Спасибо форониксу - http://www.phoronix.com/scan.php?page=news_item&px=ODQ3Mw
Wu Fengguang and KOSAKI Motohiro have published patches this week that they believe will address some of these responsiveness issues, for which they call the «system goes unresponsive under memory pressure and lots of dirty / writeback pages» bug.
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The patches from Fengguang and Motohiro can be found in this Linux kernel mailing list thread. With the Linux 2.6.36 kernel merge window about to be opened, let's hope these patches work their way in there during this next cycle, but for those planning to run the stock kernel on Ubuntu 10.10 and other Q3'2010 distributions, it is already too late unless these small patches end up being back-ported.