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

[Oleg Nesterov]

On 04/29, Benjamin LaHaise wrote:
>
> On Tue, Apr 29, 2014 at 08:39:15PM +0200, Oleg Nesterov wrote:
> >
> > Kent, could you also explain kioctx->dead is atomic_t? This looks
> > pointless? afaics atomic_ buys nothing in this case.
>
> If it wasn't atomic, it would need to be volatile.

Then ACCESS_ONCE() in aio_read_events() makes more sense. Although
I can't say I understand why it is needed.

Oleg.

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