[linux-lvm] LVM hangs

Zdenek Kabelac zkabelac at redhat.com
Mon Nov 13 14:51:21 UTC 2017

Dne 13.11.2017 v 14:41 Alexander 'Leo' Bergolth napsal(a):
> Hi!
> I have a EL7 desktop box with two sata harddisks and two ssds in a
> LVM raid1 - thin pool - cache configuration. (Just migrated to this
> setup a few weeks ago.)
> After some days, individual processes start to block in disk wait.
> I don't know if the problem resides in the cache-, thin- or raid1-layer
> but the underlying block-devices are fully responsive.
> I have prepared some info at:
>    http://leo.kloburg.at/tmp/lvm-blocks/
> Do the stack backtraces provide enough information to locate the source
> of the blocks?
> I'd be happy to provide additional info, if necessary.
> Meanwhile I'll disable the LVM cache layer to eliminate this potential
> candidate.


It would be probably nice to see the result of 'dmsetup status'

I'd have guessed you are probably hitting  'frozen' raid state
which is unfortunate existing upstream bug.



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