[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: MMUless Linux 2.6 for x86

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.
> 
> 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/