Re: INFO: suspicious rcu_dereference_check() usage -kernel/pid.c:419 invoked rcu_dereference_check() without protection!

[Oleg Nesterov]

On 11/09, Paul E. McKenney wrote:
>
> Thank you, Oleg!  Greg, would you be willing to update your patch
> to remove the comment?  (Perhaps tasklist_lock as well...)

Agreed, I think tasklock should be killed.


But wait. Whatever we do, isn't this code racy? I do not see why, say,
sys_ioprio_set(IOPRIO_WHO_PROCESS) can't install ->io_context after
this task has already passed exit_io_context().

Jens, am I missed something?

Oleg.

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