Write buffers have nothing to do with anything when Dolphin doesn't write anything to your disc images. All that does is screw up a lot of I/O prioritizing your OS is trying to do for very good reasons. As well as making it very unsafe to actually use your system or keep anything remotely valuable on it. If that actually helped you then you have some severe problems with your system chewing up I/O for reasons unrelated to Dolphin, and you should fix that instead of telling people to gut their OSes write buffers.
step 2 is whatever. Doesn't actually harm anything
step 3 is whatever. Might help if again, something else on your system is really screwing with your I/O, which I'm pretty dang sure is the case here, with the things you recommended.
step 2 is whatever. Doesn't actually harm anything
step 3 is whatever. Might help if again, something else on your system is really screwing with your I/O, which I'm pretty dang sure is the case here, with the things you recommended.