This project might be useful: http://web.yl.is.s.u-tokyo.ac.jp/~tosh/kml or google "kernel mode linux" It allows user processes to run in kernel mode lowering sycall and context switch overheads. MHD.Tayseer Alquoatli wrote: > On 1/7/06, Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote: >> On Sat, 2006-01-07 at 13:05 +0100, +BigNose wrote: >> > Hello, >> > >> > I don't know if this is the right place to ask my question. If not, >> > please tell me where to put the question... >> > >> > I read in several places, that Linux 2.6 can be configured with no >> > Virtual Memory Support. But I couldn't find any such option in the >> > kernel config. The only option I found was to disable the Swapping. >> > But not the Virtual Memory System. > > AFAIK there is no option to tell your Linux kernel to ignore VM .. i > think you are talking about uclinux: > http://www.uclinux.org/ > which is a port of the Linux kernel to MMUless hardware and to some of > MMU capable hardware and it's widely used in embedded environments.. > you can check the available port .. but AFAIK there is no port for x86 > as it is an MMU capable hardware > MHD.Tayseer > >> > >> > I would like to disable the Virtual Memory System for an embedded >> > RTAI System, where latency is everything, and task-switching in an >> > MMU-Environment is slow... >> >> I think you have old data; a syscall is 500 cycles nowadays, and a full >> switch isn't much more than that... >> >> >> (but there is no way to run x86 mmuless, the "2.6 can run without mmu" >> is about hardware without an mmu ...) >> >> >> -- >> 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/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
