Re: [PATCH 04/19] sched: Prepare for Core-wide rq->lock

[Josh Don]

On Wed, Apr 28, 2021 at 9:41 AM Don Hiatt <dhiatt@xxxxxxxxxxxxxxxx> wrote:
>
> I'm still seeing hard lockups while repeatedly setting cookies on qemu
> processes even with
> the updated patch. If there is any debug you'd like me to turn on,
> just let me know.
>
> Thanks!
>
> don

Thanks for the added context on your repro configuration. In addition
to the updated patch from earlier, could you try the modification to
double_rq_lock() from
https://lkml.kernel.org/r/CABk29NuS-B3n4sbmavo0NDA1OCCsz6Zf2VDjjFQvAxBMQoJ_Lg@xxxxxxxxxxxxxx
? I have a feeling this is what's causing your lockup.

Best,
Josh