[PATCHv3 0/7] nvme: export additional diagnostic counters via sysfs

[Chaitanya Kulkarni]

On 2/20/26 09:48, Nilay Shroff wrote:
> Hi,
>
> The NVMe driver encounters various events and conditions during normal
> operation that are either not tracked today or not exposed to userspace
> via sysfs. Lack of visibility into these events can make it difficult to
> diagnose subtle issues related to controller behavior, multipath
> stability, and I/O reliability.
>
> This patchset adds several diagnostic counters that provide improved
> observability into NVMe behavior. These counters are intended to help
> users understand events such as transient path unavailability,
> controller retries/reconnect/reset, failovers, and I/O failures. They
> can also be consumed by monitoring tools such as nvme-top.
>
> Specifically, this series proposes to export the following counters via
> sysfs:
>    - Command retry count
>    - Multipath failover count
>    - Command error count
>    - I/O requeue count
>    - I/O failure count
>    - Controller reset event counts
>    - Controller reconnect counts
>
> The patchset consists of seven patches:
>    Patch 1: Export command retry count
>    Patch 2: Export multipath failover count
>    Patch 3: Export command error count
>    Patch 4: Export I/O requeue count
>    Patch 5: Export I/O failure count
>    Patch 6: Export controller reset event counts
>    Patch 7: Export controller reconnect event count



Cover letter automatically logs number of patches and respective author,

you can avoid adding this from next time.

For the whole series, looks good.

Reviewed-by: Chaitanya Kulkarni <kch at nvidia.com>

-ck