netdev - Re: [take36 10/10] kevent: Kevent based generic AIO.

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Date:	Mon, 12 Feb 2007 13:12:57 +0000
From:	Alan <alan@...rguk.ukuu.org.uk>
To:	Andi Kleen <ak@...e.de>
Cc:	Evgeniy Polyakov <johnpol@....mipt.ru>,
	David Miller <davem@...emloft.net>,
	Ulrich Drepper <drepper@...hat.com>,
	Andrew Morton <akpm@...l.org>, netdev <netdev@...r.kernel.org>,
	Zach Brown <zach.brown@...cle.com>,
	Christoph Hellwig <hch@...radead.org>,
	Chase Venters <chase.venters@...entec.com>,
	Johann Borck <johann.borck@...sedata.com>,
	linux-kernel@...r.kernel.org, Jeff Garzik <jeff@...zik.org>,
	Jamal Hadi Salim <hadi@...erus.ca>,
	Ingo Molnar <mingo@...e.hu>, linux-fsdevel@...r.kernel.org
Subject: Re: [take36 10/10] kevent: Kevent based generic AIO.

> I'm sure others would want them then for their favourite system call combo
> too. If they were really useful it might make more sense to have a batch() 
> system call that works for arbitary calls, but I'm not convinced yet
> it's even needed. It would be certainly ugly.

batch() would possibly make a lot of sense in terms of the fibril/thread
based removal for the need for all the AIO stuff, just to provide a
natural way to group and order sequences of synchronous operations into
asynchronous groups.

I am extremely sceptical about the need for aio_sendfile_path since with
sendfile/sendpath hacking around there didn't seem to be much gain.

I'm even more sceptical of the header buffer stuff as while other OS's do
that as a hack to make TCP packetising work we simply fixed the root
problem with TCP_CORK

Alan
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