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

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Date:	Tue, 13 Mar 2007 22:13:34 +0200
From:	Avi Kivity <avi@...o.co.il>
To:	Christoph Hellwig <hch@...radead.org>,
	Johann Borck <johann.borck@...sedata.com>,
	linux-kernel@...r.kernel.org
Subject: Re: considering kevent - the kernel development process

Christoph Hellwig wrote:
> 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.
>   

I don't know about CGL, but a unified async notification mechanism _is_ 
needed.  In ~2002, I needed one, and what I ended up with was a Red Hat 
2.4 kernel with IO_CMD_POLL hacked in.  Five years later, mainline still 
can't do that.

Whether it's syslets, threadlets, io_getevents with networking support, 
kevents, epoll with kaio support, queued signals, or something else, 
users don't care, but they need _something_.  Please don't ignore the 
users just because they quote the wrong text.  The need is very real.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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