Messages in this thread | | | Date | Thu, 17 Apr 2003 13:45:12 -0700 | From | Andrew Morton <> | Subject | Re: What's the reason that /dev/mem can't map unreserved RAM? |
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Hugh Dickins <hugh@veritas.com> wrote: > > I did start out on eliminating PageReserved a few months ago, > but was persuaded to delay that until 2.7. When that's done, > you will be able to mmap /dev/mem properly.
I think we can almost do it now. Just a few things like get_user_pages(), ptrace and core dumping may need to be taught about VM_RESERVED.
Or we could simply change mmap_mem() to set VM_IO if any of the pages aren't valid. That's probably an accurate reflection of what the app is trying to do, too.
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