Is anybody else running 2.4.x on a PowerMac Dual G4? (I've got a "mirrored drive door" model[1].) If I take the kernel-patch-powerpc-2.4.27 source package and rebuild it with config/powerpc-smp changed so that CONFIG_HIGHMEM=y (instead of being not set), the resulting kernel is horrendously unstable. I can't even get through the boot process with processing segfaulting, or the dynamic linker failing to resolve symbols. Returning to a "# CONFIG_HIGHMEM is not set" kernel that is otherwise identical is extremely stable and reliable. Problem is, I've got a gig of RAM and, you know, I'd like to actually use it all. Here's the beginning of dmesg with a non-highmem kernel: Memory BAT mapping: BAT2=256Mb, BAT3=256Mb, residual: 512Mb Warning, memory limited to 512 Mb, use CONFIG_HIGHMEM to reach 1024 Mb Total memory = 512MB; using 1024kB for hash table (at c0600000) Unfortunately I don't have the output of the highmem kernel anymore, but I can reboot the box into that horrible unstable kernel to collect it if need be. If I had to speculate, I'd say these parameters have something to do with it: CONFIG_HIGHMEM_START=0xfe000000 CONFIG_LOWMEM_SIZE=0x30000000 CONFIG_KERNEL_START=0xc0000000 CONFIG_TASK_SIZE=0x80000000 [1] http://www.lowendmac.com/ppc/g4-125.html -- G. Branden Robinson | When I die I want to go peacefully Debian GNU/Linux | in my sleep like my ol' Grand branden@debian.org | Dad...not screaming in terror like http://people.debian.org/~branden/ | his passengers.
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