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Subjectbug in vfat fs?

As the log message shown in attachment:
1. when I mkdir a new dircectory, rename it, and then rmdir it,
rmdir says(sometimes) "Device or resource busy".

2. If I rename a non-empty directory, the number of link of the
directory becomes zero. and it's content is the same as /mnt/dose,
the mount point of the partition the directory belongs to.

3. When I attempt to umount the partition, I got the message:
VFS: Busy inodes after unmount. Self-destruct in 5 seconds. Have a nice day...
If I mount this partition again, and then umount it, I still got
the same message.

dinon:~# cd /mnt/dose/backup/boot
dinon:/mnt/dose/backup/boot# ls -l
total 140
drwxr-xr-x 2 root root 4096 Nov 30 02:21 2.1.130/
drwxr-xr-x 2 root root 4096 Dec 6 11:23 2.1.131/
-rw-r--r-- 1 root root 1868 Jun 15 08:15 Index.txt
drwxr-xr-x 2 root root 4096 Mar 18 2032 dos/
-rw-r--r-- 1 root root 32208 Apr 10 1997 loadlin.exe
-rw-r--r-- 1 root root 32719 Apr 10 1997 manual.txt
-rw-r--r-- 1 root root 12511 Apr 10 1997 params.doc
-r--r--r-- 1 root root 36064 Apr 10 1997 rawrite.exe
drwxr-xr-x 2 root root 4096 Dec 6 21:54 redhat51/
drwxr-xr-x 2 root root 4096 Dec 6 21:53 slak35/
dinon:/mnt/dose/backup/boot# mkdir 1
dinon:/mnt/dose/backup/boot# ls -l
total 144
drwxr-xr-x 2 root root 4096 Dec 8 01:23 1/
drwxr-xr-x 2 root root 4096 Nov 30 02:21 2.1.130/
drwxr-xr-x 2 root root 4096 Dec 6 11:23 2.1.131/
-rw-r--r-- 1 root root 1868 Jun 15 08:15 Index.txt
drwxr-xr-x 2 root root 4096 Mar 18 2032 dos/
-rw-r--r-- 1 root root 32208 Apr 10 1997 loadlin.exe
-rw-r--r-- 1 root root 32719 Apr 10 1997 manual.txt
-rw-r--r-- 1 root root 12511 Apr 10 1997 params.doc
-r--r--r-- 1 root root 36064 Apr 10 1997 rawrite.exe
drwxr-xr-x 2 root root 4096 Dec 6 21:54 redhat51/
drwxr-xr-x 2 root root 4096 Dec 6 21:53 slak35/
dinon:/mnt/dose/backup/boot# ls -l 1
total 0
dinon:/mnt/dose/backup/boot# ls -l dos
total 1372
-rw-r--r-- 1 root root 11208 May 31 1994 attrib.exe
-rw-r--r-- 1 root root 57 Oct 11 1997 autoexec.bat
-rw-r--r-- 1 root root 2 Nov 14 21:42 boot.com
[stuff deleted]
-rw-r--r-- 1 root root 8368 Aug 23 1995 sample.sys
-rw-r--r-- 1 root root 124262 May 31 1994 scandisk.exe
-rw-r--r-- 1 root root 9432 May 31 1994 sys.com
-rw-r--r-- 1 root root 16930 May 31 1994 xcopy.exe
dinon:/mnt/dose/backup/boot# mv 1 2
dinon:/mnt/dose/backup/boot# ls -l
total 144
drwxr-xr-x 2 root root 4096 Dec 8 01:23 2/
drwxr-xr-x 2 root root 4096 Nov 30 02:21 2.1.130/
drwxr-xr-x 2 root root 4096 Dec 6 11:23 2.1.131/
-rw-r--r-- 1 root root 1868 Jun 15 08:15 Index.txt
drwxr-xr-x 2 root root 4096 Mar 18 2032 dos/
-rw-r--r-- 1 root root 32208 Apr 10 1997 loadlin.exe
-rw-r--r-- 1 root root 32719 Apr 10 1997 manual.txt
-rw-r--r-- 1 root root 12511 Apr 10 1997 params.doc
-r--r--r-- 1 root root 36064 Apr 10 1997 rawrite.exe
drwxr-xr-x 2 root root 4096 Dec 6 21:54 redhat51/
drwxr-xr-x 2 root root 4096 Dec 6 21:53 slak35/
dinon:/mnt/dose/backup/boot# mv dos floppy
dinon:/mnt/dose/backup/boot# ls -l
total 144
drwxr-xr-x 2 root root 4096 Dec 8 01:23 2/
drwxr-xr-x 2 root root 4096 Nov 30 02:21 2.1.130/
drwxr-xr-x 2 root root 4096 Dec 6 11:23 2.1.131/
-rw-r--r-- 1 root root 1868 Jun 15 08:15 Index.txt
drwxr-xr-x 0 root root 4096 Mar 18 2032 floppy/
-rw-r--r-- 1 root root 32208 Apr 10 1997 loadlin.exe
-rw-r--r-- 1 root root 32719 Apr 10 1997 manual.txt
-rw-r--r-- 1 root root 12511 Apr 10 1997 params.doc
-r--r--r-- 1 root root 36064 Apr 10 1997 rawrite.exe
drwxr-xr-x 2 root root 4096 Dec 6 21:54 redhat51/
drwxr-xr-x 2 root root 4096 Dec 6 21:53 slak35/
dinon:/mnt/dose/backup/boot# ls -l 2
total 0
dinon:/mnt/dose/backup/boot# rmdir 2
rmdir: 2: Device or resource busy
dinon:/mnt/dose/backup/boot# ls -l floppy
total 16
dr-xr-xr-x 4 root root 8192 Aug 25 02:02 CWIN98/
drwxr-xr-x 8 root root 4096 Nov 30 01:58 backup/
drwxr-xr-x 2 root root 4096 Nov 25 02:34 recycled/
dinon:/mnt/dose/backup/boot# ls -l /mnt/dose/
total 16
dr-xr-xr-x 4 root root 8192 Aug 25 02:02 CWIN98/
drwxr-xr-x 8 root root 4096 Nov 30 01:58 backup/
drwxr-xr-x 2 root root 4096 Nov 25 02:34 recycled/
dinon:/mnt/dose/backup/boot# cd /
dinon:/# umount /mnt/dose
VFS: Busy inodes after unmount. Self-destruct in 5 seconds. Have a nice day...
dinon:/# mount /mnt/dose
dinon:/# umount /mnt/dose
VFS: Busy inodes after unmount. Self-destruct in 5 seconds. Have a nice day...
dinon:/# logout
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