linux-kernel - Re: 2.6.28 has unconfigurable group sched?

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Message-ID: <496DFACE.10403@glines.org>
Date:	Wed, 14 Jan 2009 06:46:38 -0800
From:	Mark Glines <mark@...nes.org>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Ingo Molnar <mingo@...e.hu>, L-K <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.28 has unconfigurable group sched?

Peter Zijlstra wrote:
>> So it seems rt_schedulable() is never succeeding.  Any ideas?
> 
> Yeah, I should test this user grouping stuff more often :/
> 
> The below fixes it for me.
> ---
> Subject: sched: fix bandwidth validation for UID grouping 
> 
> For UID grouping we initialize the root group with infinite bandwidth
> which by default is actually more than the global limit, therefore the
> bandwidth check always fails.
> 
> Because the root group is a phantom group (for UID grouping) we cannot
> runtime adjust it, therefore we let it reflect the global bandwidth
> settings.

Thanks.  Sadly, this doesn't seem to change anything for me.  I applied
it to 2.6.28, rebuilt and reinstalled, and got the same result.  I did a
clean rebuild to be sure; and got the same behavior again.

Please let me know if there are any additional diagnostics I can provide.

Mark
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