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From: Thomas Gleixner <tglx@linutronix.de>
To: Josh Triplett <josh@joshtriplett.org>
Cc: Richard Cochran <richardcochran@gmail.com>,
	John Stultz <john.stultz@linaro.org>,
	Nicolas Pitre <nico@fluxnic.net>,
	lkml <linux-kernel@vger.kernel.org>
Subject: Re: [RFC/PATCH] posix-timers: make them configurable
Date: Fri, 9 Sep 2016 15:47:54 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.20.1609091546160.5679@nanos> (raw)
In-Reply-To: <20160909080034.2cw7pnbu5vu7dc5j@x>

On Fri, 9 Sep 2016, Josh Triplett wrote:

> On Fri, Sep 09, 2016 at 09:48:57AM +0200, Richard Cochran wrote:
> > On Thu, Sep 08, 2016 at 02:19:24PM -0700, John Stultz wrote:
> > > Also given many other syscalls take clockids and the backing logic
> > > isn't really getting removed (probably could cut the dynamic posix
> > > clocks core with the same conditional), I wonder if you could get a
> > > similar size win by taking a slightly more narrow cutting of the
> > > subsystem. That way you could preserve the more useful clock_gettime()
> > > functionality, but maybe stub out some of the less often used
> > > functionality.
> > 
> > I want to support tinification, but I also doubt the utility of
> > removing clock_gettime() and clock_nanosleep().  I can't imagine ever
> > building a user space without those.  In fact, thinking about IoT,
> > having good time is critical, and so these are the *last* functions I
> > would remove when downsizing.
> 
> 1) If you already have another function providing time and don't need two.

Agreed.

> 2) If you run an entirely event-driven loop and don't sleep.

I hope you wanted to say: and don't use *nanosleep() :) Otherwise you'd
have a full busy polling event loop which I doubt is desirable ...

Thanks,

	tglx


 

  reply	other threads:[~2016-09-09 13:50 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-08 21:05 [RFC/PATCH] posix-timers: make them configurable Nicolas Pitre
2016-09-08 21:19 ` John Stultz
2016-09-08 21:48   ` Josh Triplett
     [not found]   ` <i7B1bN3EzSJWci7B2bJXya@videotron.ca>
2016-09-08 23:56     ` Nicolas Pitre
2016-09-09  0:37       ` Josh Triplett
2016-09-09  7:48   ` Richard Cochran
2016-09-09  8:00     ` Josh Triplett
2016-09-09 13:47       ` Thomas Gleixner [this message]
2016-09-09 13:46     ` Thomas Gleixner
2016-09-09 13:39 ` Thomas Gleixner
2016-09-13 20:57   ` Nicolas Pitre
2016-09-14  9:47     ` Thomas Gleixner

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