Brad,
thanks for the bug report. This is exactly the problem I am having (log-wise).
>>>
>>> You don't give any indication what version you are running but see
>>> https://tracker.ceph.com/issues/23205
>>
>>
>> the cluster is an Proxmox installation which is based on an Ubuntu kernel.
>>
>> # ceph -v
>> ceph version 12.2.5 (dfcb7b53b2e4fcd2a5af0240d4975adc711ab96e) luminous
>> (stable)
>>
>> The mistery is that these blocked requests occur numerously when at least
>> one of the 6 servers is booted with kernel 4.15.17, if all are running
>> 4.13.16 the number of blocked requests is infrequent and low.
>
> Sounds like you need to profile your two kernel versions and work out
> why one is under-performing.
>
Well, the problem is that I see this behavior only in our production system (6
hosts and 22 OSDs total). The test system I have is
a bit smaller (only 3 hosts with 12 OSDs on older hardware) and shows no sign
of this possible regression…
Regards,
Uwe
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