On 03/03/2016 08:01 AM, Li Zhang wrote:
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -293,13 +293,20 @@ static inline bool update_defer_init(pg_data_t *pgdat,
> unsigned long pfn, unsigned long zone_end,
> unsigned long *nr_initialised)
> {
> + unsigned long max_initialise;
> +
> /* Always populate low zones for address-contrained allocations */
> if (zone_end < pgdat_end_pfn(pgdat))
> return true;
> + /*
> + * Initialise at least 2G of a node but also take into account that
> + * two large system hashes that can take up 1GB for 0.25TB/node.
> + */
The indentation is wrong here.
> + max_initialise = max(2UL << (30 - PAGE_SHIFT),
> + (pgdat->node_spanned_pages >> 8));
>
> - /* Initialise at least 2G of the highest zone */
> (*nr_initialised)++;
> - if (*nr_initialised > (2UL << (30 - PAGE_SHIFT)) &&
> + if ((*nr_initialised > max_initialise) &&
> (pfn & (PAGES_PER_SECTION - 1)) == 0) {
> pgdat->first_deferred_pfn = pfn;
> return false;
>
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