On Wed, 25 Jun 2014 00:16:14 +0400 Konstantin Khlebnikov <koct9i@xxxxxxxxx> wrote: > This patch prints warning (if CONFIG_DEBUG_VM=y) when > memory commitment becomes too negative. > > ... > > --- a/mm/mmap.c > +++ b/mm/mmap.c > @@ -134,6 +134,12 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin) > { > unsigned long free, allowed, reserve; > > +#ifdef CONFIG_DEBUG_VM > + WARN_ONCE(percpu_counter_read(&vm_committed_as) < > + -(s64)vm_committed_as_batch * num_online_cpus(), > + "memory commitment underflow"); > +#endif > + > vm_acct_memory(pages); The changelog doesn't describe the reasons for making the change. I assume this warning will detect the situation which the previous two patches just fixed? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/