I have been using the 2.6 kernel for a while in my system
and noticed that the desktop is not responsive under cpu load.
kernel gentoo-sources-2.4.22-r5 is better for me in this
respect.
I have the exact opposite experience - my desktop responsiveness has improved dramatically since switching to 2.6. One relevant setting is CONFIG_PREEMPT (under Processor type and features in menuconfig), which you want to be set for a desktop system.
--Diego
The same goes for my system, I turned the preemption option on, and the mouse cursor doesn't
start to jump nearly as easily as with kernel 2.4.24 under heavy I/O load (e.g. when emerge executes
a "tar xjf").
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