linux-kernel - Re: [Priority Inheritance] SCHED_FIFO or SCHED

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Date:	Sun, 02 Oct 2011 09:50:07 +0200
From:	Mike Galbraith <efault@....de>
To:	"Tadeus (Eus) Prastowo" <0x657573@...glemail.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [Priority Inheritance] SCHED_FIFO or SCHED_RR?

On Sat, 2011-10-01 at 22:29 +0200, Tadeus (Eus) Prastowo wrote:
> On Sat, Oct 1, 2011 at 7:41 AM, Mike Galbraith <efault@....de> wrote:
> > On Fri, 2011-09-30 at 21:12 +0200, Tadeus (Eus) Prastowo wrote:
> >> > Why should a SCHED_NORMAL task inheriting the priority of a SCHED_RR
> >> > task get the privilege of SCHED_FIFO task for running as long as it
> >> > wishes even when the task giving the inheritance does not have such
> >> > privilege?
> >
> > Existence of a critical section > slice would be the real problem, no?
> 
> No, it's not a problem because if a real-time system designer puts a
> real-time task under SCHED_RR, he will calculate the length of the
> critical section by taking into account the slice.

Submit a patch, and see if it flies.

	-Mike

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