If the system is 32 bit, usually we will have a highmem zone. I find gather_bootmem_prealloc() will free the huge_bootmem_page and then prep the new huge page in CONFIG_HIGHMEM. But alloc_bootmem_huge_page() we will use the beginning of the huge page to store the huge_bootmem_page struct, so how to set huge_bootmem_page->phys? commit(ee8f248d266ec6966c0ce6b7dec24de43dcc1b58) add phys addr to struct huge_bootmem_page Another question, commit(8b89a1169437541a2a9b62c8f7b1a5c0ceb0fbde) update the interface, and the following code actually fix a bug too, right? We should use phys instead of virt when calling free_bootmem_late(), But it has not reported to stable. - free_bootmem_late((unsigned long)m, - sizeof(struct huge_bootmem_page)); + memblock_free_late(__pa(m), + sizeof(struct huge_bootmem_page)); Thanks, Xishi Qiu -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>