Andrew, here are the patches to always lock the root anon_vma, ported to the latest -mm tree. These patches implement Linus's idea of always locking the root anon_vma and contain all the fixes and improvements suggested by Andrea. This should fix the last bits of the anon_vma locking. v3 is identical to v2, except I gathered up the Acked-by:s that were on list already. Patches 4 and 5 still need some reviewing and acks... -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>