Re: Very slow SYS_io_destroy()

[Alex Richman]

Thanks for the response. I'm running 4.4.123-1 from Gentoo. It also 
happens on 4.4.87-r1.

Cheers,
- Alex.

On 23/07/18 16:13, Jeff Moyer wrote:
> Alex Richman <alex.r@xxxxxxxxxxxx> writes:
>
> > Hi,
> >
> > I'm seeing some weirdness with AIO, specifically SYS_io_destroy() is
> > taking upwards of ~100000 microseconds (~100 miliseconds) per call.
> > How long is that call expected to take? I can see from the source
> Well, it waits for an RCU grace period.  I would not expect that to take
> 100ms, though.  What kernel version is this?
>
> -Jeff

--
Alex Richman
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Engineering
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