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From: Matt Sealey <matt@genesi-usa.com>
Date: Mon, 21 Jan 2013 18:26:14 -0600
Message-ID: <CAKGA1bndiQkVSFh=Fpk8WjLe4L_EFyRa1mHyVUF9PFine-Wpcg@mail.gmail.com>
Subject: Re: One of these things (CONFIG_HZ) is not like the others..
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: John Stultz <john.stultz@linaro.org>, Arnd Bergmann <arnd@arndb.de>,
        Linux ARM Kernel ML <linux-arm-kernel@lists.infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>,
        linux-samsung-soc@vger.kernel.org, Ben Dooks <ben-linux@fluff.org>,
        Kukjin Kim <kgene.kim@samsung.com>
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On Mon, Jan 21, 2013 at 6:09 PM, Matt Sealey <matt@genesi-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@genesi-usa.com>
Product Development Analyst, Genesi USA, Inc.