SA6400,26.4.0 custom内核

[ChenWei-914]

Install ENV:

• DMI: 【需补全:boot界面显示的主板DMI字符串】
• CPU: AMD EPYC 7K62 (48-Core / 96-Thread)
• NIC (pid & vid): 【需补全:lspci -nn 输出的 [vid:pid]】

RR version:

• RR: v26.4.0
• addons: acpid, trivial, monitor, mountloader, powersched, reboottoloader, cpuinfo, hdddb, storagepanel(RACK_12_Bay 1X2), smartctl, nvmevolume
• modules: (default)
• lkms: prod

DSM:

• model: SA6400 (epyc7002), kernel: custom
• version: DSM 7.3.2-86009

Issue:

custom SA6400 内核 NR_CPUS 退回 24,导致 48核/96线程的 EPYC 7K62 只能用 24 核。
The custom SA6400 kernel was built with NR_CPUS=24, so an EPYC 7K62 (48C/96T) only gets 24 cores.

注:更新日志中 25.12.0 曾记录 "修复 custom sa6400 默认内核为 24 核心",24.2.2 曾将 NR_CPUS 改为 128。但 v26.4.0 当前 custom 内核 kernel_max=23,似乎再次回归到 NR_CPUS=24。
Note: changelog 24.2.2 set NR_CPUS=128, and 25.12.0 mentioned a 24-core fix, but v26.4.0 custom kernel now reports kernel_max=23 — appears to have regressed to NR_CPUS=24.

关键现象 / Key findings:

• kernel_max=23, possible=0-23 → 内核编译期 NR_CPUS=24,根本不识别 24 以上的 CPU。
  kernel_max=23, possible=0-23 → kernel built with NR_CPUS=24, CPUs above 24 not recognized at all.
• nproc=24,DSM 显示 24C/24T。
• cmdline 中无 maxcpus / nr_cpus / possible_cpus 限制参数。

logs:

cat /proc/version

cat /proc/cmdline

cat /sys/devices/system/cpu/kernel_max

23

cat /sys/devices/system/cpu/possible

0-23

cat /sys/devices/system/cpu/online

0-23

dmesg | grep -iE "NR_CPUS|setup_percpu|ignored"

[wjz304]

#12945