linux-kernel - Re: One of these things (CONFIG

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Message-ID: <CAKGA1bndiQkVSFh=Fpk8WjLe4L_EFyRa1mHyVUF9PFine-Wpcg@mail.gmail.com>
Date:	Mon, 21 Jan 2013 18:26:14 -0600
From:	Matt Sealey <matt@...esi-usa.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	John Stultz <john.stultz@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Linux ARM Kernel ML <linux-arm-kernel@...ts.infradead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	linux-samsung-soc@...r.kernel.org, Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>
Subject: Re: One of these things (CONFIG_HZ) is not like the others..

On Mon, Jan 21, 2013 at 6:09 PM, Matt Sealey <matt@...esi-usa.com> wrote:

[LAKML: about lack of SCHED_HRTICK because we don't use
kernel/Kconfig.hz on ARM)]

> kind of leaves ARM in the doghouse.. who knows what weirdo scheduler
> reactions are related to it not being enabled. Maybe when it is, HZ
> *would* need to be allowed to be bumped when using this code path?

Or conversely maybe this is exactly why the Samsung maintainers
decided they need HZ=200, because SCHED_HRTICK isn't being enabled and
they're experiencing some multimedia lag because of it?

-- 
Matt Sealey <matt@...esi-usa.com>
Product Development Analyst, Genesi USA, Inc.
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