Re: io_uring failure on parisc with VIPT caches

Jens Axboe
2023-02-15T23:03:58Z

On 2/15/23 2:39 PM, John David Anglin wrote:
> On 2023-02-15 4:06 p.m., John David Anglin wrote:
>> On 2023-02-15 3:37 p.m., Jens Axboe wrote:
>>>> System crashes running test buf-ring.t.
>>> Huh, what's the crash?
>> Not much info.  System log indicates an HPMC occurred. Unfortunately, recovery code doesn't work.
> The following occurred running buf-ring.t under gdb:
>
> INFO: task kworker/u64:9:18319 blocked for more than 123 seconds.
>       Not tainted 6.1.12+ #4
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/u64:9   state:D stack:0     pid:18319 ppid:2 flags:0x00000000
> Workqueue: events_unbound io_ring_exit_work
> Backtrace:

I don't think this is buf-ring, it's off the exit path which is offloaded
and most likely related to your iopoll report.

--
Jens Axboe