Re: [PATCH v2 0/3] Deferrable timers support for timerfd API

From: Thomas Gleixner
Date: Tue Feb 04 2014 - 11:10:30 EST

On Mon, 27 Jan 2014, Alexey Perevalov wrote:
> On 01/21/2014 11:12 PM, John Stultz wrote:
> >
> > Thomas: Any thought here? Should we be trying to unify the timerfd flags
> > and the posix timer flags (specifically things like TIMER_CANCEL_ON_SET,
> > which is currently timerfd-only)? Should a deferrable flag be added to
> > the hrtimer core or left to the timer wheel?

The timer cancel on set was added only to timerfd because timerfd is a
non posix interface and we are halfways free to add stuff to
it. Adding extra flags to the real posix timer interfaces is a
different story.

What's the rationale for a deferrable flag for user space interfaces?


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