From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Ingo Oeser <ioe-lkml@rameria.de>
Cc: Ingo Molnar <mingo@elte.hu>,
Andreas Huber <andreas.huber@keymile.com>,
linux-kernel@vger.kernel.org, Mike Galbraith <efault@gmx.de>,
Dmitry Adamushko <dmitry.adamushko@gmail.com>
Subject: Re: Scheduler RR, first time slice wrong?
Date: Fri, 07 Nov 2008 13:31:02 +0100 [thread overview]
Message-ID: <1226061062.2697.26.camel@twins> (raw)
In-Reply-To: <200811071020.06422.ioe-lkml@rameria.de>
On Fri, 2008-11-07 at 10:19 +0100, Ingo Oeser wrote:
> Hi Peter,
>
> On Thursday 06 November 2008, Peter Zijlstra wrote:
> > Currently we inherit the RR time-slice from our parent. In case that is
> > init we inherit the 1s value set by default, in case its an already
> > running RR task, we inherit whatever is left.
> >
> > Fix both these by resetting the time-slice on fork.
>
> I remember that this MIGHT be on purpose to mitigate fork bombs.
>
> Behaviour was, that you could starve others, if you fork,
> do little or no work and fork again before your timeslice is over.
>
> But I'm not sure this applies here...
Right, RT tasks have it easy starving stuff ;-)
prev parent reply other threads:[~2008-11-07 12:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-06 7:22 Scheduler RR, first time slice wrong? Andreas Huber
2008-11-06 7:44 ` Ingo Molnar
2008-11-06 8:46 ` Peter Zijlstra
2008-11-07 9:19 ` Ingo Oeser
2008-11-07 12:31 ` Peter Zijlstra [this message]
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