Re: [rfc] increase struct page size?!

[William Lee Irwin III]

On Sat, 19 May 2007 11:15:01 -0700 William Lee Irwin III <wli@xxxxxxxxxxxxxx> 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.

On Sat, May 19, 2007 at 03:09:34PM -0700, Andrew Morton wrote:
> 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().

Oh dear, worst-case app behavior. I'm just wrong.


-- wli
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