[bug-report] task info hung problem in fb_deferred_io_work()

[Harshit Mogalapalli]

Hi Takashi,
On 19/04/24 13:15, Takashi Iwai wrote:
> On Fri, 19 Apr 2024 09:39:09 +0200,
>>> Then later on, the commit 33cd6ea9c067 changed cancel_*() to
>>> flush_delayed_work() blindly, and the known problem resurfaced again.
>>>
>>
>> I have reverted that commit, but still could see some other task hung
>> message as shared here on other reply:
>>
>> https://lore.kernel.org/all/d2485cb9-277d-4b8e-9794-02f1efababc9@oracle.com/
> 
> Yes, then it could be a different cause, I suppose.
> The crash with flush_delayed_work() was a real crash, no hanging task,
> IIRC.
> 
> Can you reproduce the issue with the latest Linus upstream, too?
> 

Yes, this was reproduced on 6.9-rc4 kernel[1], also reverting that 
commit 33cd6ea9c067 on upstream still showed another issue[2].


[1]https://lore.kernel.org/all/271372d6-e665-4e7f-b088-dee5f4ab341a@oracle.com/
[2] 
https://lore.kernel.org/all/d2485cb9-277d-4b8e-9794-02f1efababc9@oracle.com/


Thanks,
Harshit

> 
> thanks,
> 
> Takashi