Yet another set of VM questions

["Kirk True" <ktrue@movaris.com>]

Hi all,

    1. Regarding non-contiguous memory allocation, what is the need to have
       *virtually* contiguous but not *physically* contiguous pages?
    2. UtLVMM says that vmalloc is only used in the kernel for storing swap
       information - yet it's used by a bunch of drivers which are 
       considered part of the kernel; is it just semantics?
    3. Is vmalloc called from user-mode ever?
    4. What is the difference between kmalloc, malloc, and vmalloc?
    5. Anonymous memory is memory that is *not* backed by a file, such as
       the stack or heap space, right? And mmap is called when mapping 
       files into memory, right? The why does mmap deal with anonymous
       memory (sorry, I'm totally confused here)?

Thanks,
Kirk


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