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SubjectRe: hash table sizes
William Lee Irwin III <wli@holomorphy.com> wrote:
>
> Speaking of which, no one's bothered fixing the X crashes on i386
> discontigmem. Untested patch below.
>
> ...
> -#define pfn_valid(pfn) ((pfn) < num_physpages)
> +#define pfn_valid(pfn) \
> +({ \
> + unsigned long __pfn__ = pfn; \
> + u8 __nid__ = pfn_to_nid(__pfn__); \
> + pg_data_t *__pgdat__; \
> + __pgdat__ = __nid__ < MAX_NUMNODES ? NODE_DATA(__nid__) : NULL; \
> + __pgdat__ && \
> + __pfn__ >= __pgdat__->node_start_pfn && \
> + __pfn__ - __pgdat__->node_start_pfn \
> + < __pgdat__->node_spanned_pages; \
> +})

Boggle.

Does this evaulate to the same thing on non-discontigmem? (surely no)

Can we please arrange for it to?
-
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