linux-kernel - Re: [PATCH] [RFC] timerfd: add TFD_NOTIFY_CLOCK

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Date:	Wed, 01 Dec 2010 17:46:09 -0500
From:	Valdis.Kletnieks@...edu
To:	Jamie Lokier <jamie@...reable.org>
Cc:	Lennart Poettering <mzxreary@...inter.de>,
	Alexander Shishkin <virtuoso@...nd.org>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Feng Tang <feng.tang@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michael Tokarev <mjt@....msk.ru>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	John Stultz <johnstul@...ibm.com>,
	Chris Friesen <chris.friesen@...band.com>,
	Kay Sievers <kay.sievers@...y.org>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Artem Bityutskiy <dedekind1@...il.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] [RFC] timerfd: add TFD_NOTIFY_CLOCK_SET to watch for clock changes

On Wed, 01 Dec 2010 10:43:59 GMT, Jamie Lokier said:

> So maybe CLOCK_MONOTONIC should be changed to include elapsed time
> during suspend/resume, and CLOCK_MONOTONIC_RAW could remain as it is,
> for programs that want that?

Wouldn't that be an API break for programs that are expecting the current
behavior of CLOCK_MONOTONIC?  Yes, there should be a way to request either of
them - but if there's only one way now, it should continue to act the current
way, and the added way is the second option.


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