linux-kernel - Re: RFC: A revised timerfd API

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Message-ID: <517f3f820709220907l4c4e693di3df6942bdca5bcfa@mail.gmail.com>
Date:	Sat, 22 Sep 2007 18:07:14 +0200
From:	"Michael Kerrisk" <mtk.linux.lists@...il.com>
To:	"Bernd Eckenfels" <ecki@...a.inka.de>
Cc:	linux-kernel@...r.kernel.org,
	"Ulrich Drepper" <drepper@...hat.com>, geoff@...are.org.uk,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Christoph Hellwig" <hch@....de>,
	"Jonathan Corbet" <corbet@....net>,
	"Randy Dunlap" <rdunlap@...otime.net>, vda.linux@...glemail.com,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Lee Schermerhorn" <Lee.Schermerhorn@...com>,
	"David Härdeman" <david@...deman.nu>,
	mtk-manpages@....net
Subject: Re: RFC: A revised timerfd API

Hello Bernd,

Please don't trim the CC list when replying!  I nearly did not see
your reply, and others will have missed it also.

On 9/22/07, Bernd Eckenfels <ecki@...a.inka.de> wrote:
> In article <46F514C9.5010208@....net> you wrote:
> >  1. This design stretches the POSIX timers API in strange
> >     ways.
>
> Maybe it is possible to reimplement the POSIX API in usermode using the
> kernel's FD implementation?

It's a clever idea...  Without thinking on it too long, I'm not sure
whether or not there might be some details which would make this
difficult.

> (and drop the posix support from kernel)

However we couldn't drop POSIX support from the kernel, because that
would break the ABI.

Cheers,

Michael
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