Re: that page count overflow thing

[David Miller <davem@davemloft.net>]

From: William Lee Irwin III <wli@holomorphy.com>
Date: Mon, 21 May 2007 04:37:47 -0700

> This could be awkward with allocation requirements. How about an
> open-addressed hash table? It can be made so large as to never
> need to expand in advance with a very small constant factor space
> overhead.

I was just thinking of a normal hash table with entries that
looked simply like:

struct page_big_count_hash {
       struct page_big_count_hash *next; /* or list_head or hlist_head etc. */
       struct page *key;
       atomic64_t count;
};