On Thu, 15 Nov 2007, Micah Dowty wrote:
> On all kernels I've tested from after your patch was committed, I can
> reproduce a problem where a single high-priority thread which wakes up
> very frequently can artificially inflate the SMP balancer's load
> average for one CPU, causing other tasks to be migrated off that
> CPU. The result is that this high-priority thread (which may only use
> a few percent CPU) gets an entire CPU to itself. Even if there are
> several busy-looping threads running, this CPU will be mostly idle.
I am a bit at a loss as to how this could relate to the patch. This looks
like a load balance logic issue that causes the load calculation to go
wrong?
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