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.
Hi
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.
Regards
Zdenek
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