On Sat, 29 Sep 2001, Chunky Kibbles wrote: > On Fri, Sep 28, 2001 at 01:14:46PM -0700, A V wrote: > > > > Hi, > > > > Does RTLinux uses virtual memory ? I hope not. > > Becaz real-time kernel should not use virtual memory. > > But in our RTLinux the module loading is taken care > > of by Linux kernel. Am i right ? Linux kernel uses > > virtual memory. How can Linux kernel know that it > > should not use virtual memory for RT-processes ? > > Please clear my doubt. > > Yes, the kernel support full virtual memory; there's no point in it not > doing so. > > The memory, though comes in two varieties for this situation: > kernel-space, and user-space. Kernel-space memory will never get > swapped out, but user-space memory can be. > > RT Linux code actually runs as a kernel module [at least, the bit you > code to be actual hard real-time]. This module runs in kernel-space, > so will never get swapped out.
Here's a bit of linux not-so-trivial trivia that I want clarified: Kernel memory doesn't get swapped out in linux, period.. right? I know some other OS kernels (especially microkernels) sometimes like to page out outter parts of the kernel.... -Calin > > Gary (-; > -- [rtl] --- > To unsubscribe: > echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR > echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] > -- > For more information on Real-Time Linux see: > http://www.rtlinux.org/ > -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] -- For more information on Real-Time Linux see: http://www.rtlinux.org/
