Thanks for the realistic appraisal. I am interested in setting the page size such that the available TLB entries map the entire physical memory. The idea is to eliminate TLB misses completely. Thanks, Sriram.K "Education is the ability to listen to almost anything without losing your temper or your self-confidence" --Robert Frost On Thu, 21 Oct 2004, Jon Masters wrote: > On Thu, 21 Oct 2004 09:48:45 -0400 (EDT), sriram krishnamoorthy > <krishnsr@xxxxxxxxxxxxxxxxxx> wrote: > > > I am interested in changing the linux kernel to use a different page size > > (on PowerPC 440). What should I look for and how hard is it? > > You need to look in arch/ppc/mm and include/asm-ppc/pgtable.h > > As to how hard it is, I would say not as difficult as building the > International Space Station or winning the X Prize, but sufficiently > difficult that, unless you have experience with the TLB behaviours and > workings of ppc (especially book E stuff) and are happy with playing > with this stuff then it's not worth bothering. If you want to change > the size then you'll need to go tramping over a range of stuff - but > did you not just want to play with pinning the kernel in to memory > with some larger mappings perhaps? That's already being done. > > I had to try to get 2.4.1<mumble> (various versions) working on ppc > 4xx when it was broken for a time and only the Monta tree actually > even built or ran. It was sufficiently non-trivial that I essentially > waited for the Monta cleanups to go in to 2.4.21 or so. I use 2.4.23 > happily now on work boards. > > Jon. > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
