> > then, this logic depend on SLAB_DESTROY_BY_RCU, not refcount. > > So, I think we don't need your [1/11] patch. > > > > Am I missing something? > > > > The refcount is still needed. The anon_vma might be valid, but the > refcount is what ensures that the anon_vma is not freed and reused. please please why do we need both mechanism. now cristoph is very busy and I am de fact reviewer of page migration and mempolicy code. I really hope to understand your patch. -- 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>