Re: WARNING at kernel/sched/core.c:2013 migration_cpu_stop+0x2e3/0x330

[Oleksandr Natalenko <oleksandr@xxxxxxxxxxxxxx>]

On 16.11.2020 11:31, Valentin Schneider wrote:
> On 16/11/20 10:27, Oleksandr Natalenko wrote:
> > Hi.
> [...]
> > Not sure whether the check is legitimate, but FWIW I've managed to put 
> > a
> > test task [1] (it spawns a lot of threads and applies affinity) into a
> > permanent unkillable D state here:
> >
> > ```
> > [<0>] affine_move_task+0x2d3/0x620
> > [<0>] __set_cpus_allowed_ptr+0x164/0x210
> > [<0>] sched_setaffinity+0x21a/0x300
> > [<0>] __x64_sys_sched_setaffinity+0x8c/0xc0
> > [<0>] do_syscall_64+0x33/0x40
> > [<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > ```
> [...]
> > I'm not positive about this being directly related to the original
> > report, but I think it is still worth mentioning.
>
> Aye, thanks, that one should be fixed by:
>
> https://lore.kernel.org/r/20201113112414.2569-1-valentin.schneider@xxxxxxx

Great, thanks, I'll pick it up now.

> > Thanks.
> >
> > [1] https://gitlab.com/post-factum/burn_scheduler

--
  Oleksandr Natalenko (post-factum)