linux-kernel - Re: [PATCH 12/13] hrtimer: create a "timer

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Date:	Mon, 8 Sep 2008 06:40:02 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Pavel Machek <pavel@...e.cz>
Cc:	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	dwmw2@...radead.org, drepper@...hat.com, mingo@...e.hu,
	tglx@...x.de
Subject: Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in the task
 struct

On Mon, 8 Sep 2008 15:27:16 +0200
Pavel Machek <pavel@...e.cz> wrote:
> > 
> > ... which nobody uses today.
> > It's not just new syscalls, it's a new glibc api as well at that
> > point.
> 
> ...and new applications, yes. I believe applications should
> explicitely enable slacking timers.

timers are slacking today, at least for select() and poll(), and are a
great deal more so than the defaults in this patchkit.

The great advantage of the prctl() approach (which is usable) over new
system calls and glibc APIs is that it will get used, because the admin
can use it just like he uses the "nice" command, on existing software.


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