From: Con Kolivas <kernel@kolivas.org>
To: Paolo Ornati <ornati@fastwebnet.it>
Subject: Re: [SCHED] Totally WRONG prority calculation with specific test-case (since 2.6.10-bk12)
Date: Wed, 28 Dec 2005 22:19:23 +1100
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       Ingo Molnar <mingo@elte.hu>
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On Wednesday 28 December 2005 22:01, Paolo Ornati wrote:
> 	after some hours of running transcode (with me away from the
> machine) I've found a totally UNUSABLE system. Transcode was the king
> of the machine and everything else get almost no CPU time. Switching to
> a Text-Console takes something like 10s (or something like that). When
> I was finally logged in as root I've reniced transcode and companyto +19
> and the system was usable again ;)
>
> To get things even more STRANGE: another time that this happened I've
> done the same thing except that I've reniced them to "0" (the same nice
> level they were running) ---> And the system became usable again (with
> the usual slow down but still usable).
>
> This is what I remember. Now I think we can agree that there is
> something wrong... no?

This latter thing sounds more like your transcode job pushed everything out to 
swap... You need to instrument this case better.

Con
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