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: <1985e0f60712200445o4f854cdep6eebf1726737229b@mail.gmail.com>
Date:	Thu, 20 Dec 2007 18:15:40 +0530
From:	"Jaswinder Singh" <jaswinderlinuxrt@...il.com>
To:	"Remy Bohmer" <linux@...mer.net>
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)

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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