On Wed, Feb 20, 2013 at 8:51 PM, Ric Mason <ric.masonn@xxxxxxxxx> wrote: > On 02/01/2013 02:10 PM, Johannes Weiner wrote: >> >> The fact that mlock calls get_user_pages, and get_user_pages might >> call mlock when expanding a stack looks like a potential recursion. > > Why expand stack need call mlock? I can't find it in the codes, could you > point out to me? Its hidden in find_expand_vma(). Basically if the existing stack is already mlocked, any additional stack expansions get mlocked as well. -- Michel "Walken" Lespinasse A program is never fully debugged until the last user dies. -- 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>