Comment 240 for bug 131094

The importance is (already) marked as "high". I wonder, is it difficult to fix or reproduce? Some ppl claim this is a regression since kernel 2.6.15.

Anyway, the bug is real, I (like many others) tested it on my dual booting computer, and the Ubuntu desktop feels significantly less responsive than winXP when doing file I/O in the background, it's also a bit annoying that the bug has been filed back in 2007 and there still seems to be certain uncertainty around it.