Description of problem: I have several NFS mounts defined in /etc/fstab. They tend to fail to mount at boot time. This likely happens because the mount attempt is started before the network is fully operational, and therefore before the system is able to resolve the hostname of the NFS servers using DNS. However as the mounts aren't essential to the boot process, this initial failure doesn't really matter all that much, as long as they get mounted eventually I'm happy. Therefore I specify the "bg" option to instruct the mount process to keep trying to mount them until it succeeds. According to man 5 nfs: If the bg option is specified, a timeout or failure causes the mount(8) command to fork a child which con‐ tinues to attempt to mount the export. The parent imme‐ diately returns with a zero exit code. This is known as a "background" mount. Version-Release number of selected component (if applicable): nfs-utils-1.2.8-4.0.fc19.x86_64 How reproducible: 100% Steps to Reproduce: 1. Purge all "nameserver" entries from /etc/resolv.conf (required only to cause the exact same "System error" failures I see in my logs) 2. sudo mount nonexistant.domain.haha:/foo /mnt -o bg ; pgrep -f mount || echo no mount process running in background Actual results: Output from #2 is: mount.nfs: Failed to resolve server nonexistant.domain.haha: System error no mount process running in background (If step #1 is omitted, the error message is instead "Name or service not known", but the result is the same - the bg option fails to work as advertised.) Expected results: A backgrounded mount process would appear in the process list, and (assuming I had specified a valid NFS server/export) the file system would eventually be mounted after reinstating the nameserver entry in /etc/resolv.conf. Additional info: These messages from /var/log/messages shed some light on what's going on: Sep 20 09:33:52 echo systemd[1]: Mounting /music... Sep 20 09:33:52 echo mount[637]: mount.nfs: Failed to resolve server nfsd.domain.tld: System error Sep 20 09:33:52 echo systemd[1]: Dependency failed for Remote File Systems. Sep 20 09:33:52 echo systemd[1]: music.mount mount process exited, code=exited status=32 Sep 20 09:33:52 echo systemd[1]: Failed to mount /music.
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