linux-kernel - Re: [PATCH] [RFC] notify userspace about time changes

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Message-ID: <AANLkTimmD1wijmyiSY8xHLyr_fQF52LyUpn3fmT1W_3=@mail.gmail.com>
Date:	Wed, 4 Aug 2010 14:54:12 +0200
From:	Bastien ROUCARIES <roucaries.bastien@...il.com>
To:	Alexander Shishkin <virtuoso@...nd.org>
Cc:	lkml@...r.kernel.org, "Kirill A. Shutemov" <kirill@...temov.name>,
	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <johnstul@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jon Hunter <jon-hunter@...com>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	David Howells <dhowells@...hat.com>,
	Avi Kivity <avi@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
	John Kacur <jkacur@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [RFC] notify userspace about time changes

On Wed, Aug 4, 2010 at 2:48 PM, Alexander Shishkin <virtuoso@...nd.org> wrote:
> Certain userspace applications (like "clock" desktop applets or ntpd) might
> want to be notified when some other application changes the system time. It
> might also be important for an application to be able to distinguish between
> its own and somebody else's time changes.

Why not implementing somtehing like http://lwn.net/Articles/323658/ a
la plan 9 with a poll callback ?

It will be plan9 compatible and so unix

Bastien
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