linux-kernel - Re: Scheduling the highest priority task

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Message-ID: <46B1F182.3010608@felicis.org>
Date:	Thu, 02 Aug 2007 17:00:18 +0200
From:	Martin Roehricht <ml@...icis.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Scheduling the highest priority task

On 08/02/2007 01:40 PM, Ingo Molnar wrote:
> in the SMP migration code, the 'old scheduler' indeed picks the lowest 
> priority one, _except_ if that task is running on another CPU or is too 
> 'cache hot':

But why is it, that the scheduler picks the lowest priority one? I 
thought sched_find_first_bit() picks the index of the lowest order bit 
in the bitmap and thus the highest priority job. Is that wrong?
What needs to be changed to let the scheduler pick the highest priority 
task from a given runqueue?
I am very confused ...

Martin
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