Re: [PATCH 05/18] Add io_uring IO interface

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On Tue, Jan 29, 2019 at 2:35 PM Jens Axboe <axboe@xxxxxxxxx> wrote:
>
> On 1/29/19 5:12 AM, Florian Weimer wrote:
> > * Jens Axboe:
> >
> >> +#define IORING_MAX_ENTRIES  4096
> >
> > Where does this constant come from?  Should it really be exposed to
> > userspace?
>
> Seems pretty handy for the application to know what the limit is?

The running kernel version might be different from the kernel version
whose headers the userspace code was compiled with. So if this is a
limit that might change at some point in the future, and you think
userspace wants to know the limit, some other API might be better.



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