Comment 7 for bug 499773

This is affecting me when trying to copy a really large file mounted over CIFS, and it then dies as if I had ran out of space (but haven't):

$ time cp Ewrapped.sql /var/lib/mysql/
cp: writing `/var/lib/mysql/Ewrapped.sql': No space left on device

real 25m17.057s
user 0m0.356s
sys 0m43.167s

(fyi, the file is a > 9GB mysql dump)

This is also WEIRD:

$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 36G 36G 0 100% /
udev 1.5G 256K 1.5G 1% /dev
none 1.5G 184K 1.5G 1% /dev/shm
none 1.5G 164K 1.5G 1% /var/run
none 1.5G 0 1.5G 0% /var/lock
none 1.5G 0 1.5G 0% /lib/init/rw
none 36G 36G 0 100% /var/lib/ureadahead/debugfs
/dev/sda6 111G 11G 95G 10% /home

debugfs with 36G/36G used, 0% free?

$ status ureadahead
ureadahead stop/waiting

$ uname -a
Linux garepa-desktop 2.6.31-16-generic #53-Ubuntu SMP Tue Dec 8 04:01:29 UTC 2009 i686 GNU/Linux

$ cat /proc/self/mountinfo
15 18 0:0 / /sys rw,nosuid,nodev,noexec,relatime - sysfs none rw
16 18 0:3 / /proc rw,nosuid,nodev,noexec,relatime - proc none rw
17 18 0:15 / /dev rw,relatime - tmpfs udev rw,mode=755
18 1 8:1 / / rw,relatime - ext3 /dev/disk/by-uuid/f3dfd3ac-4485-4d7a-b8e0-bfb4f7094a9e rw,errors=remount-ro,data=writeback
19 15 0:8 / /sys/kernel/security rw,relatime - securityfs none rw
21 15 0:16 / /sys/fs/fuse/connections rw,relatime - fusectl none rw
22 15 0:5 / /sys/kernel/debug rw,relatime - debugfs none rw
23 17 0:11 / /dev/pts rw,nosuid,noexec,relatime - devpts none rw,gid=5,mode=620,ptmxmode=000
24 17 0:17 / /dev/shm rw,nosuid,nodev,relatime - tmpfs none rw
25 18 0:18 / /var/run rw,nosuid,relatime - tmpfs none rw,mode=755
26 18 0:19 / /var/lock rw,nosuid,nodev,noexec,relatime - tmpfs none rw
27 18 0:20 / /lib/init/rw rw,nosuid,relatime - tmpfs none rw,mode=755
28 18 8:6 / /home rw,nosuid,nodev,relatime - ext3 /dev/sda6 rw,errors=continue,data=writeback
29 28 0:21 / /home/garen/.gvfs rw,nosuid,nodev,relatime - fuse.gvfs-fuse-daemon gvfs-fuse-daemon rw,user_id=1000,group_id=1000
30 16 0:22 / /proc/sys/fs/binfmt_misc rw,nosuid,nodev,noexec,relatime - binfmt_misc binfmt_misc rw
20 18 0:23 / /mnt/nyquist/DailySnapshots rw,relatime - cifs //nyquist/Daily\040Snapshots rw,mand,unc=\\nyquist\Daily Snapshots,username=garepa,uid=0,noforceuid,gid=0,noforcegid,addr=10.100.0.57,file_mode=0755,dir_mode=0755,serverino,rsize=16384,wsize=57344