linux-kernel - Re: [PATCHv6 0/7] system time changes notification

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Message-ID: <alpine.LFD.2.00.1011172244470.2900@localhost6.localdomain6>
Date:	Wed, 17 Nov 2010 22:46:48 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Alexander Shishkin <virtuoso@...nd.org>
cc:	Davide Libenzi <davidel@...ilserver.org>,
	Kyle Moffett <kyle@...fetthome.net>, Valdis.Kletnieks@...edu,
	LKML <linux-kernel@...r.kernel.org>,
	John Stultz <johnstul@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Kay Sievers <kay.sievers@...y.org>, Greg KH <gregkh@...e.de>,
	Chris Friesen <chris.friesen@...band.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Kirill A. Shutemov" <kirill@...temov.name>
Subject: Re: [PATCHv6 0/7] system time changes notification

On Wed, 17 Nov 2010, Alexander Shishkin wrote:

> On Wed, Nov 17, 2010 at 12:42:52PM -0800, Davide Libenzi wrote:
> > On Wed, 17 Nov 2010, Alexander Shishkin wrote:
> > 
> > > > But what you folks really want for this stuff is an extension to
> > > > timerfd as you want to be able to poll, right?
> > > > 
> > > > So what about the following:
> > > > 
> > > > Add a new flag TDF_NOTIFY_CLOCK_WAS_SET to the timerfd flags. Now this
> > > > flag adds the timer to a separate list, which gets woken up when the
> > > > clock is set.
> > > > 
> > > > No new syscall, just a few lines of code in fs/timerfd.c and
> > > > clock_was_set().
> > > > 
> > > > Thoughts ?
> > > 
> > > Something like this (sans ugliness)?
> > 
> > Oh, gosh, please.  This is interface-multiplexing-a-palooza.
> 
> Thomas made a suggestion, I came up with how it might look like so that

Yeah, I made the suggestion in the first place and I regretted it when
Davide told me that I'm nuts :)

Thanks,

	tglx
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