[dm-devel] [2.6.14-rc3-git3/x86_64]: lvrename stalls on rename snapshot volume

[Tomasz Kłoczko]

[root at v20z-2 ~]# vgs -a; lvs
File descriptor 3 left open
File descriptor 5 left open
File descriptor 7 left open
   VG     #PV #LV #SN Attr  VSize   VFree
   users    1   2   0 wz--n 499,99G 49,99G
   v20z.2   1   3   0 wz--n  63,75G     0
   zie      1   3   0 wz--n 124,99G 56,99G
File descriptor 3 left open
File descriptor 5 left open
File descriptor 7 left open
   LV       VG     Attr   LSize   Origin Snap%  Move Log Copy%
   prac     users  -wi-ao 225,00G
   studenci users  -wi-ao 225,00G
   home     v20z.2 -wi-ao  33,75G
   root     v20z.2 -wi-ao  10,00G
   var      v20z.2 -wi-ao  20,00G
   mail     zie    -wi-ao  24,00G
   mailman  zie    -wi-ao   8,00G
[root at v20z-2 ~]# lvcreate -s -L5G -c 4k -p r -n prac-1 /dev/users/prac
File descriptor 3 left open
File descriptor 5 left open
File descriptor 7 left open
   Logical volume "prac-1" created
[root at v20z-2 ~]# lvs -a
File descriptor 3 left open
File descriptor 5 left open
File descriptor 7 left open
   LV       VG     Attr   LSize   Origin Snap%  Move Log Copy%
   prac     users  owi-ao 225,00G
   [prac-1] users  sri-a-   5,00G prac     0,00
   studenci users  -wi-ao 225,00G
   home     v20z.2 -wi-ao  33,75G
   root     v20z.2 -wi-ao  10,00G
   var      v20z.2 -wi-ao  20,00G
   mail     zie    -wi-ao  24,00G
   mailman  zie    -wi-ao   8,00G
   srv      zie    -wi-ao  36,00G
[root at v20z-2 ~]# lvrename /dev/users/prac-1 /dev/users/prac-2
File descriptor 3 left open
File descriptor 5 left open
File descriptor 7 left open

And in this poind lvrename stalls with sleeping in kernel in function:

# ps -eo wchan,args | grep lvrename
sync_b lvrename /dev/users/prac-1 /dev/users/prac-2
^^^^^^

lvrename can't be killed. Also system can't be shutdowned because hanging 
lvrename stops shutdown. All other works correctly and there is kernel 
messages.

kloczek
-- 
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*Ludzie nie mają problemów, tylko sobie sami je stwarzają*
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Tomasz Kłoczko, sys adm @zie.pg.gda.pl|*e-mail: kloczek at rudy.mif.pg.gda.pl*