Re: Help diagnosing lvm ioctl log spam

Dne 09. 10. 24 v 11:28 Fabricio Winter napsal(a):
> Hello people, we have been experiencing an issue with lvm2-thin on
> _some_ of our production servers where out of nowhere
> lvm2/device-mapper starts spamming error logs and I can't really seem
> to trace down the root cause.
> 
> This is what the logs look like;
> Oct  9 06:25:02 U5bW8JT7 lvm[8020]: device-mapper: waitevent ioctl on
> LVM-CP5Gw8QrWLqwhBcJL87R1mc9Q9KTBtQQmOowipTAFuM7hqzHz6pRVvUaNO9FGzeq-tpool
> failed: Inappropriate ioctl for device
> Oct  9 06:25:02 U5bW8JT7 lvm[8020]: waitevent: dm_task_run failed:
> Inappropriate ioctl for device

Hi

Have you considered to try using kernel & lvm2 from the more modern age where
the 'nvme' storage actually become a regularly available commodity hw ?

I'd have guess your issue likely already has been solved.

Otherwise if you do want to do a hunt for a particular IO - use 'blktrace' 
tool - likely on tpool_tdata (or tpool_tmeta) volume.

Regards

Zdenek