On Wed, Feb 20, 2013 at 8:51 PM, Ric Mason <ric.mas...@gmail.com> 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
