Messages in this thread | | | Date | Sat, 19 May 2007 15:09:34 -0700 | From | Andrew Morton <> | Subject | Re: [rfc] increase struct page size?! |
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On Sat, 19 May 2007 11:15:01 -0700 William Lee Irwin III <wli@holomorphy.com> wrote:
> Much the same holds for the atomic_t's; 32 + PAGE_SHIFT is > 44 bits or more, about as much as is possible, and one reference per > page per page is not even feasible. Full-length atomic_t's are just > not necessary.
You can overflow a page's refcount by mapping it 4G times. That requires 32GB of pagetable memory. It's quite feasible with remap_file_pages().
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