On Wed, 30 May 2012, kosaki.motohiro@xxxxxxxxx wrote: > refcount will be decreased even though was not increased whenever alloc_page_vma() > is called. As you know, mere mbind(MPOL_MF_MOVE) calls alloc_page_vma(). Most of these issues are about memory migration and shared memory. If we exempt shared memory from memory migration (after all that shared memory has its own distinct memory policies already!) then a lot of these issues wont arise. -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>