Swap not mounting sometimes

Bug #465083 reported by gondim on 2009-10-30
This bug affects 5 people
Affects Status Importance Assigned to Milestone
upstart (Ubuntu)
Nominated for Karmic by gondim

Bug Description

My system is Ubuntu Server 9.10 new instalation.
My fstab:

# /etc/fstab: static file system information.
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/mapper/vm-root / ext4 errors=remount-ro 0 1
# /boot was on /dev/sda5 during installation
UUID=8a29f36c-21ce-42fb-8da6-f5570a8770a2 /boot ext2 defaults 0 2
#/dev/mapper/vm-swap_1 none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0
/dev/mapper/cryptswap1 none swap sw 0 0

My system when rebooting sometimes mount swap and sometimes not mount.

(root@vm)[~]# date
Sex Out 30 14:08:35 BRST 2009
(root@vm)[~]# free
             total used free shared buffers cached
Mem: 896104 65236 830868 0 9220 31560
-/+ buffers/cache: 24456 871648
Swap: 2625528 0 2625528

after reboot

(root@vm)[~]# date
Sex Out 30 14:12:43 BRST 2009
(root@vm)[~]# free
             total used free shared buffers cached
Mem: 896104 64076 832028 0 9124 30956
-/+ buffers/cache: 23996 872108
Swap: 0 0 0

Swap with zeros

I can confirm this on a Xubuntu 9.10 GUI installation. I get an error that "swap b75499a0... from /etc/fstab is not mounted" while watching the white/black boot-screen. I checked using gparted and it is really unmounted. This happened at every reboot so far.

# /etc/fstab: static file system information.
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/hda1 -- converted during upgrade to edgy
UUID=3e29580d-44f8-43c6-8113-1846fd8400a9 / ext3 defaults,errors=remount-ro,user_xattr,relatime 0 1
# /dev/hda5 -- converted during upgrade to edgy
UUID=b75499a0-4951-4fae-b3a3-9f059b929a2b none swap sw 0 0

I guess it is a problem in upstart.

To be more precise the error says:
"one or more device in /etc/fstab not mounted
waiting for swap UUID=b75499a0-4951-4fae-b3a3-9f059b929a2b"

affects: ubuntu → upstart (Ubuntu)
gondim (gondim) wrote :

The problem only occurs when we choose to install a /home encrypted.

My /home is not encyrpted, so my problem might be unrelated.

gondim (gondim) wrote :

I see this bug as being serious. Because if the ram memory end and there is no swap, the system will fail.

My system is currently unusable as it boots into a state where the system kills all processes because there is not enough memory. It is hard to get any logs because multiple screens (grub, upstart text console) mix up. I saw "mountall: canceled" after the swap partition failed to mount. When I press ESC to get a root-console, the system simply boots further while I am trying to use the root-console - until it gets into the state where the RAM is overflowed.

The problem with encrypted filesystems might be related to Bug #460745 "Encrypted Swap no longer mounting".

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