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    SubjectRe: [PATCH] Fix mmap_kmem (was: [question] What's the difference between /dev/kmem and /dev/mem)
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    Linus Torvalds <torvalds@osdl.org> writes:
    >
    > I'm actually more inclined to try to deprecate /dev/kmem.. I don't think
    > anybody has ever really used it except for some rootkits.

    I don't think that's true.

    > So I'd be perfectly happy to fix this, but I'd be even happier if we made
    > the whole kmem thing a config variable (maybe even default it to "off").

    Acessing vmalloc in /dev/mem would be pretty awkward. Yes it doesn't
    also work in mmap of /dev/kmem, but at least in read/write.
    There are quite a lot of scripts that use it for kernel debugging
    like dumping variables. And for that you really want to access modules
    and vmalloc. And it's much easier to parse than /proc/kcore

    In fact I have some patches queued to fix it for x86-64 again
    (people who used such scripts on i386 are complaining)

    -Andi
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