linux-kernel - Re: Kernel patches enabling better POSIX AIO (Was Re: [3/4] kevent: AIO, aio

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Date:	Mon, 04 Sep 2006 16:37:54 +0200
From:	Sébastien Dugué <sebastien.dugue@...l.net>
To:	Jakub Jelinek <jakub@...hat.com>
Cc:	Ulrich Drepper <drepper@...hat.com>, suparna@...ibm.com,
	Badari Pulavarty <pbadari@...ibm.com>,
	Zach Brown <zach.brown@...cle.com>,
	Christoph Hellwig <hch@...radead.org>,
	Evgeniy Polyakov <johnpol@....mipt.ru>,
	lkml <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>, linux-aio@...ck.org
Subject: Re: Kernel patches enabling better POSIX AIO (Was Re: [3/4]
	kevent: AIO, aio_sendfile)

On Sat, 2006-08-12 at 15:28 -0400, Jakub Jelinek wrote:
> 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.
> 

  That's exactly what is done in libposix-aio.

  Sébastien.

-- 
-----------------------------------------------------

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

  mailto:sebastien.dugue@...l.net

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

-----------------------------------------------------

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