linux-kernel - Re: How to avoid data copies in a driver ?

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Message-ID: <20080521104153.GC4948@ucw.cz>
Date:	Wed, 21 May 2008 12:41:53 +0200
From:	Pavel Machek <pavel@....cz>
To:	Francis Moreau <francis.moro@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: How to avoid data copies in a driver ?

On Wed 2008-05-14 21:54:03, Francis Moreau wrote:
> Hello,
> 
> I'd like to optimize my driver, which receives data through a fifo and gives
> them to a user space application. In turns this application moves this data
> into a file.
> 
> To avoid several useless copies, I'd like the application to pass to the driver
> a  file descriptor (?) to  the driver and then the driver can directly move the
> received data to that file.
> 
> Could anybody give me some example of such scheme ?

man splice?

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