linux-kernel - Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

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Message-ID: <20070226192001.GA17892@2ka.mipt.ru>
Date:	Mon, 26 Feb 2007 22:20:02 +0300
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Chris Friesen <cfriesen@...tel.com>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ulrich Drepper <drepper@...hat.com>,
	linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Andrew Morton <akpm@....com.au>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Zach Brown <zach.brown@...cle.com>,
	"David S. Miller" <davem@...emloft.net>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

On Mon, Feb 26, 2007 at 12:56:33PM -0600, Chris Friesen (cfriesen@...tel.com) wrote:
> Evgeniy Polyakov wrote:
> 
> >I never ever tried to say _everything_ must be driven by events.
> >IO must be driven, it is a must IMO.
> 
> Do you disagree with Linus' post about the difficulty of treating 
> open(), fstat(), page faults, etc. as events?  Or do you not consider 
> them to be IO?

>From practical point of view - yes some of that processes are complex
enough to not attract attention as async usage model.

But I'm absolutely for the scenario, when several operations are 
performed asynchronously like open+stat+fadvice+sendfile.

By IO I meant something which has end result, and that result must be
enough to start async processing - data in the buffer for example.
Async open I would combine with actual data processing - that one can be
a one event.

> Chris

-- 
	Evgeniy Polyakov
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