[linux-lvm] Kernel OOPS (LVM 0.7)

[James Pattinson]

Hi

First of all, cheer for LVM, I think it's great and I've been using it for
a while. However, last night I rebuilt my machine and now all my
partitions reside on a vg called vg00:

[root at greebo][/root]# df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/vg00/lvol1         507583     33506    468835   7% /
/dev/vg00/lvol2        1387224   1207850    165038  88% /usr
/dev/vg00/lvol3          63455     43048     19752  69% /var
/dev/vg00/lvol4         126911       210    125391   0% /tmp
/dev/vg00/lvol5         507583    368299    134042  73% /opt
/dev/vg00/lvol6        2479898   2130797    323461  87% /root
/dev/vg00/lvol7        1014911    977436     26990  97% /home
/dev/vg00/lvol8        3041663   2107704    902502  70% /fuse_backup
/dev/hda1                15522      9656      5065  66% /boot

I'm using an initrd that does a vgscan and a vgchange -a y then init
mounts /dev/vg00/lvol1 as root. This all seemed to be working fine however
I can't seem to create new LV's now:

[root at greebo][/root]# lvcreate -i 2 -I 8 -L16 -nchunk1 vgdb
Segmentation fault
[root at greebo][/root]#

I get the same result regardless of which volume group I use (vgdb or
vg00) or whether I ask it to stripe or not.

Here's the kernel message related to the command:

[root at greebo][/root]# dmesg -c
Unable to handle kernel NULL pointer dereference at virtual address
00000000
current->tss.cr3 = 09e8e000, %cr3 = 09e8e000
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c0192281>]
EFLAGS: 00010282
eax: 00000000   ebx: c02598a0   ecx: 00000000   edx: 00000030
esi: 00000020   edi: 00000000   ebp: c9ecbe40   esp: c9ecbcdc
ds: 0018   es: 0018   ss: 0018
Process lvcreate (pid: 4136, process nr: 46, stackpage=c9ecb000)
Stack: 00000000 c02598a0 bffff14c cb00ddc0 c9ecbe40 c9eca000 00000020
ffffffff
       00000000 40039948 d0808000 40039080 000008c8 00000000 ca860018
c018e907
       00000000 c02598a0 c9ecbe40 cb00ddc0 c9f9d680 ffffffe7 bffff14c
4004fe20
Call Trace: [<c018e907>] [<c01e79f4>] [<c012eafa>] [<c011e8bb>]
[<c01322c1>] [<c0128ae6>] [<c010a034>]
Code: 8a 11 84 d2 74 17 90 8a 03 84 c0 74 0c 38 c2 75 16 41 43 8a

I'm using stock kernel 2.2.12, with the LVM patch applied. Below is the
output of some VG commands that might help.

I hope someone can help me out, as I can't create LV's!

Cheers

James

------

--- Volume group ---
VG Name               vgdb
VG Access             read/write
VG Status             available/resizable
VG #                  1
MAX LV                256
Cur LV                1
Open LV               0
MAX LV Size           255.99 GB
Max PV                256
Cur PV                2
Act PV                2
VG Size               1264 MB
PE Size               4 MB
Total PE              316
Alloc PE / Size       4 / 16 MB
Free  PE / Size       312 / 1248 MB

--- Volume group ---
VG Name               vg00
VG Access             read/write
VG Status             available/resizable
VG #                  0
MAX LV                256
Cur LV                8
Open LV               8
MAX LV Size           255.99 GB
Max PV                256
Cur PV                2
Act PV                2
VG Size               15.7 GB
PE Size               4 MB
Total PE              4020
Alloc PE / Size       2304 / 9 GB
Free  PE / Size       1716 / 6.7 GB