Should I apply the forcedeth-rt-tweak?

Hi all,

I've noticed that since patch-2.6.21.4-rt13 (included) the
forcedeth-rt-tweak patch

http://people.redhat.com/mingo/realtime-preempt/testing/forcedeth-rt-tweak.patch

has been drop from the main rt patch. Does this mean that it should be
no longer necessary?

This little patch is supposed to prevent nVidia ethernet cards to
permanently suck about 3% of the CPU, even though it didn't work for
me. So far I've tried with

2.6.21 + 2.6.21.3 patch + rt9 patch (which includes the nforce patch)

2.6.21 + 2.6.21.4 patch + rt13 patch + nforce patch

Thanks,

Free