From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: leemgs1@gmail.com
Cc: Ingo Molnar <mingo@elte.hu>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-rt-users <linux-rt-users@vger.kernel.org>,
tglx <tglx@linutronix.de>, williams <williams@redhat.com>
Subject: Re: [PATCH]sched: fix typo in sched-rt-group.txt file
Date: Tue, 12 May 2009 11:15:38 +0200 [thread overview]
Message-ID: <1242119738.11251.322.camel@twins> (raw)
In-Reply-To: <1242117459.31161.11.camel@centos51>
On Tue, 2009-05-12 at 17:37 +0900, GeunSik Lim wrote:
>
>
> Dear Ingo,
>
> I found typo about the range of static priority ( = realtime priority )
> in "./Documentation/scheduler/sched-rt-group.txt" file.
>
> If I don't understand static priority levels, Correct me.
Right, that 'confusion' stems from the fact that our in-kernel priority
lists do consider all 140 priorities.
The patch looks good though.
> commit d6af702008117ca489a2f5476239d1688a517e98
> Author: GeunSik,Lim <leemgs1@gmail.com>
> Date: Tue May 12 17:20:32 2009 +0900
>
> sched: fix typo in sched-rt-group.txt file
>
> Fix typo about static priority's range.
> Kernel Space priority: 0 to 99 --> User Space RT priority 99 to 0
> Kernel Space priority: 100 to 139 --> User Space nice -20 to 19
>
> Signed-off-by: GeunSik Lim <geunsik.lim@samsung.com>
>
> diff --git a/Documentation/scheduler/sched-rt-group.txt b/Documentation/scheduler/sched-rt-group.txt
> index 5ba4d3f..1537146 100644
> --- a/Documentation/scheduler/sched-rt-group.txt
> +++ b/Documentation/scheduler/sched-rt-group.txt
> @@ -169,7 +169,7 @@ get their allocated time.
>
> Implementing SCHED_EDF might take a while to complete. Priority Inheritance is
> the biggest challenge as the current linux PI infrastructure is geared towards
> -the limited static priority levels 0-139. With deadline scheduling you need to
> +the limited static priority levels 0-99. With deadline scheduling you need to
> do deadline inheritance (since priority is inversely proportional to the
> deadline delta (deadline - now).
>
>
>
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>
> GeunSik Lim (ELS - OS Group - S/W Lab - SAIT - SAMSUNG)
> e-Mail :1) geunsik.lim@samsung.com
> 2) leemgs@gmail.com , leemgs1@gmail.com
> HomePage: http://intomail.dnip.net/invain/me/
> -----------------------------------------------
next prev parent reply other threads:[~2009-05-12 9:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-12 8:37 [PATCH]sched: fix typo in sched-rt-group.txt file GeunSik Lim
2009-05-12 9:15 ` Peter Zijlstra [this message]
2009-05-12 9:42 ` Ingo Molnar
2009-05-12 11:05 ` GeunSik Lim
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