pressure periodically and enable/disable coalescing
> automatically based on IOPS, queue depth, and inflight IO thresholds.
> This feature is enabled by default, can be controlled through debugfs
> variable during runtime.

Can't you do all this from user space? You'd maybe need the blk-mq
debugfs to get access to the individual hctx dispatch numbers, but maybe
that's okay?

The atomic_long_inc where you placed it is especially harmful to polled
queues.