When I mmap pages via remap_pfn_page method would the physical frames assigned the linear address be contiguous?
remap_pfn_range is just going to established a secondary virtual address mapping for these pages into the caller process' page tables, irrespective of whether these pages have kernel linear address or not.
Yes I got that. Hopefully the secondary virtual address mapping you are referring to would be the process address space mapping. Just for testing and making it act like I have mmap'd system RAM I have assigned kernel linear addresses to by doing a char *ch = (char *)kmap(pgmem = pfn_to_page(vma->vm_pgoff); setting a value "TEST" and reading it in the userspace process after mmap'ing the physical range. Also I can map different process address space to the same physical page frame right?