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/
