On Wed, Nov 25, 2020 at 03:42:37PM +0100, David Hildenbrand wrote: > > Now the loop is for interesection of [zone_start_pfn, zone_end_pfn] with > > memblock.memory and for x86 reserved ranges are not in memblock.memory, > > so the memmap for them remains semi-initialized. > > As far as I understood Mel, rounding these ranges up/down to cover full > MAX_ORDER blocks/pageblocks might work. >
Yes, round down the lower end of the hole and round up the higher end to the MAX_ORDER boundary for the purposes of having valid zone/node linkages even if the underlying page is PageReserved. -- Mel Gorman SUSE Labs
