Re: [linux-lvm] [lvm-devel] lvcreate hangs forever and udev work timeout

[Zdenek Kabelac <zkabelac@redhat.com>]

Dne 12. 04. 19 v 17:03 Eric Ren napsal(a):
> Hi,
> 
>> Although the /dev/dm-26 is visible, but the device seems not ready in kernel.
> 
> Sorry, it's not:
> 
> [root@iZuf6dbyd7ede51sykedamZ ~]# dmsetup info /dev/dm-26
> Device dm-26 not found
> Command failed.
> 
> [root@iZuf6dbyd7ede51sykedamZ ~]# dmsetup info /dev/dm-25
> Name:              vg0-21
> State:             ACTIVE
> Read Ahead:        256
> Tables present:    LIVE
> Open count:        0
> Event number:      0
> Major, minor:      252, 25
> Number of targets: 1
> UUID: LVM-PIFRRbKrhSqE5j6Q8jfk1qJJ1TNFPUI2SzDoe3z1azKH6HAOPsleizy3LozEMJus
> 
> [root@iZuf6dbyd7ede51sykedamZ ~]# dmsetup status | grep vg0-22
> vg0-22: 0 20971520 thin 274432 20971519
> 
> [root@iZuf6dbyd7ede51sykedamZ ~]# dmsetup info vg0-22
> Name:              vg0-22
> State:             ACTIVE
> Read Ahead:        256
> Tables present:    LIVE
> Open count:        0
> Event number:      0
> Major, minor:      252, 26
> Number of targets: 1
> UUID: LVM-PIFRRbKrhSqE5j6Q8jfk1qJJ1TNFPUI2YMnwPdLNF3JggAzXGwaFujcPePyOAeqd
> 

Hi

Hmm would it be possible that associated thin pool would be in some erroneous 
condition - i.e. out-of-space - or processing some resize ?
This likely could result into some significant processing delay ?

Since you are using very ancient lvm2  (2.02.130) we have heavily improved 
logic for such pools over the time...


Zdenek