I am not sure if that is an error of sys-apps/util-linux or sys-kernel/gentoo-kernel-bin-6.6.67 which was installed today triggering the reboot. However, I have some mounts (/var/lib/bacula in this case) mounted below /var. When I do a mount -a, it will always overmount /var even though it is already mounted. After that /var/lib/bacula is not available anymore. Reproducible: Always Steps to Reproduce: > mount proc on /proc type proc (rw,relatime,gid=4,hidepid=invisible) sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) devtmpfs on /dev type devtmpfs (rw,nosuid,noexec,size=10240k,nr_inodes=1518111,mode=755,inode64) devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000) tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,inode64) tmpfs on /run type tmpfs (rw,nosuid,nodev,noexec,mode=755,inode64) /dev/mapper/sysvg-lv_root on / type btrfs (rw,relatime,lazytime,compress=zstd:3,ssd,discard=async,space_cache=v2,autodefrag,subvolid=5,subvol=/) /dev/mapper/sysvg-lv_root on /usr type btrfs (rw,nodev,noatime,lazytime,compress=zstd:3,ssd,discard=async,space_cache=v2,autodefrag,subvolid=257,subvol=/usr) securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime) debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime) configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime) pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime) none on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate) mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime) binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nosuid,nodev,noexec,relatime) tmpfs on /tmp type tmpfs (rw,nosuid,nodev,relatime,inode64) /dev/mapper/sysvg-lv_root on /usr type btrfs (rw,nodev,noatime,lazytime,compress=zstd:3,ssd,discard=async,space_cache=v2,autodefrag,subvolid=257,subvol=/usr) /dev/mapper/sysvg-lv_root on /var type btrfs (rw,nosuid,relatime,lazytime,compress=zstd:3,ssd,discard=async,space_cache=v2,autodefrag,subvolid=261,subvol=/var) tmpfs on /media type tmpfs (rw,nosuid,nodev,noexec,relatime,size=100k,mode=755,inode64) tmpfs on /var/tmp/portage type tmpfs (rw,nosuid,nodev,relatime,size=4194304k,nr_inodes=1048576,mode=755,inode64) /dev/mapper/sysvg-lv_root on /usr type btrfs (rw,nodev,noatime,lazytime,compress=zstd:3,ssd,discard=async,space_cache=v2,autodefrag,subvolid=257,subvol=/usr) /dev/mapper/sysvg-lv_root on /var type btrfs (rw,nosuid,relatime,lazytime,compress=zstd:3,ssd,discard=async,space_cache=v2,autodefrag,subvolid=261,subvol=/var) /dev/mapper/sysvg-lv_root on /usr type btrfs (rw,nodev,noatime,lazytime,compress=zstd:3,ssd,discard=async,space_cache=v2,autodefrag,subvolid=257,subvol=/usr) /dev/mapper/sysvg-lv_root on /var type btrfs (rw,nosuid,relatime,lazytime,compress=zstd:3,ssd,discard=async,space_cache=v2,autodefrag,subvolid=261,subvol=/var) > mount -va / : ignored none : ignored none : ignored /proc : already mounted /tmp : already mounted /usr : successfully mounted /var : successfully mounted /home : ignored /misc : ignored /etc/secure : ignored /var/lib/bacula : ignored /root : ignored /media : already mounted /var/tmp/portage : already mounted /dos : ignored /cdrom : ignored /home/klaus/ifr : ignored Actual Results: /var (and /usr) is mounted more than once. Expected Results: Not mount /var (and /usr) again and again.
I checked. It is a bug of sys-kernel/gentoo-kernel-bin-6.6.67. Please reroute
(In reply to Klaus Ethgen from comment #1) > I checked. It is a bug of sys-kernel/gentoo-kernel-bin-6.6.67. Please reroute Please clarify what you checked. Does this not happen in older versions? Which versions?
I checked with kernel sys-kernel/gentoo-kernel-bin-6.6.62, where the bug does not appear. Currently I run that kernel now and did mask version 6.6.67 locally.
Is /etc/mtab a regular file or a symlink? Also, it may help to compare /proc/self/mountinfo with each kernel version.
lrwxrwxrwx 1 root root 19 28. Dez 14:55 /etc/mtab -> ../proc/self/mounts I cannot compare it anymore as I already purged the broken kernel. If it is really needed, I have to reinstall it again and boot the system. However, that is my main system and boot takes several minutes so I want to avoid again two reboots. (It took me half the day to even narrow the problem already.)
Created attachment 916261 [details] mountinfo v62
Created attachment 916262 [details] mountinfo v67
I added the both mountinfos direct after boot. The different in my eyes, it is already double mounted and using device /dev/dm-3 instead of /dev/mapper/sysvg-lv_root.
Version 6.6.74-gentoo-dist fixes the issue.
