[PATCH 0/1] aio: change exit_aio() to load mm->ioctx_table once and avoid rcu_read_lock()

[Oleg Nesterov]

Completely untested and I know nothing about aio, thus needs an ack
from maintainers or should be ignored.

But exit_aio() looks "obviously unnecessarily overcomplicated", I was
really puzzled when I looked at this code by accident.

Kent, could you also explain kioctx->dead is atomic_t? This looks
pointless? afaics atomic_ buys nothing in this case.

Oleg.

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