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Re: [RFC/PATCH] Add sysfs control to modify a user's cpu share

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From: Dave Jones <davej@...>
To: Dhaval Giani <dhaval@...>
Cc: Ingo Molnar <mingo@...>, Srivatsa Vaddagiri <vatsa@...>, Mike Galbraith <efault@...>, Peter Zijlstra <a.p.zijlstra@...>, Dmitry Adamushko <dmitry.adamushko@...>, lkml <linux-kernel@...>, <maneesh@...>, Andrew Morton <akpm@...>, Sudhir Kumar <skumar@...>
Subject: Re: [RFC/PATCH] Add sysfs control to modify a user's cpu share
Date: Monday, October 1, 2007 - 12:12 pm

On Mon, Oct 01, 2007 at 07:34:54PM +0530, Dhaval Giani wrote:
 > Hi Ingo,
 > 
 > Adds tunables in sysfs to modify a user's cpu share.
 > 
 > A directory is created in sysfs for each new user in the system.
 > 
 > 	/sys/kernel/uids/<uid>/cpu_share
 > 
 > Reading this file returns the cpu shares granted for the user.
 > Writing into this file modifies the cpu share for the user. Only an 
 > administrator is allowed to modify a user's cpu share.
 > 
 > Ex: 
 > 	# cd /sys/kernel/uids/
 > 	# cat 512/cpu_share
 > 	1024
 > 	# echo 2048 > 512/cpu_share
 > 	# cat 512/cpu_share
 > 	2048
 > 	#

Can we start adding stuff to Documentation/ for new files created
in sysfs ?  There's so much undocumented stuff in there now that
it's unfunny.

A great start would be 'wtf is a cpu_share and why would I want to
change it' ?

	Dave

-- 
http://www.codemonkey.org.uk
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Messages in current thread:
[RFC/PATCH] Add sysfs control to modify a user's cpu share, Dhaval Giani, (Mon Oct 1, 10:04 am)
Re: [RFC/PATCH] Add sysfs control to modify a user's cpu share, Dave Jones, (Mon Oct 1, 12:12 pm)
Re: [RFC/PATCH] Add sysfs control to modify a user's cpu share, Srivatsa Vaddagiri, (Mon Oct 1, 12:37 pm)
Re: [RFC/PATCH] Add sysfs control to modify a user's cpu share, Ingo Molnar, (Mon Oct 1, 10:44 am)
[RFC/PATCH -v2] Add sysfs control to modify a user's cpu share, Dhaval Giani, (Wed Oct 3, 1:10 pm)
Re: [RFC/PATCH -v2] Add sysfs control to modify a user's cpu..., Ingo Molnar, (Thu Oct 4, 3:57 am)
Re: [RFC/PATCH -v2] Add sysfs control to modify a user's cpu..., Heiko Carstens, (Thu Oct 4, 4:54 am)
[PATCH sched-devel] Generate uevents for user creation/destr..., Srivatsa Vaddagiri, (Tue Oct 9, 11:12 am)
Re: [PATCH sched-devel] Generate uevents for user creation/d..., Ingo Molnar, (Wed Oct 10, 3:42 am)
Re: [RFC/PATCH -v2] Add sysfs control to modify a user's cpu..., , (Thu Oct 4, 5:32 pm)
Re: [RFC/PATCH -v2] Add sysfs control to modify a user's cpu..., Srivatsa Vaddagiri, (Fri Oct 5, 3:01 am)
Re: [RFC/PATCH -v2] Add sysfs control to modify a user's cpu..., Bill Davidsen, (Thu Oct 4, 12:02 pm)
Re: [RFC/PATCH -v2] Add sysfs control to modify a user's cpu..., Srivatsa Vaddagiri, (Thu Oct 4, 1:20 pm)
Re: [RFC/PATCH] Add sysfs control to modify a user's cpu share, Eric St-Laurent, (Tue Oct 2, 6:12 pm)
Re: [RFC/PATCH] Add sysfs control to modify a user's cpu share, Srivatsa Vaddagiri, (Wed Oct 3, 12:09 am)
Re: [RFC/PATCH] Add sysfs control to modify a user's cpu share, Srivatsa Vaddagiri, (Mon Oct 1, 11:32 am)