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Here is a patch against the current O1int patch in 2.5.74-mm1.
Since the O1int didn't mean anything I thought I'd call this O2int.

This one wont blow you away but tames those corner cases.

Changes:
The child penalty is set on 80% which means that tasks that wait on their 
children have children forking just on the edge of the interactive delta so 
they shouldn't starve their own children.

The non linear sleep avg boost is scaled down slightly to prevent this 
particular boost from being capable of making a task highly interactive. This 
makes very new tasks less likely to have a little spurt of too high priority.

Idle tasks now get their static priority over the full time they've been 
running rather than starting again at 1 second. This makes it harder for idle 
tasks to suddenly become highly interactive and _then_ fork an interactive 
bomb. Not sure on this one yet.

The sched_exit penalty to parents of cpu hungry children is scaled accordingly 
(was missed on the original conversion so works better now).

Hysteresis on interactive buffer removed (was unecessary).

Minor cleanup.

Known issue remaining:
Mozilla acts just like X in that it is mostly interactive but has bursts of 
heavy cpu activity so it gets the same bonus as X. However it makes X jerky 
during it's heavy cpu activity, and might in some circumstances make audio 
skip. Fixing this kills X smoothness as they seem very similar to the 
estimator. Still haven't sorted a workaround for this one but I'm working on 
it. Ingo's original timeslice granularity patch helps a little and may be 
worth resuscitating (and the desktop only people can change the granularity 
down to 10ms to satisfy their needs).

Con
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