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Subject: Re: [2.6.16-rc6 patch] fix interactive task starvation
From: Mike Galbraith <efault@gmx.de>
To: Con Kolivas <kernel@kolivas.org>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org, mingo@elte.hu
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	 <20060318000549.4bb35800.akpm@osdl.org>
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Date: Sat, 18 Mar 2006 10:43:56 +0100
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On Sat, 2006-03-18 at 19:15 +1100, Con Kolivas wrote:
> On Saturday 18 March 2006 19:05, Andrew Morton wrote:
> > Mike Galbraith <efault@gmx.de> wrote:
> > > The patch below fixes a starvation problem that occurs when a stream of
> > >  highly interactive tasks delay an array switch for extended periods
> > >  despite EXPIRED_STARVING(rq) being true.  AFAIKT, the only choice is to
> > >  enqueue awakening tasks on the expired array in this case.
> > >
> > >  Without this patch, it can be nearly impossible to remotely login to a
> > >  busy server, and interactive shell commands can starve for minutes.
> > >
> > >  This has not been verified by anyone.  Comments?
> >
> > What does that question mean, btw?
> 
> He's waiting for me to say I don't like it. But I do like it.

<chuckle>

No.  Actually, I'm waiting for Ingo to just yawn and nuke the problem
with a casual flick of his pinkie.

	-Mike

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