[linux-lvm] new process dead after create multiple snapshot volumes

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* [linux-lvm] new process dead after create multiple snapshot volumes
@ 2005-09-12  2:34 Bear Wolf
  2005-09-12  8:05 ` Lars Ellenberg
  0 siblings, 1 reply; 8+ messages in thread
From: Bear Wolf @ 2005-09-12  2:34 UTC (permalink / raw)
  To: linux-lvm

Dear all 

I test snapshot function on my system.
when I create the first snapshot, everything works fine.
then I create more snapshot, everything works fine too.
but when I access the source volume and do sync
the sync command will be dead.

and I test with a script file

I=0
for I in 1 2 3 4 5 6 7 8 9
do
cp -af /etc /mnt/volume1
lvcreate -s -L 64 -n snaplv${I} /dev/VG01/volume1
sleep 1
done

after create the 4th sn apshot volume, the system process hang without
any error message.

result of ps
------------------------------------------------------------
 2259 pts/1    S+     0:00 bash test.sh
 2267 ?        S      0:00 [xfssyncd]
 2278 ?        S<     0:00 [kcopyd]
 2318 pts/1    D+     0:00 cp -af /etc /mnt/volume1/etc5


log of create the 4th snapstot volume
----------------------------------------------------
    Setting chunksize to 16 sectors.
    Finding volume group "VG01"
    Creating logical volume snaplv4
    Creating volume group backup "/etc/lvm/backup/VG01" (seqno 9).
    Found volume group "VG01"
    Loading VG01-snaplv4
    Zeroing start of logical volume "snaplv4"
    Found volume group "VG01"
    Removing VG01-snaplv4
    Found volume group "VG01"
    Found volume group "VG01"
    Found volume group "VG01"
    Loading VG01-snaplv1-cow
    Loading VG01-volume1-real
    Loading VG01-snaplv1
    Loading VG01-snaplv3-cow
    Loading VG01-snaplv3
    Loading VG01-snaplv4-cow
    Loading VG01-snaplv4
    Loading VG01-snaplv2-cow
    Loading VG01-snaplv2
    Loading VG01-volume1
    Creating volume group backup "/etc/lvm/backup/VG01" (seqno 10).
  Logical volume "snaplv4" created

resultof lvscan
-----------------------
  ACTIVE   Original '/dev/VG01/volume1' [128.00 MB] inherit
  ACTIVE   Snapshot '/dev/VG01/snaplv1' [64.00 MB] inherit
  ACTIVE   Snapshot '/dev/VG01/snaplv2' [64.00 MB] inherit
  ACTIVE   Snapshot '/dev/VG01/snaplv3' [64.00 MB] inherit
  ACTIVE   Snapshot '/dev/VG01/snaplv4' [64.00 MB] inherit

dmesg and messages has no error.

is this a known issue of snapshot?

Kernel 2.6.13
LVM version:     2.01.14 (2005-08-04)
Library version: 1.01.04 (2005-08-02)
Driver version:  4.4.0

Thanks.
SportBear

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] new process dead after create multiple snapshot volumes
  2005-09-12  2:34 [linux-lvm] new process dead after create multiple snapshot volumes Bear Wolf
@ 2005-09-12  8:05 ` Lars Ellenberg
  2005-09-12  8:42   ` Bear Wolf
  0 siblings, 1 reply; 8+ messages in thread
From: Lars Ellenberg @ 2005-09-12  8:05 UTC (permalink / raw)
  To: linux-lvm

/ 2005-09-12 10:34:15 +0800
\ Bear Wolf:
> Dear all 
> 
> I test snapshot function on my system.
> when I create the first snapshot, everything works fine.
> then I create more snapshot, everything works fine too.
> but when I access the source volume and do sync
> the sync command will be dead.
> 
> and I test with a script file
> 
> I=0
> for I in 1 2 3 4 5 6 7 8 9
> do
> cp -af /etc /mnt/volume1
> lvcreate -s -L 64 -n snaplv${I} /dev/VG01/volume1
> sleep 1
> done
> 
> after create the 4th sn apshot volume, the system process hang without
> any error message.

lvcreate calls into device mapper.
it suspends the affected targets, changes "tables", creates new targets,
and resumes the targets again.

if it fails to create the new targets, or fails to adjust the "tables",

then it unfortunately aborts, leaving the existing targets in suspended
state. I think that is a bug.

to get the system working (sort of) again, you could try to
for d in /dev/mapper/* ; do
	[[ $d == control ]] && continue
	dmsetup resume $d &
	               # ^^^ important! background it!
done

background it, because if you "resume" some target that depends on some
other target in suspended state, it will hang and wait for that other
target to be resumed... doh.

worked for me... (well, to get the system back, at least).

see also dmsetup ls, dmsetup info, dmsetp table etc.

cheers,

-- 
: Lars Ellenberg                                  Tel +43-1-8178292-0  :
: LINBIT Information Technologies GmbH            Fax +43-1-8178292-82 :
: Schoenbrunner Str. 244, A-1120 Vienna/Europe   http://www.linbit.com :

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] new process dead after create multiple snapshot volumes
  2005-09-12  8:05 ` Lars Ellenberg
@ 2005-09-12  8:42   ` Bear Wolf
  2005-09-17  6:27     ` Bear Wolf
  0 siblings, 1 reply; 8+ messages in thread
From: Bear Wolf @ 2005-09-12  8:42 UTC (permalink / raw)
  To: LVM general discussion and development

Dear Lars

I tried but not work,
the process is still hang when I trying to copy some data in source
volume or do sync command after create the 4rd snapshot volume.

should I patch the 8 and 9 of dm module?
ftp://sources.redhat.com/pub/dm/patches/2.6-unstable/2.6.12-rc2/2.6.12-rc2-udm1/

I saw that some discuss in previous mail-list

SportBear

2005/9/12, Lars Ellenberg <Lars.Ellenberg@linbit.com>:
> / 2005-09-12 10:34:15 +0800
> \ Bear Wolf:
> > Dear all
> >
> > I test snapshot function on my system.
> > when I create the first snapshot, everything works fine.
> > then I create more snapshot, everything works fine too.
> > but when I access the source volume and do sync
> > the sync command will be dead.
> >
> > and I test with a script file
> >
> > I=0
> > for I in 1 2 3 4 5 6 7 8 9
> > do
> > cp -af /etc /mnt/volume1
> > lvcreate -s -L 64 -n snaplv${I} /dev/VG01/volume1
> > sleep 1
> > done
> >
> > after create the 4th sn apshot volume, the system process hang without
> > any error message.
> 
> lvcreate calls into device mapper.
> it suspends the affected targets, changes "tables", creates new targets,
> and resumes the targets again.
> 
> if it fails to create the new targets, or fails to adjust the "tables",
> 
> then it unfortunately aborts, leaving the existing targets in suspended
> state. I think that is a bug.
> 
> to get the system working (sort of) again, you could try to
> for d in /dev/mapper/* ; do
>        [[ $d == control ]] && continue
>        dmsetup resume $d &
>                       # ^^^ important! background it!
> done
> 
> background it, because if you "resume" some target that depends on some
> other target in suspended state, it will hang and wait for that other
> target to be resumed... doh.
> 
> worked for me... (well, to get the system back, at least).
> 
> see also dmsetup ls, dmsetup info, dmsetp table etc.
> 
> cheers,
> 
> --
> : Lars Ellenberg                                  Tel +43-1-8178292-0  :
> : LINBIT Information Technologies GmbH            Fax +43-1-8178292-82 :
> : Schoenbrunner Str. 244, A-1120 Vienna/Europe   http://www.linbit.com :
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] new process dead after create multiple snapshot volumes
  2005-09-12  8:42   ` Bear Wolf
@ 2005-09-17  6:27     ` Bear Wolf
  2005-09-17  8:23       ` Bear Wolf
  2005-09-17 19:16       ` Lars Ellenberg
  0 siblings, 2 replies; 8+ messages in thread
From: Bear Wolf @ 2005-09-17  6:27 UTC (permalink / raw)
  To: LVM general discussion and development

I also found the process dead, that is "pdflush"
there're 2 "pdflush" always running on my system,
but one is dead after I create the 3rd snapshot volumes and access the
source volume then sync

-bash-3.00# ps x
  PID TTY      STAT   TIME COMMAND
    1 ?        S      0:01 init [2]
    2 ?        S      0:00 [migration/0]
    3 ?        SN     0:00 [ksoftirqd/0]
    4 ?        S<     0:00 [events/0]
    5 ?        S<     0:00 [khelper]
    6 ?        S<     0:00 [kthread]
    8 ?        S<     0:00 [kacpid]
   70 ?        S<     0:00 [kblockd/0]
   73 ?        S<     0:00 [khubd]
  129 ?        S      0:00 [pdflush]
  130 ?        D      0:00 [pdflush]
  132 ?        S<     0:00 [aio/0]
  131 ?        S      0:00 [kswapd0]
  134 ?        S<     0:00 [xfslogd/0]
  133 ?        S      0:00 [cifsoplockd]
  135 ?        S<     0:00 [xfsdatad/0]
  136 ?        S      0:00 [xfsbufd]
  723 ?        S<     0:00 [kseriod]
  773 ?        S      0:00 [scsi_eh_0]
  777 ?        S<     0:00 [ata/0]
  801 ?        S<     0:00 [kcryptd/0]
  934 ?        S<     0:00 [kcopyd]
 1330 ?        Ss     0:00 syslogd -m 0
 1334 ?        Ss     0:00 klogd -x
 1343 ?        Ss     0:00 /usr/httpd/bin/httpd
 1353 ?        Ss     0:00 crond
 1359 ?        Ss     0:00 /bin/profamd
 1479 tty1     Ss     0:00 -bash
 1481 tty2     Ss+    0:00 -bash
 1483 tty3     Ss+    0:00 /sbin/mingetty tty3
 1485 tty4     Ss+    0:00 /sbin/mingetty tty4
 1487 tty5     Ss+    0:00 /sbin/mingetty tty5
 1903 ?        S      0:00 [xfssyncd]
 1915 tty1     D+     0:00 sync
 2037 pts/0    R+     0:00 ps x

Rocky

2005/9/12, Bear Wolf <sportbear@gmail.com>:
> Dear Lars
> 
> I tried but not work,
> the process is still hang when I trying to copy some data in source
> volume or do sync command after create the 4rd snapshot volume.
> 
> should I patch the 8 and 9 of dm module?
> ftp://sources.redhat.com/pub/dm/patches/2.6-unstable/2.6.12-rc2/2.6.12-rc2-udm1/
> 
> I saw that some discuss in previous mail-list
> 
> SportBear
> 
> 2005/9/12, Lars Ellenberg <Lars.Ellenberg@linbit.com>:
> > / 2005-09-12 10:34:15 +0800
> > \ Bear Wolf:
> > > Dear all
> > >
> > > I test snapshot function on my system.
> > > when I create the first snapshot, everything works fine.
> > > then I create more snapshot, everything works fine too.
> > > but when I access the source volume and do sync
> > > the sync command will be dead.
> > >
> > > and I test with a script file
> > >
> > > I=0
> > > for I in 1 2 3 4 5 6 7 8 9
> > > do
> > > cp -af /etc /mnt/volume1
> > > lvcreate -s -L 64 -n snaplv${I} /dev/VG01/volume1
> > > sleep 1
> > > done
> > >
> > > after create the 4th sn apshot volume, the system process hang without
> > > any error message.
> >
> > lvcreate calls into device mapper.
> > it suspends the affected targets, changes "tables", creates new targets,
> > and resumes the targets again.
> >
> > if it fails to create the new targets, or fails to adjust the "tables",
> >
> > then it unfortunately aborts, leaving the existing targets in suspended
> > state. I think that is a bug.
> >
> > to get the system working (sort of) again, you could try to
> > for d in /dev/mapper/* ; do
> >        [[ $d == control ]] && continue
> >        dmsetup resume $d &
> >                       # ^^^ important! background it!
> > done
> >
> > background it, because if you "resume" some target that depends on some
> > other target in suspended state, it will hang and wait for that other
> > target to be resumed... doh.
> >
> > worked for me... (well, to get the system back, at least).
> >
> > see also dmsetup ls, dmsetup info, dmsetp table etc.
> >
> > cheers,
> >
> > --
> > : Lars Ellenberg                                  Tel +43-1-8178292-0  :
> > : LINBIT Information Technologies GmbH            Fax +43-1-8178292-82 :
> > : Schoenbrunner Str. 244, A-1120 Vienna/Europe   http://www.linbit.com :
> >
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm@redhat.com
> > https://www.redhat.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
> >
>

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] new process dead after create multiple snapshot volumes
  2005-09-17  6:27     ` Bear Wolf
@ 2005-09-17  8:23       ` Bear Wolf
  2005-09-17  8:31         ` Bear Wolf
  2005-09-17 19:16       ` Lars Ellenberg
  1 sibling, 1 reply; 8+ messages in thread
From: Bear Wolf @ 2005-09-17  8:23 UTC (permalink / raw)
  To: LVM general discussion and development

here's the verbose log of successful and failed after created snapshot volumes 

verbose log of successful after created snapshot volumes 
*************************************************************************
config/config.c:778   log/activation not found in config: defaulting to 0
commands/toolcontext.c:146   Logging initialised at Sun Sep 18 00:12:57 2005

config/config.c:773   Setting global/umask to 63
commands/toolcontext.c:165   Set umask to 0077
config/config.c:758   Setting devices/dir to /dev
config/config.c:758   Setting global/proc to /proc
config/config.c:773   Setting global/activation to 1
config/config.c:778   global/suffix not found in config: defaulting to 1
config/config.c:764   global/units not found in config: defaulting to h
regex/matcher.c:267   Matcher built with 5 dfa states
config/config.c:758   Setting devices/cache to /etc/lvm/.cache
config/config.c:773   Setting devices/write_cache_state to 1
device/dev-io.c:425   Opened /etc/lvm/.cache RO
device/dev-io.c:456   Closed /etc/lvm/.cache
device/dev-cache.c:228   /dev/sda: Added to device cache
filters/filter-persistent.c:127   Loaded persistent filter cache from /etc/lvm/.
cache
config/config.c:773   Setting activation/reserved_stack to 256
config/config.c:773   Setting activation/reserved_memory to 8192
config/config.c:773   Setting activation/process_priority to -18
format1/format1.c:588   Initialised format: lvm1
format_pool/format_pool.c:355   Initialised format: pool
format_text/format-text.c:1706   Initialised format: lvm2
config/config.c:764   global/format not found in config: defaulting to lvm2
striped/striped.c:231   Initialised segtype: striped
zero/zero.c:100   Initialised segtype: zero
error/errseg.c:100   Initialised segtype: error
snapshot/snapshot.c:165   Initialised segtype: snapshot
mirror/mirrored.c:315   Initialised segtype: mirror
config/config.c:773   Setting backup/retain_days to 30
config/config.c:773   Setting backup/retain_min to 10
config/config.c:758   Setting backup/archive_dir to /etc/lvm/archive
config/config.c:758   Setting backup/backup_dir to /etc/lvm/backup
config/config.c:778   global/fallback_to_lvm1 not found in config: defaulting to
 0
lvmcmdline.c:812   Parsing: lvcreate -s -L64 -n s5 /dev/VG01/lv1
lvmcmdline.c:836   Processing: lvcreate -s -L64 -n s5 /dev/VG01/lv1
lvmcmdline.c:839   O_DIRECT will be used
config/config.c:773   Setting global/locking_type to 1
config/config.c:758   Setting global/locking_dir to /var/lock/lvm
locking/locking.c:139   File-based locking enabled.
lvcreate.c:306   Setting chunksize to 16 sectors.
activate/activate.c:302   Getting target version for snapshot
ioctl/libdm-iface.c:1326   dm version   O
ioctl/libdm-iface.c:1326   dm versions   O
activate/activate.c:302   Getting target version for snapshot-origin
ioctl/libdm-iface.c:1326   dm versions   O
config/config.c:773   Setting activation/mirror_region_size to 512
locking/file_locking.c:164   Locking /var/lock/lvm/V_VG01 WB
lvcreate.c:435   Finding volume group "VG01"
device/dev-io.c:425   Opened /dev/sda RW O_DIRECT
device/dev-io.c:134   /dev/sda: block size is 4096 bytes
label/label.c:168   /dev/sda: lvm2 label detected
cache/lvmcache.c:426   lvmcache: /dev/sda now orphaned
cache/lvmcache.c:426   lvmcache: /dev/sda now in VG VG01
label/label.c:168   /dev/sda: lvm2 label detected
label/label.c:168   /dev/sda: lvm2 label detected
config/config.c:758   Setting cow_store to s1
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s2
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s3
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s4
config/config.c:758   Setting origin to lv1
format_text/format-text.c:311   Read VG01 metadata (10) from /dev/sda at 20480 s
ize 2600
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6    146: NULL(0:0)
metadata/lv_manip.c:1153   Creating logical volume s5
metadata/pv_map.c:47   Allowing allocation on /dev/sda start PE 6 length 146
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7    145: NULL(0:0)
format_text/format-text.c:397   Writing VG01 metadata to /dev/sda at 23552 len 2
826
format_text/format-text.c:483   Pre-Committing VG01 metadata (11) to /dev/sda he
ader at 4096
format_text/archiver.c:364   Creating volume group backup "/etc/lvm/backup/VG01"
 (seqno 11).
format_text/format-text.c:661   Writing VG01 metadata to /etc/lvm/backup/.lvm_pr
oNAS_2497_686647911
format_text/format-text.c:705   Committing VG01 metadata (11)
format_text/format-text.c:706   Renaming /etc/lvm/backup/VG01.tmp to /etc/lvm/ba
ckup/VG01
format_text/format-text.c:483   Committing VG01 metadata (11) to /dev/sda header
 at 4096
locking/file_locking.c:245   Locking LV mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEG
pk4nXxhxd75lDLjzMXKs1nD7 (R)
metadata/metadata.c:1158   Finding volume group for uuid mGsdNLkAeP8eWiFjBTybhs3
5PB8xBwsqsGoa5JEGpk4nXxhxd75lDLjzMXKs1nD7
label/label.c:168   /dev/sda: lvm2 label detected
label/label.c:168   /dev/sda: lvm2 label detected
config/config.c:758   Setting cow_store to s1
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s2
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s3
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s4
config/config.c:758   Setting origin to lv1
format_text/format-text.c:311   Read VG01 metadata (11) from /dev/sda at 23552 s
ize 2826
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7    145: NULL(0:0)
metadata/metadata.c:1164   Found volume group "VG01"
config/config.c:758   Setting activation/missing_stripe_filler to /dev/ioerror
activate/dev_manager.c:1048   Getting device info for VG01-s5
ioctl/libdm-iface.c:1326   dm info  mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEGpk4n
Xxhxd75lDLjzMXKs1nD7 N
ioctl/libdm-iface.c:1326   dm info VG01-s5  N
mm/memlock.c:119   Unlocking memory
mm/memlock.c:138   memlock_count dec to 0
activate/fs.c:176   Linking /dev/VG01/s5 -> /dev/mapper/VG01-s5
toollib.c:1087   Zeroing start of logical volume "s5"
device/dev-cache.c:228   /dev/VG01/s5: Added to device cache
device/dev-io.c:425   Opened /dev/VG01/s5 RW O_DIRECT
device/dev-io.c:584   Wiping /dev/VG01/s5 at sector 0 length 8 sectors
device/dev-io.c:134   /dev/VG01/s5: block size is 4096 bytes
device/dev-io.c:456   Closed /dev/VG01/s5
locking/file_locking.c:240   Locking LV mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEG
pk4nXxhxd75lDLjzMXKs1nD7 (NL)
metadata/metadata.c:1158   Finding volume group for uuid mGsdNLkAeP8eWiFjBTybhs3
5PB8xBwsqsGoa5JEGpk4nXxhxd75lDLjzMXKs1nD7
label/label.c:168   /dev/sda: lvm2 label detected
label/label.c:168   /dev/sda: lvm2 label detected
config/config.c:758   Setting cow_store to s1
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s2
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s3
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s4
config/config.c:758   Setting origin to lv1
format_text/format-text.c:311   Read VG01 metadata (11) from /dev/sda at 23552 s
ize 2826
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7    145: NULL(0:0)
metadata/metadata.c:1164   Found volume group "VG01"
activate/dev_manager.c:1048   Getting device info for VG01-s5
ioctl/libdm-iface.c:1326   dm info  mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEGpk4n
Xxhxd75lDLjzMXKs1nD7 O
mm/memlock.c:119   Unlocking memory
mm/memlock.c:138   memlock_count dec to 0
activate/fs.c:211   Removing link /dev/VG01/s5
locking/file_locking.c:235   Unlocking LV mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5J
EGpk4nXxhxd75lDLjzMXKs1nD7
metadata/metadata.c:1158   Finding volume group for uuid mGsdNLkAeP8eWiFjBTybhs3
5PB8xBwsqsGoa5JEGpk4nXxhxd75lDLjzMXKs1nD7
label/label.c:168   /dev/sda: lvm2 label detected
label/label.c:168   /dev/sda: lvm2 label detected
config/config.c:758   Setting cow_store to s1
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s2
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s3
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s4
config/config.c:758   Setting origin to lv1
format_text/format-text.c:311   Read VG01 metadata (11) from /dev/sda at 23552 s
ize 2826
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7    145: NULL(0:0)
metadata/metadata.c:1164   Found volume group "VG01"
activate/dev_manager.c:1048   Getting device info for VG01-s5
ioctl/libdm-iface.c:1326   dm info  mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEGpk4n
Xxhxd75lDLjzMXKs1nD7 N
ioctl/libdm-iface.c:1326   dm info VG01-s5  N
locking/file_locking.c:250   Locking LV mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qi
e6tyA0ztVEJcQvJi9CvcngrT (W)
metadata/metadata.c:1158   Finding volume group for uuid mGsdNLkAeP8eWiFjBTybhs3
5PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT
label/label.c:168   /dev/sda: lvm2 label detected
label/label.c:168   /dev/sda: lvm2 label detected
config/config.c:758   Setting cow_store to s1
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s2
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s3
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s4
config/config.c:758   Setting origin to lv1
format_text/format-text.c:311   Read VG01 metadata (11) from /dev/sda at 23552 s
ize 2826
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7    145: NULL(0:0)
metadata/metadata.c:1164   Found volume group "VG01"
activate/dev_manager.c:1048   Getting device info for VG01-lv1
ioctl/libdm-iface.c:1326   dm info  mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6ty
A0ztVEJcQvJi9CvcngrT N
mm/memlock.c:119   Unlocking memory
mm/memlock.c:138   memlock_count dec to 0
activate/fs.c:169   Removing /dev/VG01/s3
activate/fs.c:176   Linking /dev/VG01/s3 -> /dev/mapper/VG01-s3
activate/fs.c:176   Linking /dev/VG01/s5 -> /dev/mapper/VG01-s5
activate/fs.c:169   Removing /dev/VG01/s1
activate/fs.c:176   Linking /dev/VG01/s1 -> /dev/mapper/VG01-s1
activate/fs.c:169   Removing /dev/VG01/s4
activate/fs.c:176   Linking /dev/VG01/s4 -> /dev/mapper/VG01-s4
activate/fs.c:169   Removing /dev/VG01/s2
activate/fs.c:176   Linking /dev/VG01/s2 -> /dev/mapper/VG01-s2
activate/fs.c:169   Removing /dev/VG01/lv1
activate/fs.c:176   Linking /dev/VG01/lv1 -> /dev/mapper/VG01-lv1
format_text/archiver.c:364   Creating volume group backup "/etc/lvm/backup/VG01"
 (seqno 12).
format_text/format-text.c:661   Writing VG01 metadata to /etc/lvm/backup/.lvm_pr
oNAS_2497_1510734533
format_text/format-text.c:705   Committing VG01 metadata (12)
format_text/format-text.c:706   Renaming /etc/lvm/backup/VG01.tmp to /etc/lvm/ba
ckup/VG01
lvcreate.c:783   Logical volume "s5" created
locking/file_locking.c:59   Unlocking /var/lock/lvm/V_VG01
device/dev-io.c:456   Closed /dev/sda
filters/filter-persistent.c:181   Dumping persistent device cache to /etc/lvm/.c
ache
cache/lvmcache.c:574   Wiping internal VG cache

here is the verbose log of create snapshot volume but hang
**************************************************************************
config/config.c:778   log/activation not found in config: defaulting to 0
commands/toolcontext.c:146   Logging initialised at Sun Sep 18 00:13:12 2005

config/config.c:773   Setting global/umask to 63
commands/toolcontext.c:165   Set umask to 0077
config/config.c:758   Setting devices/dir to /dev
config/config.c:758   Setting global/proc to /proc
config/config.c:773   Setting global/activation to 1
config/config.c:778   global/suffix not found in config: defaulting to 1
config/config.c:764   global/units not found in config: defaulting to h
regex/matcher.c:267   Matcher built with 5 dfa states
config/config.c:758   Setting devices/cache to /etc/lvm/.cache
config/config.c:773   Setting devices/write_cache_state to 1
device/dev-io.c:425   Opened /etc/lvm/.cache RO
device/dev-io.c:456   Closed /etc/lvm/.cache
device/dev-cache.c:228   /dev/sda: Added to device cache
filters/filter-persistent.c:127   Loaded persistent filter cache from /etc/lvm/.
cache
config/config.c:773   Setting activation/reserved_stack to 256
config/config.c:773   Setting activation/reserved_memory to 8192
config/config.c:773   Setting activation/process_priority to -18
format1/format1.c:588   Initialised format: lvm1
format_pool/format_pool.c:355   Initialised format: pool
format_text/format-text.c:1706   Initialised format: lvm2
config/config.c:764   global/format not found in config: defaulting to lvm2
striped/striped.c:231   Initialised segtype: striped
zero/zero.c:100   Initialised segtype: zero
error/errseg.c:100   Initialised segtype: error
snapshot/snapshot.c:165   Initialised segtype: snapshot
mirror/mirrored.c:315   Initialised segtype: mirror
config/config.c:773   Setting backup/retain_days to 30
config/config.c:773   Setting backup/retain_min to 10
config/config.c:758   Setting backup/archive_dir to /etc/lvm/archive
config/config.c:758   Setting backup/backup_dir to /etc/lvm/backup
config/config.c:778   global/fallback_to_lvm1 not found in config: defaulting to
 0
lvmcmdline.c:812   Parsing: lvcreate -s -L64 -n s6 /dev/VG01/lv1
lvmcmdline.c:836   Processing: lvcreate -s -L64 -n s6 /dev/VG01/lv1
lvmcmdline.c:839   O_DIRECT will be used
config/config.c:773   Setting global/locking_type to 1
config/config.c:758   Setting global/locking_dir to /var/lock/lvm
locking/locking.c:139   File-based locking enabled.
lvcreate.c:306   Setting chunksize to 16 sectors.
activate/activate.c:302   Getting target version for snapshot
ioctl/libdm-iface.c:1326   dm version   O
ioctl/libdm-iface.c:1326   dm versions   O
activate/activate.c:302   Getting target version for snapshot-origin
ioctl/libdm-iface.c:1326   dm versions   O
config/config.c:773   Setting activation/mirror_region_size to 512
locking/file_locking.c:164   Locking /var/lock/lvm/V_VG01 WB
lvcreate.c:435   Finding volume group "VG01"
device/dev-io.c:425   Opened /dev/sda RW O_DIRECT
device/dev-io.c:134   /dev/sda: block size is 4096 bytes
label/label.c:168   /dev/sda: lvm2 label detected
cache/lvmcache.c:426   lvmcache: /dev/sda now orphaned
cache/lvmcache.c:426   lvmcache: /dev/sda now in VG VG01
label/label.c:168   /dev/sda: lvm2 label detected
label/label.c:168   /dev/sda: lvm2 label detected
config/config.c:758   Setting cow_store to s1
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s2
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s3
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s4
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s5
config/config.c:758   Setting origin to lv1
format_text/format-text.c:311   Read VG01 metadata (12) from /dev/sda at 26624 s
ize 3047
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7    145: NULL(0:0)
metadata/lv_manip.c:1153   Creating logical volume s6
metadata/pv_map.c:47   Allowing allocation on /dev/sda start PE 7 length 145
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7      1: s6(0:0)
metadata/pv_manip.c:242   /dev/sda 7:      8    144: NULL(0:0)
format_text/format-text.c:397   Writing VG01 metadata to /dev/sda at 29696 len 3
273
format_text/format-text.c:483   Pre-Committing VG01 metadata (13) to /dev/sda he
ader at 4096
format_text/archiver.c:364   Creating volume group backup "/etc/lvm/backup/VG01"
 (seqno 13).
format_text/format-text.c:661   Writing VG01 metadata to /etc/lvm/backup/.lvm_pr
oNAS_2516_4686790
format_text/format-text.c:705   Committing VG01 metadata (13)
format_text/format-text.c:706   Renaming /etc/lvm/backup/VG01.tmp to /etc/lvm/ba
ckup/VG01
format_text/format-text.c:483   Committing VG01 metadata (13) to /dev/sda header
 at 4096
locking/file_locking.c:245   Locking LV mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZ
K7A5JOgpUBnciRrm1UQPLpjP (R)
metadata/metadata.c:1158   Finding volume group for uuid mGsdNLkAeP8eWiFjBTybhs3
5PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP
label/label.c:168   /dev/sda: lvm2 label detected
label/label.c:168   /dev/sda: lvm2 label detected
config/config.c:758   Setting cow_store to s1
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s2
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s3
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s4
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s5
config/config.c:758   Setting origin to lv1
format_text/format-text.c:311   Read VG01 metadata (13) from /dev/sda at 29696 s
ize 3273
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7      1: s6(0:0)
metadata/pv_manip.c:242   /dev/sda 7:      8    144: NULL(0:0)
metadata/metadata.c:1164   Found volume group "VG01"
config/config.c:758   Setting activation/missing_stripe_filler to /dev/ioerror
activate/dev_manager.c:1048   Getting device info for VG01-s6
ioctl/libdm-iface.c:1326   dm info  mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5
JOgpUBnciRrm1UQPLpjP N
ioctl/libdm-iface.c:1326   dm info VG01-s6  N
mm/memlock.c:119   Unlocking memory
mm/memlock.c:138   memlock_count dec to 0
activate/fs.c:176   Linking /dev/VG01/s6 -> /dev/mapper/VG01-s6
toollib.c:1087   Zeroing start of logical volume "s6"
device/dev-cache.c:228   /dev/VG01/s6: Added to device cache
device/dev-io.c:425   Opened /dev/VG01/s6 RW O_DIRECT
device/dev-io.c:584   Wiping /dev/VG01/s6 at sector 0 length 8 sectors
device/dev-io.c:134   /dev/VG01/s6: block size is 4096 bytes
device/dev-io.c:456   Closed /dev/VG01/s6
locking/file_locking.c:240   Locking LV mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZ
K7A5JOgpUBnciRrm1UQPLpjP (NL)
metadata/metadata.c:1158   Finding volume group for uuid mGsdNLkAeP8eWiFjBTybhs3
5PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP
label/label.c:168   /dev/sda: lvm2 label detected
label/label.c:168   /dev/sda: lvm2 label detected
config/config.c:758   Setting cow_store to s1
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s2
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s3
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s4
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s5
config/config.c:758   Setting origin to lv1
format_text/format-text.c:311   Read VG01 metadata (13) from /dev/sda at 29696 s
ize 3273
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7      1: s6(0:0)
metadata/pv_manip.c:242   /dev/sda 7:      8    144: NULL(0:0)
metadata/metadata.c:1164   Found volume group "VG01"
activate/dev_manager.c:1048   Getting device info for VG01-s6
ioctl/libdm-iface.c:1326   dm info  mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5
JOgpUBnciRrm1UQPLpjP O
mm/memlock.c:119   Unlocking memory
mm/memlock.c:138   memlock_count dec to 0
activate/fs.c:211   Removing link /dev/VG01/s6
locking/file_locking.c:235   Unlocking LV mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnU
RZK7A5JOgpUBnciRrm1UQPLpjP
metadata/metadata.c:1158   Finding volume group for uuid mGsdNLkAeP8eWiFjBTybhs3
5PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP
label/label.c:168   /dev/sda: lvm2 label detected
label/label.c:168   /dev/sda: lvm2 label detected
config/config.c:758   Setting cow_store to s1
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s2
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s3
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s4
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s5
config/config.c:758   Setting origin to lv1
format_text/format-text.c:311   Read VG01 metadata (13) from /dev/sda at 29696 s
ize 3273
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7      1: s6(0:0)
metadata/pv_manip.c:242   /dev/sda 7:      8    144: NULL(0:0)
metadata/metadata.c:1164   Found volume group "VG01"
activate/dev_manager.c:1048   Getting device info for VG01-s6
ioctl/libdm-iface.c:1326   dm info  mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5
JOgpUBnciRrm1UQPLpjP N
ioctl/libdm-iface.c:1326   dm info VG01-s6  N
locking/file_locking.c:250   Locking LV mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qi
e6tyA0ztVEJcQvJi9CvcngrT (W)
metadata/metadata.c:1158   Finding volume group for uuid mGsdNLkAeP8eWiFjBTybhs3
5PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT
label/label.c:168   /dev/sda: lvm2 label detected
label/label.c:168   /dev/sda: lvm2 label detected
config/config.c:758   Setting cow_store to s1
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s2
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s3
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s4
config/config.c:758   Setting origin to lv1
config/config.c:758   Setting cow_store to s5
config/config.c:758   Setting origin to lv1
format_text/format-text.c:311   Read VG01 metadata (13) from /dev/sda at 29696 s
ize 3273
metadata/pv_manip.c:242   /dev/sda 0:      0      2: lv1(0:0)
metadata/pv_manip.c:242   /dev/sda 1:      2      1: s1(0:0)
metadata/pv_manip.c:242   /dev/sda 2:      3      1: s2(0:0)
metadata/pv_manip.c:242   /dev/sda 3:      4      1: s3(0:0)
metadata/pv_manip.c:242   /dev/sda 4:      5      1: s4(0:0)
metadata/pv_manip.c:242   /dev/sda 5:      6      1: s5(0:0)
metadata/pv_manip.c:242   /dev/sda 6:      7      1: s6(0:0)
metadata/pv_manip.c:242   /dev/sda 7:      8    144: NULL(0:0)
metadata/metadata.c:1164   Found volume group "VG01"
activate/dev_manager.c:1048   Getting device info for VG01-lv1
ioctl/libdm-iface.c:1326   dm info  mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6ty
A0ztVEJcQvJi9CvcngrT N

hand when get device mapper info ID,
and no Unlocking memory log found.....

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] new process dead after create multiple snapshot volumes
  2005-09-17  8:23       ` Bear Wolf
@ 2005-09-17  8:31         ` Bear Wolf
  0 siblings, 0 replies; 8+ messages in thread
From: Bear Wolf @ 2005-09-17  8:31 UTC (permalink / raw)
  To: LVM general discussion and development

verbose log from console when created snapshot then process hang.
lvcreate -s -L64 -n s6 /dev/VG01/lv1

*************************************
.............
      Suspending VG01-s3-cow
        dm suspend VG01-s3-cow  N
      Suspending VG01-s1
        dm suspend VG01-s1  N
      Suspending VG01-s4
        dm suspend VG01-s4  N
      Suspending VG01-s2
        dm suspend VG01-s2  N
      Suspending VG01-lv1-real
        dm suspend VG01-lv1-real  N
      Suspending VG01-s1-cow
        dm suspend VG01-s1-cow  N
      Suspending VG01-s4-cow
        dm suspend VG01-s4-cow  N
      Suspending VG01-s2-cow
        dm suspend VG01-s2-cow  N
        /dev/sda 0:      0      2: lv1(0:0)
        /dev/sda 1:      2      1: s1(0:0)
        /dev/sda 2:      3      1: s2(0:0)
        /dev/sda 3:      4      1: s3(0:0)
        /dev/sda 4:      5      1: s4(0:0)
        /dev/sda 5:      6      1: s5(0:0)
        /dev/sda 6:      7    145: NULL(0:0)
        Writing VG01 metadata to /dev/sda at 26624 len 3047
        Pre-Committing VG01 metadata (12) to /dev/sda header at 4096
        Committing VG01 metadata (12) to /dev/sda header at 4096
        Unlocking LV
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT
      Finding volume group for uuid
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT
      /dev/sda: lvm2 label detected
      /dev/sda: lvm2 label detected
        Read VG01 metadata (12) from /dev/sda at 26624 size 3047
        /dev/sda 0:      0      2: lv1(0:0)
        /dev/sda 1:      2      1: s1(0:0)
        /dev/sda 2:      3      1: s2(0:0)
        /dev/sda 3:      4      1: s3(0:0)
        /dev/sda 4:      5      1: s4(0:0)
        /dev/sda 5:      6      1: s5(0:0)
        /dev/sda 6:      7    145: NULL(0:0)
    Found volume group "VG01"
        Getting device info for VG01-lv1
        dm info 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT N
        dm names   O
        Found existing layer 'VG01-s2-cow'
        Getting device info for VG01-s2-cow
        dm info VG01-s2-cow  N
        Found existing layer 'VG01-s3-cow'
        Getting device info for VG01-s3-cow
        dm info VG01-s3-cow  N
        Found existing layer 'VG01-s4'
        Getting device info for VG01-s4
        dm info VG01-s4  N
        Found existing layer 'VG01-s3'
        Getting device info for VG01-s3
        dm info VG01-s3  N
        Found existing layer 'VG01-lv1-real'
        Getting device info for VG01-lv1-real
        dm info VG01-lv1-real  N
        Found existing layer 'VG01-lv1'
        Getting device info for VG01-lv1
        dm info VG01-lv1  N
        Found existing layer 'VG01-s4-cow'
        Getting device info for VG01-s4-cow
        dm info VG01-s4-cow  N
        Found existing layer 'VG01-s2'
        Getting device info for VG01-s2
        dm info VG01-s2  N
        Found existing layer 'VG01-s1'
        Getting device info for VG01-s1
        dm info VG01-s1  N
        Found existing layer 'VG01-s1-cow'
        Getting device info for VG01-s1-cow
        dm info VG01-s1-cow  N
        Found active lv lv1 (suspended)
        Found active lv s1 (suspended)
        Found active lv s2 (suspended)
        Found active lv s3 (suspended)
        Found active lv s4 (suspended)
        Getting device info for VG01-s5-cow
        dm info 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEGpk4nXxhxd75lDLjzMXKs1nD7-cow N
        dm info VG01-s5-cow  N
        Getting device info for VG01-s5
        dm info 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEGpk4nXxhxd75lDLjzMXKs1nD7 N
        dm info VG01-s5  N
    Loading VG01-s3-cow
        Adding target: 0 131072 linear /dev/sda 525440
        dm reload 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsq0pE5C9lW88MYp9h2NH27bpf49N0DB2lA-cow N
      Activated VG01-s3-cow
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsq0pE5C9lW88MYp9h2NH27bpf49N0DB2lA-cow
253:006
    Loading VG01-lv1-real
        Adding target: 0 262144 linear /dev/sda 1152
        dm reload 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT-real
N
      Resuming VG01-lv1-real
        dm resume VG01-lv1-real  N
      Activated VG01-lv1-real
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT-real
253:001
    Loading VG01-s3
        Adding target: 0 262144 snapshot 253:001 253:006 P 16
        dm reload 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsq0pE5C9lW88MYp9h2NH27bpf49N0DB2lA N
      Activated VG01-s3
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsq0pE5C9lW88MYp9h2NH27bpf49N0DB2lA
253:007
    Loading VG01-s5-cow
        Adding target: 0 131072 linear /dev/sda 787584
        dm create VG01-s5-cow
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEGpk4nXxhxd75lDLjzMXKs1nD7-cow O
        dm reload VG01-s5-cow  O
        dm resume VG01-s5-cow  N
      Activated VG01-s5-cow
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEGpk4nXxhxd75lDLjzMXKs1nD7-cow
253:010
    Loading VG01-s5
        Adding target: 0 262144 snapshot 253:001 253:010 P 16
        dm create VG01-s5
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEGpk4nXxhxd75lDLjzMXKs1nD7 O
        dm reload VG01-s5  O
        dm resume VG01-s5  N
      Activated VG01-s5
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqsGoa5JEGpk4nXxhxd75lDLjzMXKs1nD7
253:011
    Loading VG01-s1-cow
        Adding target: 0 131072 linear /dev/sda 263296
        dm reload 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqU8iY0rdEugG8mBkjL0p24O2XxuG67fCC-cow N
      Activated VG01-s1-cow
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqU8iY0rdEugG8mBkjL0p24O2XxuG67fCC-cow
253:002
    Loading VG01-s1
        Adding target: 0 262144 snapshot 253:001 253:002 P 16
        dm reload 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqU8iY0rdEugG8mBkjL0p24O2XxuG67fCC N
      Activated VG01-s1
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqU8iY0rdEugG8mBkjL0p24O2XxuG67fCC
253:003
    Loading VG01-s4-cow
        Adding target: 0 131072 linear /dev/sda 656512
        dm reload 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqpkUBhz1E4jcl9ljQOayfUUwZY0nF3u8M-cow N
      Activated VG01-s4-cow
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqpkUBhz1E4jcl9ljQOayfUUwZY0nF3u8M-cow
253:008
    Loading VG01-s4
        Adding target: 0 262144 snapshot 253:001 253:008 P 16
        dm reload 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqpkUBhz1E4jcl9ljQOayfUUwZY0nF3u8M N
      Activated VG01-s4
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqpkUBhz1E4jcl9ljQOayfUUwZY0nF3u8M
253:009
    Loading VG01-s2-cow
        Adding target: 0 131072 linear /dev/sda 394368
        dm reload 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsq3IM2X651mCRcEXfTqa7AkNJsKv1skiBu-cow N
      Activated VG01-s2-cow
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsq3IM2X651mCRcEXfTqa7AkNJsKv1skiBu-cow
253:004
    Loading VG01-s2
        Adding target: 0 262144 snapshot 253:001 253:004 P 16
        dm reload 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsq3IM2X651mCRcEXfTqa7AkNJsKv1skiBu N
      Activated VG01-s2
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsq3IM2X651mCRcEXfTqa7AkNJsKv1skiBu
253:005
    Loading VG01-lv1
        Adding target: 0 262144 snapshot-origin 253:001
        dm reload 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT N
      Activated VG01-lv1
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT
253:000
      Resuming VG01-s3-cow
        dm resume VG01-s3-cow  N
      Resuming VG01-s3
        dm resume VG01-s3  N
      Resuming VG01-s2-cow
        dm resume VG01-s2-cow  N
      Resuming VG01-s1-cow
        dm resume VG01-s1-cow  N
      Resuming VG01-s1
        dm resume VG01-s1  N
      Resuming VG01-s4-cow
        dm resume VG01-s4-cow  N
      Resuming VG01-s4
        dm resume VG01-s4  N
      Resuming VG01-s2
        dm resume VG01-s2  N
      Resuming VG01-lv1
        dm resume VG01-lv1  N
      Unlocking memory
        memlock_count dec to 0
      Removing /dev/VG01/s3
      Linking /dev/VG01/s3 -> /dev/mapper/VG01-s3
      Linking /dev/VG01/s5 -> /dev/mapper/VG01-s5
      Removing /dev/VG01/s1
      Linking /dev/VG01/s1 -> /dev/mapper/VG01-s1
      Removing /dev/VG01/s4
      Linking /dev/VG01/s4 -> /dev/mapper/VG01-s4
      Removing /dev/VG01/s2
      Linking /dev/VG01/s2 -> /dev/mapper/VG01-s2
      Removing /dev/VG01/lv1
      Linking /dev/VG01/lv1 -> /dev/mapper/VG01-lv1
    Creating volume group backup "/etc/lvm/backup/VG01" (seqno 12).
        Writing VG01 metadata to /etc/lvm/backup/.lvm_proNAS_2497_1510734533
        Committing VG01 metadata (12)
        Renaming /etc/lvm/backup/VG01.tmp to /etc/lvm/backup/VG01
  Logical volume "s5" created
      Unlocking /var/lock/lvm/V_VG01
        Closed /dev/sda
      Dumping persistent device cache to /etc/lvm/.cache
    Wiping internal VG cache
-bash-3.00# cp -af /etc/ /mnt/lv1/etc6
-bash-3.00# lvcreate -s -L64 -n s6 /dev/VG01/lv1
      Setting log/indent to 1
      Setting log/prefix to
      Setting log/command_names to 0
      Setting global/test to 0
      Setting log/overwrite to 1
      Setting log/file to /var/log/lvm2.log
      log/activation not found in config: defaulting to 0
    Logging initialised at Sun Sep 18 00:13:12 2005

      Setting global/umask to 63
    Set umask to 0077
      Setting devices/dir to /dev
      Setting global/proc to /proc
      Setting global/activation to 1
      global/suffix not found in config: defaulting to 1
      global/units not found in config: defaulting to h
        Matcher built with 5 dfa states
      Setting devices/cache to /etc/lvm/.cache
      Setting devices/write_cache_state to 1
        Opened /etc/lvm/.cache RO
        Closed /etc/lvm/.cache
        /dev/sda: Added to device cache
      Loaded persistent filter cache from /etc/lvm/.cache
      Setting activation/reserved_stack to 256
      Setting activation/reserved_memory to 8192
      Setting activation/process_priority to -18
      Initialised format: lvm1
      Initialised format: pool
      Initialised format: lvm2
      global/format not found in config: defaulting to lvm2
      Initialised segtype: striped
      Initialised segtype: zero
      Initialised segtype: error
      Initialised segtype: snapshot
      Initialised segtype: mirror
      Setting backup/retain_days to 30
      Setting backup/retain_min to 10
      Setting backup/archive_dir to /etc/lvm/archive
      Setting backup/backup_dir to /etc/lvm/backup
      global/fallback_to_lvm1 not found in config: defaulting to 0
        Parsing: lvcreate -s -L64 -n s6 /dev/VG01/lv1
        Processing: lvcreate -s -L64 -n s6 /dev/VG01/lv1
        O_DIRECT will be used
      Setting global/locking_type to 1
      Setting global/locking_dir to /var/lock/lvm
      File-based locking enabled.
    Setting chunksize to 16 sectors.
      Getting target version for snapshot
        dm version   O
        dm versions   O
      Getting target version for snapshot-origin
        dm versions   O
      Setting activation/mirror_region_size to 512
      Locking /var/lock/lvm/V_VG01 WB
    Finding volume group "VG01"
        Opened /dev/sda RW O_DIRECT
        /dev/sda: block size is 4096 bytes
      /dev/sda: lvm2 label detected
        lvmcache: /dev/sda now orphaned
        lvmcache: /dev/sda now in VG VG01
      /dev/sda: lvm2 label detected
      /dev/sda: lvm2 label detected
        Read VG01 metadata (12) from /dev/sda at 26624 size 3047
        /dev/sda 0:      0      2: lv1(0:0)
        /dev/sda 1:      2      1: s1(0:0)
        /dev/sda 2:      3      1: s2(0:0)
        /dev/sda 3:      4      1: s3(0:0)
        /dev/sda 4:      5      1: s4(0:0)
        /dev/sda 5:      6      1: s5(0:0)
        /dev/sda 6:      7    145: NULL(0:0)
    Creating logical volume s6
        Allowing allocation on /dev/sda start PE 7 length 145
        /dev/sda 0:      0      2: lv1(0:0)
        /dev/sda 1:      2      1: s1(0:0)
        /dev/sda 2:      3      1: s2(0:0)
        /dev/sda 3:      4      1: s3(0:0)
        /dev/sda 4:      5      1: s4(0:0)
        /dev/sda 5:      6      1: s5(0:0)
        /dev/sda 6:      7      1: s6(0:0)
        /dev/sda 7:      8    144: NULL(0:0)
        Writing VG01 metadata to /dev/sda at 29696 len 3273
        Pre-Committing VG01 metadata (13) to /dev/sda header at 4096
    Creating volume group backup "/etc/lvm/backup/VG01" (seqno 13).
        Writing VG01 metadata to /etc/lvm/backup/.lvm_proNAS_2516_4686790
        Committing VG01 metadata (13)
        Renaming /etc/lvm/backup/VG01.tmp to /etc/lvm/backup/VG01
        Committing VG01 metadata (13) to /dev/sda header at 4096
        Locking LV
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP (R)
      Finding volume group for uuid
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP
      /dev/sda: lvm2 label detected
      /dev/sda: lvm2 label detected
        Read VG01 metadata (13) from /dev/sda at 29696 size 3273
        /dev/sda 0:      0      2: lv1(0:0)
        /dev/sda 1:      2      1: s1(0:0)
        /dev/sda 2:      3      1: s2(0:0)
        /dev/sda 3:      4      1: s3(0:0)
        /dev/sda 4:      5      1: s4(0:0)
        /dev/sda 5:      6      1: s5(0:0)
        /dev/sda 6:      7      1: s6(0:0)
        /dev/sda 7:      8    144: NULL(0:0)
    Found volume group "VG01"
      Setting activation/missing_stripe_filler to /dev/ioerror
        Getting device info for VG01-s6
        dm info 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP N
        dm info VG01-s6  N
      Locking memory
        memlock_count inc to 1
        dm names   O
        Found existing layer 'VG01-s2-cow'
        Getting device info for VG01-s2-cow
        dm info VG01-s2-cow  N
        Found existing layer 'VG01-s5'
        Getting device info for VG01-s5
        dm info VG01-s5  N
        Found existing layer 'VG01-s3-cow'
        Getting device info for VG01-s3-cow
        dm info VG01-s3-cow  N
        Found existing layer 'VG01-s4'
        Getting device info for VG01-s4
        dm info VG01-s4  N
        Found existing layer 'VG01-s3'
        Getting device info for VG01-s3
        dm info VG01-s3  N
        Found existing layer 'VG01-lv1-real'
        Getting device info for VG01-lv1-real
        dm info VG01-lv1-real  N
        Found existing layer 'VG01-lv1'
        Getting device info for VG01-lv1
        dm info VG01-lv1  N
        Found existing layer 'VG01-s4-cow'
        Getting device info for VG01-s4-cow
        dm info VG01-s4-cow  N
        Found existing layer 'VG01-s2'
        Getting device info for VG01-s2
        dm info VG01-s2  N
        Found existing layer 'VG01-s1'
        Getting device info for VG01-s1
        dm info VG01-s1  N
        Found existing layer 'VG01-s5-cow'
        Getting device info for VG01-s5-cow
        dm info VG01-s5-cow  N
        Found existing layer 'VG01-s1-cow'
        Getting device info for VG01-s1-cow
        dm info VG01-s1-cow  N
        Found active lv lv1
        Found active lv s1
        Found active lv s2
        Found active lv s3
        Found active lv s4
        Found active lv s5
        Getting device info for VG01-s6
        dm info 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP N
        dm info VG01-s6  N
    Loading VG01-s6
        Adding target: 0 131072 linear /dev/sda 918656
        dm create VG01-s6
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP O
        dm reload VG01-s6  O
        dm resume VG01-s6  N
      Activated VG01-s6
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP
253:012
      Unlocking memory
        memlock_count dec to 0
      Linking /dev/VG01/s6 -> /dev/mapper/VG01-s6
    Zeroing start of logical volume "s6"
        /dev/VG01/s6: Added to device cache
        Opened /dev/VG01/s6 RW O_DIRECT
        Wiping /dev/VG01/s6 at sector 0 length 8 sectors
        /dev/VG01/s6: block size is 4096 bytes
        Closed /dev/VG01/s6
        Locking LV
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP (NL)
      Finding volume group for uuid
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP
      /dev/sda: lvm2 label detected
      /dev/sda: lvm2 label detected
        Read VG01 metadata (13) from /dev/sda at 29696 size 3273
        /dev/sda 0:      0      2: lv1(0:0)
        /dev/sda 1:      2      1: s1(0:0)
        /dev/sda 2:      3      1: s2(0:0)
        /dev/sda 3:      4      1: s3(0:0)
        /dev/sda 4:      5      1: s4(0:0)
        /dev/sda 5:      6      1: s5(0:0)
        /dev/sda 6:      7      1: s6(0:0)
        /dev/sda 7:      8    144: NULL(0:0)
    Found volume group "VG01"
        Getting device info for VG01-s6
        dm info 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP O
      Locking memory
        memlock_count inc to 1
        dm names   O
        Found existing layer 'VG01-s2-cow'
        Getting device info for VG01-s2-cow
        dm info VG01-s2-cow  N
        Found existing layer 'VG01-s6'
        Getting device info for VG01-s6
        dm info VG01-s6  N
        Found existing layer 'VG01-s5'
        Getting device info for VG01-s5
        dm info VG01-s5  N
        Found existing layer 'VG01-s3-cow'
        Getting device info for VG01-s3-cow
        dm info VG01-s3-cow  N
        Found existing layer 'VG01-s4'
        Getting device info for VG01-s4
        dm info VG01-s4  N
        Found existing layer 'VG01-s3'
        Getting device info for VG01-s3
        dm info VG01-s3  N
        Found existing layer 'VG01-lv1-real'
        Getting device info for VG01-lv1-real
        dm info VG01-lv1-real  N
        Found existing layer 'VG01-lv1'
        Getting device info for VG01-lv1
        dm info VG01-lv1  N
        Found existing layer 'VG01-s4-cow'
        Getting device info for VG01-s4-cow
        dm info VG01-s4-cow  N
        Found existing layer 'VG01-s2'
        Getting device info for VG01-s2
        dm info VG01-s2  N
        Found existing layer 'VG01-s1'
        Getting device info for VG01-s1
        dm info VG01-s1  N
        Found existing layer 'VG01-s5-cow'
        Getting device info for VG01-s5-cow
        dm info VG01-s5-cow  N
        Found existing layer 'VG01-s1-cow'
        Getting device info for VG01-s1-cow
        dm info VG01-s1-cow  N
        Found active lv lv1
        Found active lv s6
        Found active lv s1
        Found active lv s2
        Found active lv s3
        Found active lv s4
        Found active lv s5
    Removing VG01-s6
      Unlocking memory
        memlock_count dec to 0
      Removing link /dev/VG01/s6
        Unlocking LV
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP
      Finding volume group for uuid
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP
      /dev/sda: lvm2 label detected
      /dev/sda: lvm2 label detected
        Read VG01 metadata (13) from /dev/sda at 29696 size 3273
        /dev/sda 0:      0      2: lv1(0:0)
        /dev/sda 1:      2      1: s1(0:0)
        /dev/sda 2:      3      1: s2(0:0)
        /dev/sda 3:      4      1: s3(0:0)
        /dev/sda 4:      5      1: s4(0:0)
        /dev/sda 5:      6      1: s5(0:0)
        /dev/sda 6:      7      1: s6(0:0)
        /dev/sda 7:      8    144: NULL(0:0)
    Found volume group "VG01"
        Getting device info for VG01-s6
        dm info 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP N
        dm info VG01-s6  N
        Locking LV
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT (W)
      Finding volume group for uuid
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT
      /dev/sda: lvm2 label detected
      /dev/sda: lvm2 label detected
        Read VG01 metadata (13) from /dev/sda at 29696 size 3273
        /dev/sda 0:      0      2: lv1(0:0)
        /dev/sda 1:      2      1: s1(0:0)
        /dev/sda 2:      3      1: s2(0:0)
        /dev/sda 3:      4      1: s3(0:0)
        /dev/sda 4:      5      1: s4(0:0)
        /dev/sda 5:      6      1: s5(0:0)
        /dev/sda 6:      7      1: s6(0:0)
        /dev/sda 7:      8    144: NULL(0:0)
    Found volume group "VG01"
        Getting device info for VG01-lv1
        dm info 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqmUxJX5Qie6tyA0ztVEJcQvJi9CvcngrT N
      Locking memory
        memlock_count inc to 1
        dm names   O
        Found existing layer 'VG01-s2-cow'
        Getting device info for VG01-s2-cow
        dm info VG01-s2-cow  N
        Found existing layer 'VG01-s5'
        Getting device info for VG01-s5
        dm info VG01-s5  N
        Found existing layer 'VG01-s3-cow'
        Getting device info for VG01-s3-cow
        dm info VG01-s3-cow  N
        Found existing layer 'VG01-s4'
        Getting device info for VG01-s4
        dm info VG01-s4  N
        Found existing layer 'VG01-s3'
        Getting device info for VG01-s3
        dm info VG01-s3  N
        Found existing layer 'VG01-lv1-real'
        Getting device info for VG01-lv1-real
        dm info VG01-lv1-real  N
        Found existing layer 'VG01-lv1'
        Getting device info for VG01-lv1
        dm info VG01-lv1  N
        Found existing layer 'VG01-s4-cow'
        Getting device info for VG01-s4-cow
        dm info VG01-s4-cow  N
        Found existing layer 'VG01-s2'
        Getting device info for VG01-s2
        dm info VG01-s2  N
        Found existing layer 'VG01-s1'
        Getting device info for VG01-s1
        dm info VG01-s1  N
        Found existing layer 'VG01-s5-cow'
        Getting device info for VG01-s5-cow
        dm info VG01-s5-cow  N
        Found existing layer 'VG01-s1-cow'
        Getting device info for VG01-s1-cow
        dm info VG01-s1-cow  N
        Found active lv lv1
        Found active lv s1
        Found active lv s2
        Found active lv s3
        Found active lv s4
        Found active lv s5
        Getting device info for VG01-s6
        dm info 
mGsdNLkAeP8eWiFjBTybhs35PB8xBwsqkryMnURZK7A5JOgpUBnciRrm1UQPLpjP N
        dm info VG01-s6  N
      Suspending VG01-lv1
        dm suspend VG01-lv1  N


*************************
process hang here..........

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] new process dead after create multiple snapshot volumes
  2005-09-17  6:27     ` Bear Wolf
  2005-09-17  8:23       ` Bear Wolf
@ 2005-09-17 19:16       ` Lars Ellenberg
  2005-09-19  1:35         ` Bear Wolf
  1 sibling, 1 reply; 8+ messages in thread
From: Lars Ellenberg @ 2005-09-17 19:16 UTC (permalink / raw)
  To: linux-lvm

/ 2005-09-17 14:27:10 +0800
\ Bear Wolf:
> I also found the process dead, that is "pdflush"
> there're 2 "pdflush" always running on my system,
> but one is dead after I create the 3rd snapshot volumes and access the
> source volume then sync

it is not "dead", it is in "uninteruptible sleep".
that is a big difference.

yes, those are the kernel threads responsible for the sync.
there are initially two of them per cpu.
if they (try to) sync to some device mapper target which is suspended,
they themselves get suspended.
this can hang the system: no io possible, nothing possible
anymore that needs io...

> -bash-3.00# ps x
>   PID TTY      STAT   TIME COMMAND
>     1 ?        S      0:01 init [2]
>     2 ?        S      0:00 [migration/0]
>     3 ?        SN     0:00 [ksoftirqd/0]
>     4 ?        S<     0:00 [events/0]
>     5 ?        S<     0:00 [khelper]
>     6 ?        S<     0:00 [kthread]
>     8 ?        S<     0:00 [kacpid]
>    70 ?        S<     0:00 [kblockd/0]
>    73 ?        S<     0:00 [khubd]
>   129 ?        S      0:00 [pdflush]
>   130 ?        D      0:00 [pdflush]
>   132 ?        S<     0:00 [aio/0]
>   131 ?        S      0:00 [kswapd0]
>   134 ?        S<     0:00 [xfslogd/0]
>   133 ?        S      0:00 [cifsoplockd]
>   135 ?        S<     0:00 [xfsdatad/0]
>   136 ?        S      0:00 [xfsbufd]
>   723 ?        S<     0:00 [kseriod]
>   773 ?        S      0:00 [scsi_eh_0]
>   777 ?        S<     0:00 [ata/0]
>   801 ?        S<     0:00 [kcryptd/0]
>   934 ?        S<     0:00 [kcopyd]
>  1330 ?        Ss     0:00 syslogd -m 0
>  1334 ?        Ss     0:00 klogd -x
>  1343 ?        Ss     0:00 /usr/httpd/bin/httpd
>  1353 ?        Ss     0:00 crond
>  1359 ?        Ss     0:00 /bin/profamd
>  1479 tty1     Ss     0:00 -bash
>  1481 tty2     Ss+    0:00 -bash
>  1483 tty3     Ss+    0:00 /sbin/mingetty tty3
>  1485 tty4     Ss+    0:00 /sbin/mingetty tty4
>  1487 tty5     Ss+    0:00 /sbin/mingetty tty5
>  1903 ?        S      0:00 [xfssyncd]
>  1915 tty1     D+     0:00 sync
>  2037 pts/0    R+     0:00 ps x

-- 
: Lars Ellenberg                                  Tel +43-1-8178292-0  :
: LINBIT Information Technologies GmbH            Fax +43-1-8178292-82 :
: Schoenbrunner Str. 244, A-1120 Vienna/Europe   http://www.linbit.com :

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [linux-lvm] new process dead after create multiple snapshot volumes
  2005-09-17 19:16       ` Lars Ellenberg
@ 2005-09-19  1:35         ` Bear Wolf
  0 siblings, 0 replies; 8+ messages in thread
From: Bear Wolf @ 2005-09-19  1:35 UTC (permalink / raw)
  To: LVM general discussion and development

Thank you Ellenberg.
now I learn more things..^_^

should I put this at Redhat Bugzila?
because it's always reproducible with RH-FC3,

"demsetup resume target &" still not work..

2005/9/18, Lars Ellenberg <Lars.Ellenberg@linbit.com>:
> / 2005-09-17 14:27:10 +0800
> it is not "dead", it is in "uninteruptible sleep".
> that is a big difference.
> 
> yes, those are the kernel threads responsible for the sync.
> there are initially two of them per cpu.
> if they (try to) sync to some device mapper target which is suspended,
> they themselves get suspended.
> this can hang the system: no io possible, nothing possible
> anymore that needs io...
> 
> > -bash-3.00# ps x
> >   PID TTY      STAT   TIME COMMAND
> >     1 ?        S      0:01 init [2]
> >     2 ?        S      0:00 [migration/0]
> >     3 ?        SN     0:00 [ksoftirqd/0]
> >     4 ?        S<     0:00 [events/0]
> >     5 ?        S<     0:00 [khelper]
> >     6 ?        S<     0:00 [kthread]
> >     8 ?        S<     0:00 [kacpid]
> >    70 ?        S<     0:00 [kblockd/0]
> >    73 ?        S<     0:00 [khubd]
> >   129 ?        S      0:00 [pdflush]
> >   130 ?        D      0:00 [pdflush]
> >   132 ?        S<     0:00 [aio/0]
> >   131 ?        S      0:00 [kswapd0]
> >   134 ?        S<     0:00 [xfslogd/0]
> >   133 ?        S      0:00 [cifsoplockd]
> >   135 ?        S<     0:00 [xfsdatad/0]
> >   136 ?        S      0:00 [xfsbufd]
> >   723 ?        S<     0:00 [kseriod]
> >   773 ?        S      0:00 [scsi_eh_0]
> >   777 ?        S<     0:00 [ata/0]
> >   801 ?        S<     0:00 [kcryptd/0]
> >   934 ?        S<     0:00 [kcopyd]
> >  1330 ?        Ss     0:00 syslogd -m 0
> >  1334 ?        Ss     0:00 klogd -x
> >  1343 ?        Ss     0:00 /usr/httpd/bin/httpd
> >  1353 ?        Ss     0:00 crond
> >  1359 ?        Ss     0:00 /bin/profamd
> >  1479 tty1     Ss     0:00 -bash
> >  1481 tty2     Ss+    0:00 -bash
> >  1483 tty3     Ss+    0:00 /sbin/mingetty tty3
> >  1485 tty4     Ss+    0:00 /sbin/mingetty tty4
> >  1487 tty5     Ss+    0:00 /sbin/mingetty tty5
> >  1903 ?        S      0:00 [xfssyncd]
> >  1915 tty1     D+     0:00 sync
> >  2037 pts/0    R+     0:00 ps x
> 
> --
> : Lars Ellenberg                                  Tel +43-1-8178292-0  :
> : LINBIT Information Technologies GmbH            Fax +43-1-8178292-82 :
> : Schoenbrunner Str. 244, A-1120 Vienna/Europe   http://www.linbit.com :
>

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2005-09-19  1:35 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2005-09-12  2:34 [linux-lvm] new process dead after create multiple snapshot volumes Bear Wolf
2005-09-12  8:05 ` Lars Ellenberg
2005-09-12  8:42   ` Bear Wolf
2005-09-17  6:27     ` Bear Wolf
2005-09-17  8:23       ` Bear Wolf
2005-09-17  8:31         ` Bear Wolf
2005-09-17 19:16       ` Lars Ellenberg
2005-09-19  1:35         ` Bear Wolf

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