Re: [PATCH] aio: Add command to wait completion of all requests

[Cyrill Gorcunov]

On Tue, Jun 13, 2017 at 12:45:39PM +0300, Kirill Tkhai wrote:
> > 
> > I'm not that familiar with AIO internals but this snippet worries me:
> > the reqs_available is unsigned int, reqs is unsigned it as well but
> > used as an accumulator over ALL cpus, can't it get overflow and
> > gives modulo result, should not it be unsigned long or something?
> 
> All available reqs are initially contain in kioctx::reqs_available,
> which is atomic_t, and then they are distributed over percpu counters.
> So, this is OK.

Thanks for explanation! Looks ok to me. But I'm far from being
aio expert, if someone else won't beat me I'll take a closer
look in [a day|couple of] or so.