Re: Kernel patches enabling better POSIX AIO (Was Re: [3/4] kevent: AIO, aio_sendfile)

From: Jakub Jelinek
Date: Sat Aug 12 2006 - 15:26:06 EST

On Sat, Aug 12, 2006 at 12:10:35PM -0700, Ulrich Drepper wrote:
> > I am wondering about that too. IIRC, the IO_NOTIFY_* constants are not
> > part of the ABI, but only internal to the kernel implementation. I think
> > Zach had suggested inferring THREAD_ID notification if the pid specified
> > is not zero. But, I don't see why ->sigev_notify couldn't used directly
> > (just like the POSIX timers code does) thus doing away with the
> > new constants altogether. Sebestian/Laurent, do you recall?
> I suggest to model the implementation after the timer code which does
> exactly what we need.

Yeah, and if at all possible we want to use just one helper thread for
SIGEV_THREAD notification of timers/aio/etc., so it really should behave the
same as timer thread notification.

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