Request to Include nct6775 and it87 Kernel Modules for Fan Sensor Support in Redpill DSM 7.2

[TKASAKAWA]

Description I am running Synology DSM 7.2-72806 on a custom hardware setup using Redpill Ver.25.5.1. The hardware is an NEC Express5800/T110i-S server with an Intel Xeon E3-1220v6 processor and 16GB RAM. I am attempting to monitor fan speed using Node Exporter and Prometheus, but the node_hwmon_fan_rpm metric is not available. This indicates that the fan sensors are not detected by the Linux hwmon subsystem.

Issue The absence of node_hwmon_fan_rpm is due to the lack of appropriate fan controller drivers (nct6775 or it87) in the Redpill kernel. When attempting to load the nct6775 module, I receive the following error:

sudo modprobe nct6775 modprobe: ERROR: could not insert 'nct6775': No such device This suggests that either:

The nct6775 kernel module is not included in the Redpill kernel. The kernel cannot detect the Super I/O chip (likely Nuvoton NCT6775 or ITE IT87, common in NEC Express5800 servers). Checking the hwmon subsystem confirms that only coretemp (CPU temperature) is detected, with no fan-related sensors:

ls /sys/class/hwmon hwmon0

cat /sys/class/hwmon/hwmon0/name coretemp

cat /sys/class/hwmon/hwmon*/fan*_input Node Exporter output also lacks node_hwmon_fan_rpm:

text

curl http://localhost:9100/metrics | grep 'node_hwmon_fan_rpm' Current Workarounds To avoid modifying the kernel (due to the risk of breaking the system), I am considering alternatives like:

Using DSM’s native command (/usr/syno/sbin/synodisk --fan_speed) to scrape fan speed. Using IPMI (ipmitool sensor) if supported by the hardware. Using the DSM API (SYNO.Core.Hardware.Fan). However, these workarounds require additional scripting and are less seamless than native hwmon integration via Node Exporter.

Request To enable fan speed monitoring via the hwmon subsystem and Node Exporter, I kindly request the Redpill team to include the following kernel modules in the Redpill build for DSM 7.2:

nct6775: For Nuvoton Super I/O chips, commonly used in servers like NEC Express5800. it87: For ITE Super I/O chips, as a fallback for other hardware. Additional Information DSM Version: 7.2-72806 Redpill Version: Ver.25.5.1 Hardware: NEC Express5800/T110i-S (Xeon E3-1220v6, 16GB RAM)

[TKASAKAWA]

Additional Issue: Missing node_systemd_socket_current_connections Metric

In addition to the fan sensor issue, I am unable to retrieve the node_systemd_socket_current_connections metric from Node Exporter. Running curl http://localhost:9100/metrics | grep 'node_systemd_socket_current_connections' returns no output, and Grafana shows "No data" for the query node_systemd_socket_current_connections{instance="$node", job="$job"}.

This suggests that the systemd collector (--collector.systemd) is either disabled or not fully supported in the Redpill kernel/systemd implementation. Checking systemd sockets (systemctl list-sockets) shows limited or no .socket units, possibly due to DSM 7's restricted systemd functionality.

Request:

• Enhance Redpill's systemd support to ensure node_systemd_socket_current_connections and related metrics are available.
• Verify that the systemd collector in Node Exporter can retrieve socket connection data in DSM 7 (Redpill Ver.25.5.1, kernel 4.4.180+).

System Details:

• systemd version: [output of systemd --version]
• Socket units: [output of systemctl list-sockets]

[wjz304]

lsmod | grep -E 'it87|nct6775'

[TKASAKAWA]

root@nec:~# lsmod | grep -E 'it87|nct6775' root@nec:~#

Not built in on [25.5.3] and then

Enable HugePages Support in Redpill (RR) Kernel Configuration

Description: As a user of Redpill with a 16GB RAM configuration, I would like to request the inclusion of HugePages support in the kernel configuration.

Rationale:

• Most Redpill users operate with memory sizes of 8GB or higher.
• HugePages can significantly improve performance in environments using Docker, virtualization, and databases.
• Enabling HugePages by default will provide a performance boost without impacting low-memory users, who are unlikely to be using Redpill.

Suggested Kernel Configurations:

• CONFIG_HUGETLBFS=y
• CONFIG_HUGETLB_PAGE=y

[wjz304]

RR and DSM are two systems, DSM configuration items are not easy to change

[wjz304]

lsmod | grep -E 'it87|nct6775'

dmesg | grep -E 'it87|nct6775'

[TKASAKAWA]

Thank you for your hard work, wjz304! Knowing that you are the developer gives me confidence in the future. I will continue to follow this issue and look forward to the improvements you will bring. Keep up the great work!

dmesg | grep -E 'it87|nct6775'

[ 44.552618] it87: it87 driver version

[wjz304]

Thank you for your hard work, wjz304! Knowing that you are the developer gives me confidence in the future. I will continue to follow this issue and look forward to the improvements you will bring. Keep up the great work!

dmesg | grep -E 'it87|nct6775'

[ 44.552618] it87: it87 driver version

当前 RR 中已经编译了 hwmon-vid it87 nct6683 nct6775 adt7470 adt7475 等驱动，如果硬件兼容 他们应该会被加载的，你检查一下他们为什么没有被加载