On Mon, 1 Nov 2004 11:49:45 +0530, Vishal Soni <vishal@xxxxxxxxxxxxxxxxxx> wrote: > 1. Will this changing of Shared Memory and Page Size give any qualms to the > system performance or working?? You can't just change the PAGE_SIZE without changing all code which updates the hardware page tables to set the corresponding bitfields which deal with that size. Note that even then, you'll only be able to use sizes which the underlying hardware supports - I'm not sure whether such AMD processors support 16K page sizes, but they might. > 2. Is there anything i shud consider or change along with tuning above Macro > values? You'll need to overhaul the page table handing code for your platform in arch/asm. > where in the memory does shared memory come from > User Space or Kernel Space.........or from process's Data Segment.... Shared memory is regular userspace memory which is shared between several processes through page table mappings, but it's not kernel memory any more than any other regular user memory is so. It's worth noting that the "process's Data Segment" is simply regular user memory also but just marked as being part of the corresponding vma. I think it's worth reading a book on Linux Virtual Memory - e.g. Understanding the Linux Virtual Memory Manager - before attempting to proceed with these modifications. Cheers, Jon. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
