Hi,
Indeed:
root@sympa:~# swapon -s
Nom de fichier Type Taille Utilisé Priorité
/dev/xvdb1 partition 2096124 0 -2
/dev/dm-1 partition 2084860 0 -3
root@sympa:~# swapoff /dev/sympa-vg/swap_1
root@sympa:~# lvdisplay
...
--- Logical volume ---
LV Path /dev/sympa-vg/swap_1
LV Name swap_1
VG Name sympa-vg
LV UUID 1b59OW-M2yW-PuI1-QN5t-pN0w-6Akl-AnJnNh
LV Write Access read/write
LV Creation host, time sympa, 2019-07-10 11:06:42 +0200
LV Status available
# open 0
LV Size <1,99 GiB
Current LE 509
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:1
root@sympa:~# swapon /dev/sympa-vg/swap_1
root@sympa:~# lvdisplay
...
--- Logical volume ---
LV Path /dev/sympa-vg/swap_1
LV Name swap_1
VG Name sympa-vg
LV UUID 1b59OW-M2yW-PuI1-QN5t-pN0w-6Akl-AnJnNh
LV Write Access read/write
LV Creation host, time sympa, 2019-07-10 11:06:42 +0200
LV Status available
# open 2
LV Size <1,99 GiB
Current LE 509
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:1
I wonder if there is a similar tool for regular filesystem types.
Regards
On 11/07/2019 17:17, Zdenek Kabelac wrote:
Dne 11. 07. 19 v 11:39 Simon ELBAZ napsal(a):
Hi,
I have setup a Debian 10 VM to understand the issue.
root@sympa:~# uname -a
Linux sympa 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5 (2019-06-19)
x86_64 GNU/Linux
root@sympa:~# lvdisplay /dev/sympa-vg/swap_1
--- Logical volume ---
LV Path /dev/sympa-vg/swap_1
LV Name swap_1
VG Name sympa-vg
LV UUID 1b59OW-M2yW-PuI1-QN5t-pN0w-6Akl-AnJnNh
LV Write Access read/write
LV Creation host, time sympa, 2019-07-10 11:06:42 +0200
LV Status available
# open 2
LV Size <1,99 GiB
Current LE 509
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:1
root@sympa:~# lsof | grep "254,1"
root@sympa:~# dmsetup info
Name: sympa--vg-swap_1
State: ACTIVE
Read Ahead: 256
Tables present: LIVE
Open count: 2
Event number: 0
Major, minor: 254, 1
Number of targets: 1
UUID:
LVM-Imuz5YW2OXfsyO2ChOPPLI5flib9YlLi1b59OWM2yWPuI1QN5tpN0w6AklAnJnNh
Name: sympa--vg-root
State: ACTIVE
Read Ahead: 256
Tables present: LIVE
Open count: 1
Event number: 0
Major, minor: 254, 0
Number of targets: 1
UUID:
LVM-Imuz5YW2OXfsyO2ChOPPLI5flib9YlLiJMF1vN1e6TKmfV1rT0fvWJnpViu7BMw5
root@sympa:~# lsof | grep swap_1
root@sympa:~#
Could someone pls give me some hints to verify the "open" value ?
Hi
Have you tried 'swapon -s' ?
From the name I'd have guessed it's an active swapping device (so held
open by kernel and not visible by user-space tools like lsof)
'swapoff' should close opened swapping device (in case you have enough
free RAM to live without swap space)
Regards
Zdenek
--
Simon Elbaz
@Linagora
Mob: +33 (0) 6 38 99 18 34
Tour Franklin 31ème étage
100/101 Quartier Boieldieu
92042 La Défense
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