Hello Joonsoo, 2015-02-16 5:43 GMT+01:00 Joonsoo Kim <[email protected]>: > > Hello, > > Sorry for my mistake. > Problem happens because when we allocate memory through > __get_free_pages(), refcount of each pages is not 1 except > head page. Below modification will fix your problem. Could you > test it, please?
I just tested it, and confirm it fixes the regression. You can add my: Tested-by: Maxime Coquelin <[email protected]> Thanks for the quick fix! Maxime > > Thanks. > > ------------>8------------- > diff --git a/mm/nommu.c b/mm/nommu.c > index 28bd8c4..ff6c1e2 100644 > --- a/mm/nommu.c > +++ b/mm/nommu.c > @@ -1189,11 +1189,9 @@ static int do_mmap_private(struct vm_area_struct *vma, > if (sysctl_nr_trim_pages && total - point >= sysctl_nr_trim_pages) { > total = point; > kdebug("try to alloc exact %lu pages", total); > - base = alloc_pages_exact(len, GFP_KERNEL); > - } else { > - base = (void *)__get_free_pages(GFP_KERNEL, order); > } > > + base = alloc_pages_exact(total << PAGE_SHIFT, GFP_KERNEL); > if (!base) > goto enomem; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
