compact_init_migrate_pfn 538 include/linux/mmzone.h unsigned long compact_init_migrate_pfn; compact_init_migrate_pfn 346 mm/compaction.c zone->compact_init_migrate_pfn = reset_migrate; compact_init_migrate_pfn 2132 mm/compaction.c if (cc->migrate_pfn <= cc->zone->compact_init_migrate_pfn)