On Fri, 16 Jan 2004, Daniel Drake wrote: > Vova wrote: > > Hello All ! > > In fact, Linux use paging memory model, but segment model has some advantages > > such as no need to relocation. Why Linux prefare paging model ? Is it only > > compitability issue ? > > According to a book of mine (Understanding the linux kernel), linux prefers > paging because: > - Memory management is simpler > - Some architectures have limited or no support for segmentation (e.g. RISC) Also: - programs may want segments that are larger than what fits into physical memory - modern CPUs run very slowly when segmentation is enabled (or rather, the segmentation logic is bypassed when all the segments span the magical full 4GB) Rik -- "Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." - Brian W. Kernighan -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
