1. If one lowerdir-folder path includes a number, fails to mount. 3. Keywords: overlayfs, overlay 4. Linux version 3.18.0+ (user@localhost) (gcc version 4.9.1 (Debian 4.9.1-19) ) #4 SMP Mon Jan 12 19:31:53 CET 2015 6. The following script reproduces the behaviour on my machine: #! /bin/bash mkdir -p /tmp/a mkdir -p /tmp/b0/b mkdir -p /tmp/merged mkdir -p /tmp/a0 mkdir -p /tmp/0a mkdir -p /tmp/a0a touch /tmp/a/A touch /tmp/a0/A touch /tmp/0a/A touch /tmp/a0a/A touch /tmp/b0/b/A sudo mount -t overlay -o lowerdir=/tmp/a,/tmp/a0 overlay /tmp/merged ret=$(echo $?) echo $ret if [[ "$ret" == "0" ]]; then sudo umount /tmp/merged fi sudo mount -t overlay -o lowerdir=/tmp/a,/tmp/0a overlay /tmp/merged ret=$(echo $?) echo $ret if [[ "$ret" == "0" ]]; then sudo umount /tmp/merged fi sudo mount -t overlay -o lowerdir=/tmp/a,/tmp/a0a overlay /tmp/merged ret=$(echo $?) echo $ret if [[ "$ret" == "0" ]]; then sudo umount /tmp/merged fi sudo mount -t overlay -o lowerdir=/tmp/a,/tmp/b0/b overlay /tmp/merged ret=$(echo $?) echo $ret if [[ "$ret" == "0" ]]; then sudo umount /tmp/merged fi 7. Environment TERM=xterm LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.axa=00;36:*.oga=00;36:*.spx=00;36:*.xspf=00;36: PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin LANG=de_DE.UTF-8 PS1=\[\e[1;32m\]\u@\h:\w${text}$\[\e[m\] LANGUAGE= DISPLAY=:0 SHELL=/bin/bash MAIL=/var/mail/root LOGNAME=root USER=root USERNAME=root HOME=/root SUDO_COMMAND=/usr/bin/env SUDO_USER=zeroxray SUDO_UID=1000 SUDO_GID=1000 7.1 what does ver_linux do? made overlayfs builtin dunno wether it matters.. If some fields are empty or look unusual you may have an old version. Compare to the current minimal requirements in Documentation/Changes. Linux debian-desktop-mine 3.18.0+ #4 SMP Mon Jan 12 19:31:53 CET 2015 x86_64 GNU/Linux Gnu C 4.9.1 Gnu make 4.0 binutils 2.24.90.20141023 util-linux scripts/ver_linux: 23: scripts/ver_linux: fdformat: not found mount debug module-init-tools found Linux C Library 2.19 Dynamic linker (ldd) 2.19 Procps 3.3.9 Kbd 1.15.5 Sh-utils 8.23 Modules Loaded vfat fat bnep bridge stp llc nfnetlink_queue nfnetlink_log nfnetlink bluetooth cfg80211 binfmt_misc rfkill crc16 iptable_filter ip_tables x_tables nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc x86_pkg_temp_thermal intel_powerclamp intel_rapl coretemp kvm_intel iTCO_wdt snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi kvm iTCO_vendor_support nouveau video ttm snd_hda_intel mxm_wmi xhci_pci joydev evdev drm_kms_helper snd_hda_controller snd_hda_codec psmouse snd_hwdep serio_raw xhci_hcd drm lpc_ich mei_me snd_pcm snd_timer snd i2c_algo_bit i2c_i801 soundcore i2c_core mei mfd_core tpm_infineon tpm_tis tpm wmi pcspkr shpchp processor button thermal_sys cuse fuse parport_pc ppdev lp parport loop autofs4 algif_skcipher af_alg dm_crypt dm_mod hid_cherry hid_generic usbhid hid sg sr_mod cdrom sd_mod crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd ahci libahci libata firewire_ohci scsi_mod firewire_core ehci_pci crc_itu_t r8169 ehci_hcd mii usbcore usb_common If more stuff is needed tell me, but I cant see what other things would have to do with the problem. The used tree comes from https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs- next commit 4330397e4e8a662f36d101659e2a59ce32e76ff4 -- To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html