linux-kernel - Re: considering kevent - the kernel development process

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Message-ID: <20070313190637.GA900@infradead.org>
Date:	Tue, 13 Mar 2007 19:06:37 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	Johann Borck <johann.borck@...sedata.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: considering kevent - the kernel development process

please cut your cc lines next time, thanks.

On Tue, Mar 13, 2007 at 08:03:44PM +0100, Johann Borck wrote:
> if the next section seems obvious, please skip it
> -------------------------------------------------------------------------
> There is a need for a generic event handling mechanism in Linux - maybe 
> it is enough to cite the current CGL Performance Requirements Definition
> Version 4.0 at
> http://developer.osdl.org/dev/cgl/cgl40/cgl40-performance.pdf , page 13:
> 
> PRF.5.0     Efficient Low-Level Asynchronous Events  Priority P1            
> Description: OSDL CGL specifies that carrier grade Linux shall provide 
> an efficient capability for handling a large number of essentially 
> simultaneous asynchronous events arriving on multiple channels, such as
> multiple sockets or other similar paths. This mechanism is needed to 
> enforce system scalability and soft real-time responsiveness by
> reducing contentions appearing at the kernel level, especially under 
> high load.

It's not obvious, but utter bullshit.  Please go away if you think
starting post with quotes from CGL specs is even remotely close to
a good idea.

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