On 02/11/2016 06:21 AM, Kirill A. Shutemov wrote > We also shouldn't try to mlock() pte-mapped huge pages: pte-mapeed THP > pages are never mlocked. That's kinda subtle. Can you explain more? If we did the following: ptr = mmap(NULL, 512*PAGE_SIZE, ...); mlock(ptr, 512*PAGE_SIZE); fork(); munmap(ptr + 100 * PAGE_SIZE, PAGE_SIZE); I'd expect to get two processes, each mapping the same compound THP, one with a PMD and the other with 511 ptes and one hole. Is there something different that goes on? -- 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>