On 12/10, Linus Torvalds wrote: > > So it looks like __get_user_pages_fast() fails, and keeps failing.
And "again:" does get_user_pages_fast(). And according to this trace get_user_pages_fast() takes mmap_sem and calls __get_user_pages(). But __get_user_pages() should fail even before follow_page_mask() due to fatal_signal_pending(), in this case get_futex_key() should return the error. is_vm_hugetlb_page(vma). So it seems that this is not THP but VM_HUGETLB and follow_hugetlb_page() succeeds every time? Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/