+ * This is how much memory *in addition to the memory covered up to + * and including _end* we need mapped initially. We need one bit for + * each possible page, but only in low memory, which means + * 2^32/4096/8 = 128K worst case (4G/4G split.) + * + * Modulo rounding, each megabyte assigned here requires a kilobyte of + * memory, which is currently unreclaimed. + * + * This should be a multiple of a page. + */ +#define INIT_MAP_BEYOND_END (128*1024) + +/*
You have dropped the requirement to map all of low memory (the boot allocator is used for instance to construct physical mem mapping). Either you should fix your INIT_MAP_BEYOND_END or make a big comment telling us why it isn't necessary anymore to map low mem.
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