On Wed, Aug 17, 2022, at 2:54 PM, Chris Murphy wrote:

On Wed, Aug 17, 2022, at 2:33 PM, Jan Kara wrote:

quoted

On Wed 17-08-22 14:18:01, Chris Murphy wrote:

quoted

On Wed, Aug 17, 2022, at 2:15 PM, Jan Kara wrote:

quoted

OK, if this indeed passes then b6e68ee82585 ("blk-mq: Improve performance
of non-mq IO schedulers with multiple HW queues") might be what's causing
issues (although I don't know how yet...).

I can revert it from 5.12.0 and try. Let me know which next test is preferred :)

Let's try to revert this first so that we have it narrowed down what
started causing the issues. 

OK I've reverted b6e68ee82585, and removing 
megaraid_sas.host_tagset_enable=0, and will restart the workload...

I ran this for 7 hours and the problem didn't happen.

-- 
Chris Murphy