linux-kernel - Re: [patch 3/3] Enable setting of IRQ-thread priorities from kernel cmdline. (repost:CC to LKML)

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Message-ID: <3efb10970712200450p6b100e63gd4a3b547cec5c986@mail.gmail.com>
Date:	Thu, 20 Dec 2007 13:50:49 +0100
From:	"Remy Bohmer" <linux@...mer.net>
To:	"Jaswinder Singh" <jaswinderlinuxrt@...il.com>
Cc:	"Steven Rostedt" <rostedt@...dmis.org>,
	"Arnaldo Carvalho de Melo" <acme@...stprotocols.net>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Juergen Beisert" <jbe@...gutronix.de>,
	"Darren Hart" <dvhltc@...ibm.com>, linux-rt-users@...r.kernel.org,
	"Sven-Thorsten Dietrich" <sdietrich@...ell.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [patch 3/3] Enable setting of IRQ-thread priorities from kernel cmdline. (repost:CC to LKML)

> By default, all softirq-threads or IRQs will be RT task but if there
> is some option user can switch it to NON-RT task then it will be good.

Okay, understood.
I will think about how to add that too. But, probably we can add it
seperately from this patchset.

Kind Regards,

Remy


2007/12/20, Jaswinder Singh <jaswinderlinuxrt@...il.com>:
> Hello Remy,
>
> On 12/20/07, Remy Bohmer <linux@...mer.net> wrote:
> > So, Is this a serious requirement? Should this be possible?
>
> I have noticed this problem:
> root@....168.1.253:~# cat /proc/loadavgrt
> 1.00 1.00 1.00 0/52 1158
> root@....168.1.253:~# cat /proc/loadavg
> 0.00 0.00 0.02 1/52 1159
> root@....168.1.253:~#
>
> So I am curious, if possible, user can switch softirq-threads or IRQs
> RT tasks to non-RT tasks for slow hardware or least important hardware
> for NON-RT tasks. So this will improve RT behaviour.
>
> By default, all softirq-threads or IRQs will be RT task but if there
> is some option user can switch it to NON-RT task then it will be good.
>
> Thank you,
>
> Jaswinder Singh.
>
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