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[linux-lvm] remove



--- Tracy R Reed <treed copilotconsulting com> wrote:
> Linux home 2.4.20 #18 SMP Fri Sep 12 22:49:21 PDT
> 2003 i686 GNU/Linux
> home:~# lvcreate --version
>   LVM version:     1.95.15 (2003-01-10)
>   Library version: 0.96.07-ioctl-cvs (2002-11-21)
>   Driver version:  1.0.8
> 
> I created a script to take daily snapshots of my
> four logical volumes for
> backup purposes. Approximately every other time I
> run it the whole lvm
> system seems to freeze up. The first time it did
> this it crashed the whole
> computer by not allowing any writes to disk. The
> second two times the
> system didn't crash but I now have hung lvremove and
> lvcreate processes
> which appear to require a reboot to clear. strace on
> the processes shows
> nothing happening and kill -9 has no effect. In the
> dmesg I have lots of
> "invalidate: busy buffer" and then a kernel oops:
> 
> Unable to handle kernel NULL pointer dereference at
> virtual address
> 00000001
>  printing eip:
> ce6a16d0
> *pde = 00000000
> Oops: 0002
> CPU:    1
> EIP:    0010:[<ce6a16d0>]    Tainted: P
> EFLAGS: 00010202
> eax: ce6a16d0   ebx: ce6a16a0   ecx: 00000010   edx:
> ce6a16d0
> esi: 00000001   edi: 00000000   ebp: c023c230   esp:
> df6c3f3c
> ds: 0018   es: 0018   ss: 0018
> Process kcopyd (pid: 69, stackpage=df6c3000)
> Stack: c023b83a ce6a16d0 00000001 00000001 00000b76
> 00000000 0000001b
> 00000000
>        c7cc3c10 cda29004 00000010 c023a52f d41f3e8c
> c7c7b218 c023a4e0
> c7c7b218
>        c023c891 00000000 c7c7b218 cda29004 c031f858
> c023c240 cda29004
> c023c394
> Call Trace:    [<c023b83a>] [<c023a52f>]
> [<c023a4e0>] [<c023c891>]
> [<c023c240>]
>   [<c023c394>] [<c023c424>] [<c023c230>]
> [<c023c535>] [<c01075ee>]
> [<c023c480>]
>  
> Code: d0 16 6a ce d0 16 6a ce 00 00 00 00 69 dd 63
> 00 8c ff 7c f9
> 
> This seems to be a reproduceable problem. I was
> under the impression that
> LVM was fairly stable by this point. The first crash
> happened in the
> middle of a backup that had been running for 48
> hours which I will now
> have to restart. Not too happy. :( Uh oh...now the
> system can't write to
> disk again and I will have to reboot. 
> 
> -- 
> Tracy Reed
> http://copilotconsulting.com
> 

> ATTACHMENT part 2 application/pgp-signature 



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