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Subjectumount /var -> umount: /var: device is busy -- 2.4.0-ac6
Hi,


[1.] One line summary of the problem:
Unable to unmount all filesystems on my LVM

[2.] Full description of the problem/report:
On shutdown /var couldn't be umounted.
/usr is only possible to remount read only.
I detect this error on kernel release 2.4.0-ac5 and ac6.
2.4.0 works fine.

[3.] Keywords (i.e., modules, networking, kernel):

[4.] Kernel version (from /proc/version):
Linux version 2.4.0-ac6 (root@BOFH) (gcc version 2.95.2 19991024 (release)) #1 Fri Jan 12 00:37:16 /etc/localtime 2001

[5.] Output of Oops.. message (if applicable) with symbolic information
resolved (see Documentation/oops-tracing.txt)
[6.] A small shell script or example program which triggers the
problem (if possible)

# umount /var
umount: /var: device is busy


[7.] Environment
[7.1.] Software (add the output of the ver_linux script here)
[7.2.] Processor information (from /proc/cpuinfo):


processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 8
model name : AMD-K6(tm) 3D processor
stepping : 12
cpu MHz : 350.806
cache size : 64 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8 pge mmx syscall 3dnow k6_mtrr
bogomips : 699.59


[7.3.] Module information (from /proc/modules):


cs4232 2992 1
ad1848 16576 0 [cs4232]
uart401 6224 0 [cs4232]
sound 56176 1 [cs4232 ad1848 uart401]
soundcore 3952 4 [sound]
bttv 54896 0 (unused)
msp3400 13104 0 (unused)
tuner 3248 1
i2c-algo-bit 7104 1 [bttv]
i2c-dev 3680 0 (unused)
i2c-core 12752 0 [bttv msp3400 tuner i2c-algo-bit i2c-dev]
videodev 4544 2 [bttv]


[7.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem)


0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0213-0213 : isapnp read
02f8-02ff : serial(auto)
0340-035f : eth1
0376-0376 : ide1
0378-037a : parport0
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0530-0533 : Crystal audio controller
0a79-0a79 : isapnp write
0cf8-0cff : PCI conf1
5000-50ff : VIA Technologies, Inc. VT82C586B ACPI
d000-dfff : PCI Bus #01
d000-d0ff : 3Dfx Interactive, Inc. Voodoo 3
e000-e00f : VIA Technologies, Inc. Bus Master IDE
e000-e007 : ide0
e008-e00f : ide1
e800-e8ff : Macronix, Inc. [MXIC] MX987x5
e800-e8ff : eth0


00000000-0009fbff : System RAM
0009fc00-0009ffff : System RAM
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-07feffff : System RAM
00100000-00257827 : Kernel code
00257828-002e2ab7 : Kernel data
07ff0000-07ff2fff : ACPI Non-volatile Storage
07ff3000-07ffffff : ACPI Tables
e0000000-e3ffffff : PCI Bus #01
e0000000-e1ffffff : 3Dfx Interactive, Inc. Voodoo 3
e4000000-e5ffffff : PCI Bus #01
e4000000-e5ffffff : 3Dfx Interactive, Inc. Voodoo 3
e6000000-e6ffffff : VIA Technologies, Inc. VT82C597 [Apollo VP3]
e8000000-e80000ff : Macronix, Inc. [MXIC] MX987x5
e8000000-e80000ff : eth0
e8001000-e8001fff : Brooktree Corporation Bt848 TV with DMA push
e8001000-e8001fff : bttv
ffff0000-ffffffff : reserved


[7.5.] PCI information ('lspci -vvv' as root)


PCI devices found:
Bus 0, device 0, function 0:
Host bridge: VIA Technologies, Inc. VT82C597 [Apollo VP3] (rev 4).
Master Capable. Latency=16.
Prefetchable 32 bit memory at 0xe6000000 [0xe6ffffff].
Bus 0, device 1, function 0:
PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo MVP3/Pro133x AGP] (rev 0).
Master Capable. No bursts. Min Gnt=12.
Bus 0, device 7, function 0:
ISA bridge: VIA Technologies, Inc. VT82C586/A/B PCI-to-ISA [Apollo VP] (rev 71).
Bus 0, device 7, function 1:
IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 6).
Master Capable. Latency=64.
I/O at 0xe000 [0xe00f].
Bus 0, device 7, function 3:
Host bridge: VIA Technologies, Inc. VT82C586B ACPI (rev 16).
Bus 0, device 9, function 0:
Ethernet controller: Macronix, Inc. [MXIC] MX987x5 (rev 37).
IRQ 10.
Master Capable. Latency=64. Min Gnt=8.Max Lat=56.
I/O at 0xe800 [0xe8ff].
Non-prefetchable 32 bit memory at 0xe8000000 [0xe80000ff].
Bus 0, device 10, function 0:
Multimedia video controller: Brooktree Corporation Bt848 TV with DMA push (rev 18).
IRQ 12.
Master Capable. Latency=64. Min Gnt=16.Max Lat=40.
Prefetchable 32 bit memory at 0xe8001000 [0xe8001fff].
Bus 1, device 0, function 0:
VGA compatible controller: 3Dfx Interactive, Inc. Voodoo 3 (rev 1).
IRQ 11.
Non-prefetchable 32 bit memory at 0xe0000000 [0xe1ffffff].
Prefetchable 32 bit memory at 0xe4000000 [0xe5ffffff].
I/O at 0xd000 [0xd0ff].

[7.6.] SCSI information (from /proc/scsi/scsi)


Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: IDE-CD Model: R/RW 4x4x32 Rev: 1.10
Type: CD-ROM ANSI SCSI revision: 02

[7.7.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):

cat /proc/mounts:

/dev/ide/host0/bus0/target0/lun0/part2 / ext2 rw 0 0
none /dev devfs rw 0 0
proc /proc proc rw 0 0
/dev/discs/disc0/part1 /boot ext2 ro 0 0
/dev/main_vg/usr /usr ext2 rw 0 0
/dev/main_vg/var /var ext2 rw,noexec,nosuid 0 0
/dev/main_vg/home /home ext2 rw 0 0
/dev/main_vg/tmp /tmp ext2 rw,nosuid 0 0


vgdisplay:

--- Volume group ---
VG Name main_vg
VG Access read/write
VG Status available/resizable
VG # 0
MAX LV 256
Cur LV 5
Open LV 5
MAX LV Size 255.99 GB
Max PV 256
Cur PV 2
Act PV 2
VG Size 50.18 GB
PE Size 4 MB
Total PE 12846
Alloc PE / Size 12846 / 50.18 GB
Free PE / Size 0 / 0
VG UUID Wy5Iw0-lQ5T-1Ldu-baV5-O3ZA-4mvf-69JMgA

an fuser -v /var on an escapeshell in shutdownprocess:

USER PID ACCESS COMMAND
/var root kernel mount /var


[X.] Other notes, patches, fixes, workarounds:

2.4.0 works fine ac5 has the problem with both,
reiserFS-beta and ext2


bye
--
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