linux-kernel - Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

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Message-ID: <4CE3D763.9020904@earthlink.net>
Date:	Wed, 17 Nov 2010 08:23:47 -0500
From:	Stephen Clark <sclark46@...thlink.net>
To:	Lennart Poettering <mzxreary@...inter.de>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>, david@...g.hm,
	Dhaval Giani <dhaval.giani@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>,
	Vivek Goyal <vgoyal@...hat.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>
Subject: Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

On 11/16/2010 04:14 PM, Lennart Poettering wrote:
> On Tue, 16.11.10 12:38, Linus Torvalds (torvalds@...ux-foundation.org) wrote:
>
>    
>> On Tue, Nov 16, 2010 at 12:33 PM, Lennart Poettering
>> <mzxreary@...inter.de>  wrote:
>>      
>>> No you don't. Because that is not a desktop use case.
>>>        
>> See my other response. You don't care AT ALL, because by your
>> judgement, all desktop is is a web browser and a word processor.
>>      
> Well, I do care. But I care more about *real* problems. For example the
> fact that "updatedb" makes your system sluggish while it runs. Or
> "man-db". Or anything else that runs from cron in the background.
>
> Doing this tty dance won't help you much with background tasks such as
> man-db, updatedb and cron and its jobs, will it? They don't have
> ttys. Sorry for you. meh! Meh! meh! meh! meh!
>
> (And along comes systemd, which actually handles this properly, since it
> actually has a proper notion of what a service is, and what a session
> is, and what an app is. And which hence can control all this sanely.)
>
> Binding this to a tty is just solves a tiny bit of the real problem:
> i.e. your own use of make -j. End of story.
>
> Lennart
>
>    
Oh, you mean real problems like systemd can boot 10 seconds faster. What 
is 10 seconds when your system is up days or weeks?

-- 

"They that give up essential liberty to obtain temporary safety,
deserve neither liberty nor safety."  (Ben Franklin)

"The course of history shows that as a government grows, liberty
decreases."  (Thomas Jefferson)



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