Foxsen(Zhang Fuxin, 张福新) has released a patch against linux 2.6.21-rc5. I have tried it today. It works well so far. My gentoo on loongson still have two minor problems, related to audio and video playback respectively. First of all, please be aware that none of these programs I used to play audio and video has any loongson specific patch. loongson has implemented its own multimedia instructions. So theoretically if properly patched, the performance will be better. On the audio side, audacious doesn't perform well when the frequency is low, while mplayer works fine. Maybe it's because they use difference libraries. On the video side, when mplayer plays some mpeg2 or divx video, video will fall behind audio, especially when the video's resolution is high. Last but not least, I heard some devs talked about loongson's profile on #gentoo-mips. It is widely accepted that it is not necessary to have a specific profile for loongson. Well, I am not insisting that we should have...