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

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Message-ID: <19684.3589.497919.669784@quad.stoffel.home>
Date:	Wed, 17 Nov 2010 12:16:53 -0500
From:	"John Stoffel" <john@...ffel.org>
To:	Lennart Poettering <mzxreary@...inter.de>
Cc:	Vivek Goyal <vgoyal@...hat.com>, "Ted Ts'o" <tytso@....edu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Dhaval Giani <dhaval.giani@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>,
	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

>>>>> "Lennart" == Lennart Poettering <mzxreary@...inter.de> writes:

Lennart> I wouldn't be too concerned here. It's not that we end up
Lennart> with 1000s of groups here. It's way < 40 or in the end, for a
Lennart> single user machine. Which I think isn't that bad.

Ok, so how will this impact users on a single machine which is used to
host VNC sessions?  I've got machines with 30+ users all running one
or more VNC sessions each on there.  Nothing CPU bound generally,
unless something freaks out and starts hogging a CPU.  But will the
overhead of 1000 groups be noticeable?

Thanks,
John
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