linux-kernel - Re: Idea: Feature information / extensions dispatcher syscall.

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Date:	Wed, 22 Apr 2009 16:33:36 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Igor Zhbanov <izh1979@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Idea: Feature information / extensions dispatcher syscall.

> Yes, you need a file handle. To open device each time you need to make ioctl
> is expensive and keeping device opened may prevent unmounting /proc
> that could be a problem in some installations if that application is used
> at a boot time.

- Nobody in the real world unmounts /proc.
- You don't need to use /proc anyway
- You don't need to open the device each ioctl
- Even if you did open is extremely quick

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