在 Raspberry PI 4 上升级到 Ubuntu 21.10 服务器后,systemd-udevd 导致高负载

在 Raspberry PI 4 上升级到 Ubuntu 21.10 服务器后,systemd-udevd 导致高负载

将我的 Raspberry Pi 4 8​​GB 从 Ubuntu 21.04 升级到 21.10 后,由于 systemd-udevd,我的负载很高。我全新安装了 Ubuntu 服务器 21.10,但问题仍然存在。我使用 SSD(无 SD 卡)。启动时看起来不错,但大约一天后,负载超过 25,其中大部分似乎是由于 >15 个 systemd-udevd 进程造成的。我运行了一个小型 MicroK8s 和 MySQL 服务器安装,我认为负载与它们无关。升级前,负载稳定在 4 左右。

以下是命令打印输出的示例top

2253733 mysql     20   0 2792212 436376  32344 S  71.0   5.5 661:02.75 mysqld
2218900 root      20   0    9100    716      0 R  66.8   0.0 920:43.38 apiservice-kick
 780593 root      20   0 3545776 775276 104908 S  63.2   9.7   1076:01 kubelite
 802755 root      20   0  761976  46732  34148 S  13.0   0.6   0:00.40 calico-node
 910416 root      20   0   23240   2948      0 R  12.7   0.0 193:44.68 systemd-udevd
 926403 root      20   0   23240   2948      0 R  10.7   0.0 192:11.89 systemd-udevd
 746105 root      20   0  265968  39976   9208 S  10.1   0.5   2:19.20 flask
 411700 root      20   0   31172  10920      0 R   9.8   0.1 287:25.06 systemd-udevd
1698353 root      20   0   23240   2948      0 R   8.8   0.0 142:39.40 systemd-udevd
    958 root      20   0  145596 126728   3708 R   8.1   1.6  82:53.44 systemd-udevd
1141818 root      20   0   23240   2948      0 R   7.5   0.0 175:48.13 systemd-udevd
 755129 root      20   0   22708   2488      0 R   7.2   0.0 214:38.38 systemd-udevd
2919424 root      20   0   23240   2936      0 R   6.5   0.0  85:49.04 systemd-udevd
1258055 root      20   0   23240   2948      0 R   6.2   0.0 168:29.82 systemd-udevd
1383762 root      20   0   23240   2948      0 R   5.5   0.0 160:01.94 systemd-udevd
 599455 root      20   0   35532  15252      0 R   5.2   0.2 246:01.83 systemd-udevd
 867551 root      20   0   23240   2948      0 R   5.2   0.0 197:39.14 systemd-udevd
2084650 root      20   0   23240   2948      0 R   5.2   0.0 123:10.51 systemd-udevd
1906684 root      20   0   23240   2948      0 R   4.9   0.0 131:04.74 systemd-udevd
 770329 root      20   0   22708   2488      0 R   4.6   0.0 212:20.44 systemd-udevd
 890295 root      20   0   23240   2948      0 R   4.2   0.0 195:47.40 systemd-udevd
 780768 root      20   0 1932764  96716  27984 S   2.3   1.2  99:27.87 containerd

当我跑步时,udevadm monitor我会得到如下重复的序列:

KERNEL[124229.147890] add      /devices/virtual/net/calico_tmp_B (net)
KERNEL[124229.148029] add      /devices/virtual/net/calico_tmp_B/queues/rx-0 (queues)
KERNEL[124229.148101] add      /devices/virtual/net/calico_tmp_B/queues/tx-0 (queues)
KERNEL[124229.148660] add      /devices/virtual/net/calico_tmp_A (net)
KERNEL[124229.148764] add      /devices/virtual/net/calico_tmp_A/queues/rx-0 (queues)
KERNEL[124229.148830] add      /devices/virtual/net/calico_tmp_A/queues/tx-0 (queues)
UDEV  [124229.313680] remove   /devices/virtual/net/calico_tmp_A/queues/rx-0 (queues)
KERNEL[124229.408421] remove   /devices/virtual/net/calico_tmp_A/queues/rx-0 (queues)
KERNEL[124229.408530] remove   /devices/virtual/net/calico_tmp_A/queues/tx-0 (queues)
KERNEL[124229.408614] remove   /devices/virtual/net/calico_tmp_A (net)
KERNEL[124229.515488] remove   /devices/virtual/net/calico_tmp_B/queues/rx-0 (queues)
KERNEL[124229.515593] remove   /devices/virtual/net/calico_tmp_B/queues/tx-0 (queues)
KERNEL[124229.515675] remove   /devices/virtual/net/calico_tmp_B (net)
UDEV  [124229.727966] remove   /devices/virtual/net/calico_tmp_A/queues/tx-0 (queues)
UDEV  [124230.646980] remove   /devices/virtual/net/calico_tmp_A (net)
KERNEL[124238.148409] add      /devices/virtual/net/calico_tmp_B (net)
KERNEL[124238.148522] add      /devices/virtual/net/calico_tmp_B/queues/rx-0 (queues)
KERNEL[124238.148587] add      /devices/virtual/net/calico_tmp_B/queues/tx-0 (queues)
KERNEL[124238.149038] add      /devices/virtual/net/calico_tmp_A (net)
KERNEL[124238.149132] add      /devices/virtual/net/calico_tmp_A/queues/rx-0 (queues)
KERNEL[124238.149196] add      /devices/virtual/net/calico_tmp_A/queues/tx-0 (queues)
KERNEL[124238.257022] remove   /devices/virtual/net/calico_tmp_A/queues/rx-0 (queues)
KERNEL[124238.257124] remove   /devices/virtual/net/calico_tmp_A/queues/tx-0 (queues)
KERNEL[124238.257209] remove   /devices/virtual/net/calico_tmp_A (net)
KERNEL[124238.263626] remove   /devices/virtual/net/calico_tmp_B/queues/rx-0 (queues)
KERNEL[124238.263727] remove   /devices/virtual/net/calico_tmp_B/queues/tx-0 (queues)
KERNEL[124238.263808] remove   /devices/virtual/net/calico_tmp_B (net)
UDEV  [124238.536622] add      /devices/virtual/net/calico_tmp_A (net)
UDEV  [124238.939643] add      /devices/virtual/net/calico_tmp_A/queues/rx-0 (queues)
UDEV  [124239.613507] add      /devices/virtual/net/calico_tmp_A/queues/tx-0 (queues)

如果我重新启动,它可以正常启动,但随后负载会再次增加。

任何帮助都将受到赞赏。

答案1

我找到了解决方案。在 MicroK8s 上故障排除页面它提到应该为 Raspberry Pi 上的 Ubuntu 21.10 安装附加模块。运行后,sudo apt install linux-modules-extra-raspi1.3 上的负载下降,问题消失。

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