On Mon, 6 Sep 2010, KOSAKI Motohiro wrote: > > From: Vasiliy Kulikov <segooon@xxxxxxxxx> > > > > Function check_range may return ERR_PTR(...). Check for it. > > When happen this issue? > > afaik, check_range return error when following condition. > 1) mm->mmap->vm_start argument is incorrect > 2) don't have neigher MPOL_MF_STATS, MPOL_MF_MOVE and MPOL_MF_MOVE_ALL > > I think both case is not happen in real. Am I overlooking anything? > There's no reason not to check the return value of a function when the implementation of either could change at any time. migrate_to_node() is certainly not in any fastpath where we can't sacrifice a branch for more robust code. -- 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>