nvme/039 intermittent failure

[John Garry]

On 30/06/2026 02:55, Shin'ichiro Kawasaki wrote:
> CC+ Alan,
> 

- alan, who is no longer with Oracle

> On Jun 29, 2026 / 15:30, John Garry wrote:
>> I have noticed nvme/039 for passthru error logging intermittently failing on
>> v7.2-rc1
>>
>> For failures, passthrough kernel logs are missing sometimes.
>>
>> I had not noticed this on older kernels.
> 
> So far I do not observe the failure with v7.2-rc1 kernel.
> 
>>
>> I do note that the passthru error logging kernel code uses
>> pr_err_ratelimited(), so this can hardly ever be a reliable test.
>>
>> Is this a known issue?
> 
> I wasn't aware of it. Do you observe any kernel message that indicate
> that the error message, like "X: Y callbacks suppressed"?

No, but now I find that the missing log is not occurring, but I always 
get the log with the unexpected cdw10 value

> If so, the
> test case maybe able to check the message to see if the test result is
> reliable or not.
> 
> Alan, may I ask you to share your thoughts about the comment?

I'll check it further

Thanks!