From: Andrew Walrond <andrew@walrond.org>
To: util-linux@vger.kernel.org
Subject: Mount -a and bind mounts. Bug?
Date: Fri, 9 Dec 2011 12:33:58 +0000 [thread overview]
Message-ID: <20111209123357.GA3173@golden.localdomain> (raw)
When using bind mounts, particularly when they are specified in /etc/fstab, 'mount -a' does not recognise that a mount is already mounted and will rebind another copy over the top with each mount -a.
Is this the expected behaviour? I'm not sure so I thought I'd ask.
I'm using v2.20.1.
Example:
user@localhost ~ $ cat /etc/fstab
#FILESYSTEM MOUNTPOINT TYPE OPTIONS BACKUP FSCK-PASS
/root/etc /etc none bind 0 0
/root/home /home none bind 0 0
/root/local /local none bind 0 0
/root/mnt /mnt none bind 0 0
/root/tmp /tmp none bind 0 0
/root/var /var none bind 0 0
/root/swap none swap sw 0 0
user@localhost ~ $ mount
rootfs on / type rootfs (rw,size=0k,nr_inodes=0)
none on /dev type devtmpfs (rw,relatime,size=7202028k,nr_inodes=1800507,mode=755)
none on /proc type proc (rw,relatime)
none on /sys type sysfs (rw,relatime)
none on /dev/pts type devpts (rw,relatime,gid=3,mode=620)
none on /dev/shm type tmpfs (rw,relatime)
/dev/vda on /root type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /etc type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /home type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /local type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /mnt type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /tmp type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /var type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
user@localhost ~ $ sudo mount -a
user@localhost ~ $ mount
rootfs on / type rootfs (rw,size=0k,nr_inodes=0)
none on /dev type devtmpfs (rw,relatime,size=7202028k,nr_inodes=1800507,mode=755)
none on /proc type proc (rw,relatime)
none on /sys type sysfs (rw,relatime)
none on /dev/pts type devpts (rw,relatime,gid=3,mode=620)
none on /dev/shm type tmpfs (rw,relatime)
/dev/vda on /root type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /etc type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /home type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /local type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /mnt type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /tmp type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /var type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /etc type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /home type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /local type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /mnt type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /tmp type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
/dev/vda on /var type ext4 (rw,relatime,user_xattr,acl,barrier=1,data=ordered)
next reply other threads:[~2011-12-09 12:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-09 12:33 Andrew Walrond [this message]
2011-12-09 12:48 ` Mount -a and bind mounts. Bug? Karel Zak
2011-12-09 12:55 ` Andrew Walrond
2011-12-09 13:01 ` Karel Zak
2011-12-09 13:03 ` Karel Zak
2011-12-09 13:15 ` Andrew Walrond
2011-12-09 12:50 ` Andrew Walrond
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