On 6 Aug, this message from Benjamin Herrenschmidt echoed through cyberspace: > Something else we may want to > implement is a way (sysctl ?) to control the ICTC (instruction cache > throttling). This has the effect of slowing down instruction fetching > by the CPU and lowering it's temperature & power consumption.
I have most of the code for this ready; but it was for 2.2 kernels (nothing fancy; just a copy of the l2cr bit :-). I've looked at how one can integrate it into 2.4. We'd need a sysctl number in kernel/sysctl.[c,h], and a function handling the gory details. We could move the l2cr sysctl out of ppc_htab.c together with ICTC control into a separate ppc_sysctl.c file. What remains is to decide whether ICTC gets a separate feature bit in cputable.[c,h]. Cheers Michel ------------------------------------------------------------------------- Michel Lanners | " Read Philosophy. Study Art. 23, Rue Paul Henkes | Ask Questions. Make Mistakes. L-1710 Luxembourg | email [EMAIL PROTECTED] | http://www.cpu.lu/~mlan | Learn Always. "
