[PATCH 0/4] Was: deferring __fput()

[Oleg Nesterov]

On 06/25, Oleg Nesterov wrote:
>
> And if it always takes ->pi_lock we do not need the new PF_ or something
> else, exit_task_work() can set task->task_works = NO_MORE under ->pi_lock
> (task_work_run() can check PF_EXITING), and task_work_add() ensures that
> task_works != NO_MORE.
>
> What do you think?

It is not clear to me if you agree or not. So I am simply sending the
patches I have.

Feel free to ignore or re-do.

Seriously, why should we add 2 pointers into task_struct? Sure, this
is minor, but still... But perhaps task_work.c should not play tricks
with the circular list, task_work_run() can reverse the list as you
initially suggested.

Also, I am not sure about "define rcu_head callback_head", this series
doesn't do this. But again, up to you.

Oleg.

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