zfs discuss - Nov 2005 - Files from other files systems "leaks" when using du

Hi,

I''m running Nevada 27a (upgraded from source from 26) on an x86  
machine and am using zfs.  I''m observing strange behaviour when  
using /bin/du to check space on a zfs file system.  I''m also using  
snapshots.  For example:

% df -kh -F zfs
Filesystem             size   used  avail capacity  Mounted on
fs                     110G    13K    63G     1%    /fs
fs/backup              110G    34G    63G    35%    /fs/backup
fs/cvs                 110G    12K    63G     1%    /fs/cvs
fs/cvs/dragonflybsd    1.0G   658M   361M    65%    /fs/cvs/dragonflybsd
fs/cvs/freebsd         4.0G   2.6G   1.3G    67%    /fs/cvs/freebsd
fs/cvs/netbsd          4.0G   3.6G   390M    91%    /fs/cvs/netbsd
fs/cvs/openbsd         4.0G   2.5G   1.5G    64%    /fs/cvs/openbsd
fs/cvs/opendarwin      4.0G   1.0G   3.0G    27%    /fs/cvs/opendarwin
fs/cvs/xfree86         4.0G   857M   3.2G    21%    /fs/cvs/xfree86
fs/cvs/xorg            4.0G   915M   3.1G    23%    /fs/cvs/xorg
fs/distfiles           4.0G   228M   3.8G     6%    /fs/distfiles
fs/home                 16G     8K    16G     1%    /fs/home
fs/home/krister        4.0G     8K   4.0G     1%    /fs/home/krister
fs/local               650M     8K   590M     1%    /fs/local
fs/src                 650M   420M   230M    65%    /fs/src
fs/var                 650M     8K   649M     1%    /fs/var
fs/work                650M     8K   397M     1%    /fs/work
% cd /fs/local
% ls -la
total 4
drwxr-xr-x   2 root     sys            2 Nov 20 05:45 .
drwxr-xr-x  10 root     sys           10 Nov 19 13:50 ..
dr-xr-xr-x   3 root     root           3 Nov 23 20:14 .zfs
% /bin/du
2       ./.zfs/snapshot/original/emul
4       ./.zfs/snapshot/original
4       ./.zfs/snapshot
4       ./.zfs
0       ./backup/.zfs/snapshot
0       ./backup/.zfs
72      ./backup/cvs/wine/wine/controls/Attic
3759    ./backup/cvs/wine/wine/controls
813     ./backup/cvs/wine/wine/windows/Attic
1632    ./backup/cvs/wine/wine/windows/x11drv/Attic
1634    ./backup/cvs/wine/wine/windows/x11drv
130     ./backup/cvs/wine/wine/windows/ttydrv/Attic
132     ./backup/cvs/wine/wine/windows/ttydrv
10875   ./backup/cvs/wine/wine/windows
1213    ./backup/cvs/wine/wine/loader/Attic
288     ./backup/cvs/wine/wine/loader/dos/Attic
290     ./backup/cvs/wine/wine/loader/dos
305     ./backup/cvs/wine/wine/loader/ne/Attic
822     ./backup/cvs/wine/wine/loader/ne
3357    ./backup/cvs/wine/wine/loader
^C

Using truss on du it seems that maybe chdir("..") in the snapshot  
directories is the culprit because du also doesn''t get the size of  
the snapshot directory correct.

-- 
Krister