> This time I reinstalled a new Ubuntu 20.04.1 LTS and reinstall the kernel with > CONFIG_AUFS_DEBUG enabled, the kernel src of Ubuntu 20.04.1 LTS is from > https://kernel.ubuntu.com/git/ubuntu/ubuntu-focal.git/log/?h=master-next > After that, the problem is still here.
Now I am trying to reproduce the problem. Let me make sure several things. Unfortunately "Ubuntu 20.04.1 LTS" is not helpful since I am not an Ubuntu user. And your kernel version "5.4.86" and the config filename "5.4.0-42" make me confused. I don't think you are using latest ubuntu-focal.git/master-next which is 7b9af39845d4 2021-02-05 UBUNTU: upstream stable to v5.4.91 e5acf0da257c 2021-02-05 Linux 5.4.91 What is your exact kernel version? I've got ubuntu-focal.git, but where should I start with? The name of your kernel package or git-tag may be helpful. Is it Ubuntu-5.4.0-42.46 or Ubuntu-5.4.0-66.74? > > - /proc/mounts (instead of the output of mount(8)) > /dev/sda5 / ext4 rw,relatime,errors=remount-ro 0 0 ::: > none /home/lzy/Desktop/d aufs rw,relatime,si=10d824a8b6c06ea8 0 0 All your branch-fs (layers), /home/lzy/Desktop/[abc] are on /dev/sda5, right? > > - /sys/module/aufs/* > > root@lzy-Qi:/sys/module/aufs# ls > coresize holders initsize initstate notes parameters refcnt > sections srcversion taint uevent version How about 'parameters'? For example, the output of "more parameters/*" will be helpful. J. R. Okajima