Re: stalling IO regression since linux 5.12, through 5.18

Chris Murphy
2022-08-18T02:32:18Z

On Wed, Aug 17, 2022, at 2:54 PM, Chris Murphy wrote:
> On Wed, Aug 17, 2022, at 2:33 PM, Jan Kara wrote:
>> On Wed 17-08-22 14:18:01, Chris Murphy wrote:
>>>
>>>
>>> On Wed, Aug 17, 2022, at 2:15 PM, Jan Kara wrote:
>>>
>>> > 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