> Therefore i wonder, if there are any known problems with the > MMU on 8xx and 2.4.2x which might explain that? >
I did some work on an 885 with Linux 2.4.22. I found that when the processor was running at 100MHz or higher Linux would die when decompressing the ramdisk. Below 100MHz it would run fine. I came up with a hacky fix because I mis-read an errata notice. What I did was set the ICTRL register to 0x00000001, this fixed the problem. Basically all this does is slow the processor down considerable. The Linux you have may be doing the same thing. This could explain the performance hit you are seeing.
