kswapd0 would use 100% CPU.

[kometchtech]

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                            
   54 root      20   0       0      0      0 R 100.0  0.0  62:34.27 kswapd0                            
22207 kometch   20   0    5024   1244    864 R   0.3  0.1   0:00.30 top                                
    1 root      20   0   22940   2460   1296 S   0.0  0.3   0:14.57 systemd                            
    2 root      20   0       0      0      0 S   0.0  0.0   0:00.00 kthreadd  

By running the following command if it raised for the time being, are not ask for radical?
echo 1 > /proc/sys/vm/drop_caches

[friendlyarm]

これには、コマンド「apt-get update」を実行し、そのようなたくさんのファイルを開くなど、特定のアプリケーションシナリオに関連する必要があります。
通常、我々はそれを気にする必要はありません。

This should be related to specific application scenarios, such as opening a lot of files, execute the command "apt-get update" and so on.
Normally we do not need to care about it.

[kometchtech]

@friendlyarm

Thanks for the replies.

kswapd0 consumes 100% CPU usage was the moment, not followed at all times.
Cubietruck, a similar situation has been reported.

If possible, I want to make your swap partition, but the following errors occurs.

swapon /swapfile
swapon: /swapfile: swapon failed: Function not implemented