Re: workqueue lockup debug

[John Garry <john.g.garry@oracle.com>]

On 08/11/2024 08:54, Peter Zijlstra wrote:
> On Fri, Nov 08, 2024 at 09:57:38AM +1100, Dave Chinner wrote:
>> On Thu, Nov 07, 2024 at 01:39:39PM +0100, Thorsten Leemhuis wrote:
>>> On 24.10.24 17:49, John Garry wrote:
>>>> Hi workqueue and scheduler maintainers,
>>>>
>>>> As reported in https://urldefense.com/v3/__https://lore.kernel.org/linux-fsdevel/df9db1ce-17d9-49f1-__;!!ACWV5N9M2RV99hQ!K-drGDW_XBDuFwUrnEBHKIab7gT2eumqlwIEviGOHbLBedwmMvP_yJGM98ikNAU5uTtes3Ig7Lk40CG3652p$
>>>> ab6d-7ed9a4f1f9c0@oracle.com/T/
>>>> #m506b9edb1340cdddd87c6d14d20222ca8d7e8796, I am experiencing a
>>>> workqueue lockup for v6.12-rcX.
>>>
>>> John, what this resolved in between? This and the other thread[1] look
>>> stalled, but I might be missing something. Asking, because I have this
>>> on my list of tracked regressions and wonder if this is something that
>>> better should be solved one way or another before 6.12.
>>>
>>> [1]
>>> https://urldefense.com/v3/__https://lore.kernel.org/lkml/63d6ceeb-a22f-4dee-bc9d-8687ce4c7355@oracle.com/__;!!ACWV5N9M2RV99hQ!K-drGDW_XBDuFwUrnEBHKIab7gT2eumqlwIEviGOHbLBedwmMvP_yJGM98ikNAU5uTtes3Ig7Lk40NodyRwu$
>>
>> I'm still seeing the scheduler bug in -rc6.
> 
> But that WARN you reported earlier isn't there anymore. So what exactly
> are you seeing now?

My problem reported in 
https://lore.kernel.org/lkml/63d6ceeb-a22f-4dee-bc9d-8687ce4c7355@oracle.com/ 
seems to be fixed after rc5. rc6 and rc7 look ok. But I will test more.

Any idea what could be that fix?