Re: High priority tasks break SMP balancer?

From: Micah Dowty
Date: Wed Nov 14 2007 - 13:39:42 EST


On Fri, Nov 09, 2007 at 04:11:03PM -0800, Micah Dowty wrote:
> It's also possible this problem doesn't occur on 2.6.17. I have only
> tested this example on 2.6.23.1 and 2.6.20 so far.

I tested a handful of kernel versions, and it looks like this is
indeed the case. As far as I can tell, this problem was introduced
between 2.6.19.7 and 2.6.20.

Looking at the diff between those versions, it looks like there were
some noteworthy changes to the SMP balancer. I'm still working on
narrowing this down further.

Thanks,
--Micah
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