linux-kernel - Re: Syslets, Threadlets, generic AIO support, v6

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Message-ID: <Pine.LNX.4.64.0705301503210.6272@alien.or.mcafeemobile.com>
Date:	Wed, 30 May 2007 15:06:22 -0700 (PDT)
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Ulrich Drepper <drepper@...hat.com>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, Jeff Garzik <jeff@...zik.org>,
	Zach Brown <zach.brown@...cle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrew Morton <akpm@....com.au>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Evgeniy Polyakov <johnpol@....mipt.ru>,
	"David S. Miller" <davem@...emloft.net>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Syslets, Threadlets, generic AIO support, v6

On Wed, 30 May 2007, Ulrich Drepper wrote:

> You also have to be aware that open() is just one piece of the puzzle.
> What about socket()?  I've cursed this interface many times before and
> now it's biting you: there is parameter to pass a flag.  What about
> transferring file descriptors via Unix domain sockets?  How can I decide
> the transferred descriptor should be in the private namespace?

Well, we can't just replicate/change every system call that creates a file 
descriptor. So I'm for something like:

int sys_fdup(int fd, int flags);

So you basically create your fds with their native/existing system calls, 
and then you dup/move them into the prefered fd space.



- Davide


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