These functions are valid only for kernel memory and not for usre space memory. On Sat, 12 Jun 2004, Tyler wrote: > Hi all, > > I've always thinked that paging or virtual memory was practical to avoid > memory fragmentation. I thinked that you can map contiguous virtual > pages to non contiguous physical page frames. > But let's take a look at the macros __va(x) and __pa(x) : > #define __pa(x) ((unsigned long)x-PAGE_OFFSET) > #define __va(x) ((unsigned long)x+PAGE_OFFSET) > PAGE_OFFSET is a constant. For me, this means that virtual contiguous > adresses have to be mapped to contiguous physical adresses. Am I wrong ?:) > > > -- > 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/
