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Description of problem:
We have seen in our tests that when a system has crashed and recovered that there was a slab journal block underflow logged.
Version-Release number of selected component (if applicable):
kmod-kvdo-6.2.2.117
How reproducible:
Rare
Steps to Reproduce:
Cause a slab journal block underflow (unknown currently how to reproduce) by maybe crashing the system a whole bunch of times, but it is unclear what conditions specifically cause it.
Actual results:
[38918.224042] uds: kvdo1:physQ0: assertion "decrement of lock count for slab journal block 958 must not underflow" ((-adjustment <= lock->count)) failed at /var/lib/dkms/kvdo/6.2.2/build/kvdo/slabJournal.c:1129
Expected results:
A more clear message indicating what caused the underflow and by how much, and eventually no message at all.
Additional info:
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (kmod-kvdo bug fix and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2020:4551