[Bug 1118434] Re: lvm - freez any lvm command after lvremove

[Oliver Brakmann]

** Bug watch added: Debian Bug tracker #659762
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=659762

** Also affects: lvm2 (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=659762
   Importance: Unknown
       Status: Unknown

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Title:
   lvm - freez any lvm command after lvremove

Status in lvm2 - Logical Volume Manager:
  New
Status in “lvm2” package in Ubuntu:
  New
Status in “udev” package in Ubuntu:
  New
Status in “lvm2” package in Debian:
  Unknown

Bug description:
  1. Ubuntu - 12.10 quantal
  2. lvm2  - 2.02.95-4ubuntu1
  While deleting multiple snupshots, LVM get error. Any lvm command after the results freez.

  Reproduse:
  cat /dev/zero | dd of=./my_test_pv.bin bs=1M count=1024
  losetup /dev/loop0 ./my_test_pv.bin
  pvcreate /dev/loop0
  vgcreate my_test_vg /dev/loop0

  lvcreate my_test_vg --name test_lv_01 --size 100M
  lvcreate my_test_vg --name test_lv_02 --size 100M
  lvcreate my_test_vg --name test_lv_03 --size 100M
  lvcreate my_test_vg --name test_lv_04 --size 100M

  for i in 01 02 03 04; do lvcreate -s /dev/my_test_vg/test_lv_$i --name SS-$i --size 64M; done
    Logical volume "SS-01" created
    Logical volume "SS-02" created
    Logical volume "SS-03" created
    Logical volume "SS-04" created

  lvs
    LV         VG         Attr     LSize   Pool Origin     Data%  Move Log Copy%  Convert
    SS-01      my_test_vg swi-a-s-  64,00m      test_lv_01   0,00                        
    SS-02      my_test_vg swi-a-s-  64,00m      test_lv_02   0,00                        
    SS-03      my_test_vg swi-a-s-  64,00m      test_lv_03   0,00                        
    SS-04      my_test_vg swi-a-s-  64,00m      test_lv_04   0,00                        
    test_lv_01 my_test_vg owi-a-s- 100,00m                                               
    test_lv_02 my_test_vg owi-a-s- 100,00m                                               
    test_lv_03 my_test_vg owi-a-s- 100,00m                                               
    test_lv_04 my_test_vg owi-a-s- 100,00m                                               

  lvremove /dev/my_test_vg/SS-0* --force
    Unable to deactivate open my_test_vg-SS--01-cow (252:6)
    Failed to resume SS-01.
    Internal error: Writing metadata in critical section.
    Internal error: Performing unsafe table load while 1 device(s) are known to be suspended:  (252:1) 
    Internal error: Performing unsafe table load while 1 device(s) are known to be suspended:  (252:7) 
    Internal error: Writing metadata in critical section.
    Logical volume "SS-02" successfully removed
    Internal error: Writing metadata in critical section.
    Internal error: Performing unsafe table load while 1 device(s) are known to be suspended:  (252:2) 
    Internal error: Performing unsafe table load while 1 device(s) are known to be suspended:  (252:10) 
    Internal error: Writing metadata in critical section.
    Logical volume "SS-03" successfully removed
    Internal error: Writing metadata in critical section.
    Internal error: Performing unsafe table load while 1 device(s) are known to be suspended:  (252:3) 
    Internal error: Performing unsafe table load while 1 device(s) are known to be suspended:  (252:13) 
    Internal error: Writing metadata in critical section.
    Logical volume "SS-04" successfully removed
    libdevmapper exiting with 1 device(s) still suspended.

  lvs <- at this moment console freez... ctrl+c does not help
  --------------------
  in second console:

  dmsetup info /dev/mapper/my_test_vg-test_lv_0?
  Name:              my_test_vg-test_lv_01
  State:             SUSPENDED
  Read Ahead:        256
  Tables present:    LIVE & INACTIVE
  Open count:        2
  Event number:      0
  Major, minor:      252, 0
  Number of targets: 1
  UUID: LVM-e84Pj8WjgMKXulfJ1FDlXYxrNnnzRZWjUDyoMDJEXfF1cfV8vwmPPWl6uuzFcBRI

  Name:              my_test_vg-test_lv_02
  State:             ACTIVE
  Read Ahead:        256
  Tables present:    LIVE
  Open count:        0
  Event number:      0
  Major, minor:      252, 1
  Number of targets: 1
  UUID: LVM-e84Pj8WjgMKXulfJ1FDlXYxrNnnzRZWjazRu4GvINTLKl6Dz2dmmIqOZPCa7SL7W

  Name:              my_test_vg-test_lv_03
  State:             ACTIVE
  Read Ahead:        256
  Tables present:    LIVE
  Open count:        0
  Event number:      0
  Major, minor:      252, 2
  Number of targets: 1
  UUID: LVM-e84Pj8WjgMKXulfJ1FDlXYxrNnnzRZWj9HKgQcqI9w74Ks9zxkbdjiKEqxjN3UnB

  Name:              my_test_vg-test_lv_04
  State:             ACTIVE
  Read Ahead:        256
  Tables present:    LIVE
  Open count:        0
  Event number:      0
  Major, minor:      252, 3
  Number of targets: 1
  UUID: LVM-e84Pj8WjgMKXulfJ1FDlXYxrNnnzRZWjbAH0DdMfVoCrqRaggSjw0FXxrcGHswm6
   
  my_test_vg-test_lv_01 - are suspended

  dmsetup resume /dev/mapper/my_test_vg-test_lv_01

  at this momen lvs comman in first console unfreez
  -----------------------------------------
  console 1
    LV         VG         Attr     LSize   Pool Origin Data%  Move Log Copy%  Convert
    SS-01      my_test_vg -wi-a---  64,00m                                           
    test_lv_01 my_test_vg -wi-a--- 100,00m                                           
    test_lv_02 my_test_vg -wi-a--- 100,00m                                           
    test_lv_03 my_test_vg -wi-a--- 100,00m                                           
    test_lv_04 my_test_vg -wi-a--- 100,00m                                           

  repeat lvremove
  lvremove /dev/my_test_vg/SS-01
    Logical volume "SS-01" successfully removed

  I repeated the process with lvremove -vvvvv
  output attached

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