Re: [3/4] kevent: AIO, aio_sendfile() implementation.

Sébastien Dugué
2006-07-28T07:29:44Z

On Thu, 2006-07-27 at 11:44 -0700, Ulrich Drepper wrote:
> Badari Pulavarty wrote:
> > Before we spend too much time cleaning up and merging into mainline -
> > I would like an agreement that what we add is good enough for glibc
> > POSIX AIO.
>
> I haven't seen a description of the interface so far. Would be good if
> it existed. But I briefly mentioned one quirk in the interface about
> which Suparna wasn't sure whether it's implemented/implementable in the
> current interface.
>
> If a lio_listio call is made the individual requests are handle just as
> if they'd be issue separately. I.e., the notification specified in the
> individual aiocb is performed when the specific request is done. Then,
> once all requests are done, another notification is made, this time
> controlled by the sigevent parameter if lio_listio.
>
>
> Another feature which I always wanted: the current lio_listio call
> returns in blocking mode only if all requests are done. In non-blocking
> mode it returns immediately and the program needs to poll the aiocbs.
> What is needed is something in the middle. For instance, if multiple
> read requests are issued the program might be able to start working as
> soon as one request is satisfied. I.e., a call similar to lio_listio
> would be nice which also takes another parameter specifying how many of
> the NENT aiocbs have to finish before the call returns.

You're right here, that definitely would be a plus.

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Sébastien Dugué BULL/FREC:B1-247
phone: (+33) 476 29 77 70 Bullcom: 229-7770

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Linux POSIX AIO: http://www.bullopensource.org/posix
http://sourceforge.net/projects/paiol

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