On 29/08/2014 22:10, j.glisse@xxxxxxxxx wrote: > + * - MMU_MUNMAP: the range is being unmapped (outcome of a munmap syscall or > + * process destruction). However, access is still allowed, up until the > + * invalidate_range_free_pages callback. This also implies that secondary > + * page table can be trimmed, because the address range is no longer valid. I couldn't find the invalidate_range_free_pages callback. Is that a left over from a previous version of the patch? Also, I think that you have to invalidate the secondary PTEs of the range being unmapped immediately, because put_page may be called immediately after the invalidate_range_start returns. Haggai -- 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>