Home » Mailing list archives » linux-kernel » 2008 » September » 30

Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in the task struct

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
[view in full thread]
From: Arjan van de Ven <arjan@...>
To: KOSAKI Motohiro <kosaki.motohiro@...>
Cc: <kosaki.motohiro@...>, <linux-kernel@...>, <torvalds@...>, <dwmw2@...>, <drepper@...>, <mingo@...>, <tglx@...>
Subject: Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in the task struct
Date: Tuesday, September 30, 2008 - 4:28 am

On Tue, 30 Sep 2008 14:16:09 +0900 (JST)

KOSAKI Motohiro  wrote:


> I wonder to why PR_SET_TIMERSLACK decreasing doesn't need root


setting timerslack to 0 has no real negative effects on the system on

the one hand, on the other hand, it'll be multimedia apps and games who

want to do this.


Requiring this type of app to be root doesn't sound like a good idea,

especially since all you get by "cheating" is ... the exact behavior

you ask for anyway. "Increased power consumption" isn't a root

privilege, the app can consume much more power just by a "while (1);"

loop for example.


--

Arjan van de Ven 	Intel Open Source Technology Centre

For development, discussion and tips for power savings,

visit http://www.lesswatts.org

--
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
Messages in current thread:
[PATCH 0/13] Turn hrtimers into a range capable timer, Arjan van de Ven, (Mon Sep 1, 7:03 pm)
Re: [PATCH 0/13] Turn hrtimers into a range capable timer, Rusty Russell, (Thu Sep 11, 11:39 pm)
Re: [PATCH 0/13] Turn hrtimers into a range capable timer, Thomas Gleixner, (Fri Sep 12, 4:24 pm)
Re: [PATCH 0/13] Turn hrtimers into a range capable timer, Arjan van de Ven, (Fri Sep 12, 1:42 am)
Re: [PATCH 0/13] Turn hrtimers into a range capable timer, Ingo Molnar, (Sat Sep 6, 10:56 am)
Re: [PATCH 0/13] Turn hrtimers into a range capable timer, Arjan van de Ven, (Sat Sep 6, 12:30 pm)
Re: [PATCH 0/13] Turn hrtimers into a range capable timer, Ingo Molnar, (Sat Sep 6, 12:33 pm)
[PATCH 10/13] hrtimer: rename the "expires" struct member to..., Arjan van de Ven, (Mon Sep 1, 7:12 pm)
[PATCH 9/13] hrtimer: convert sound/ to the new hrtimer apis, Arjan van de Ven, (Mon Sep 1, 7:11 pm)
[PATCH 8/13] hrtimer: convert s390 to the new hrtimer apis, Arjan van de Ven, (Mon Sep 1, 7:10 pm)
[PATCH 7/13] hrtimer: convert kvm-ia64 to the new hrtimer apis, Arjan van de Ven, (Mon Sep 1, 7:09 pm)
[PATCH 6/13] hrtimer: convert powerpc/oprofile to the new hr..., Arjan van de Ven, (Mon Sep 1, 7:09 pm)
[PATCH 5/13] hrtimer: convert kernel/* to the new hrtimer apis, Arjan van de Ven, (Mon Sep 1, 7:08 pm)
[PATCH 4/13] hrtimer: convert net::sched_cbq to the new hrti..., Arjan van de Ven, (Mon Sep 1, 7:07 pm)
[PATCH 13/13] hrtimer: make select() and poll() use the hrti..., Arjan van de Ven, (Mon Sep 1, 7:14 pm)
Re: [PATCH 13/13] hrtimer: make select() and poll() use the ..., Peter Zijlstra, (Tue Sep 2, 4:22 am)
Re: [PATCH 13/13] hrtimer: make select() and poll() use the ..., Arjan van de Ven, (Tue Sep 2, 12:03 pm)
[PATCH 3/13] hrtimer: convert timerfd to the new hrtimer apis, Arjan van de Ven, (Mon Sep 1, 7:06 pm)
[PATCH 12/13] hrtimer: create a "timer_slack" field in the t..., Arjan van de Ven, (Mon Sep 1, 7:14 pm)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., KOSAKI Motohiro, (Tue Sep 30, 1:16 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Arjan van de Ven, (Tue Sep 30, 4:28 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., KOSAKI Motohiro, (Tue Sep 30, 4:54 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Pavel Machek, (Tue Sep 2, 6:04 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Arjan van de Ven, (Tue Sep 2, 9:03 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Pavel Machek, (Mon Sep 8, 9:27 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Arjan van de Ven, (Mon Sep 8, 9:40 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Pavel Machek, (Mon Sep 8, 10:15 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Ulrich Drepper, (Sun Sep 14, 11:21 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Pavel Machek, (Sun Sep 14, 11:57 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Ulrich Drepper, (Sun Sep 14, 12:04 pm)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Pavel Machek, (Wed Sep 17, 3:42 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Arjan van de Ven, (Sun Sep 14, 12:14 pm)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Arjan van de Ven, (Sun Sep 14, 11:27 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Arjan van de Ven, (Mon Sep 8, 10:22 am)
Re: [PATCH 12/13] hrtimer: create a "timer_slack" field in t..., Pavel Machek, (Sat Sep 13, 12:24 pm)
[PATCH 2/13] hrtimer: convert kvm to the new hrtimer apis, Arjan van de Ven, (Mon Sep 1, 7:05 pm)
[PATCH 11/13] hrtimer: turn hrtimers into range timers, Arjan van de Ven, (Mon Sep 1, 7:13 pm)
Re: [PATCH 11/13] hrtimer: turn hrtimers into range timers, Peter Zijlstra, (Tue Sep 2, 4:22 am)
Re: [PATCH 11/13] hrtimer: turn hrtimers into range timers, Arjan van de Ven, (Tue Sep 2, 9:05 am)
Re: [PATCH 11/13] hrtimer: turn hrtimers into range timers, Peter Zijlstra, (Tue Sep 2, 9:47 am)
Re: [PATCH 11/13] hrtimer: turn hrtimers into range timers, Arjan van de Ven, (Tue Sep 2, 12:02 pm)
Re: [PATCH 11/13] hrtimer: turn hrtimers into range timers, Peter Zijlstra, (Tue Sep 2, 7:08 am)
Re: [PATCH 11/13] hrtimer: turn hrtimers into range timers, Arjan van de Ven, (Tue Sep 2, 9:06 am)
Re: [PATCH 11/13] hrtimer: turn hrtimers into range timers, Peter Zijlstra, (Tue Sep 2, 7:15 am)
[PATCH 1/13] hrtimer: add abstraction functions for accessin..., Arjan van de Ven, (Mon Sep 1, 7:05 pm)
[PATCH 10/13] hrtimer: rename the "expires" struct member to..., Arjan van de Ven, (Mon Sep 1, 7:12 pm)