On Tue 05-04-16 12:05:47, Sukadev Bhattiprolu wrote: [...] > diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c > index d991b9e..081f679 100644 > --- a/arch/powerpc/mm/hugetlbpage.c > +++ b/arch/powerpc/mm/hugetlbpage.c > @@ -81,6 +81,13 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp, > if (! new) > return -ENOMEM; > > + /* > + * Make sure other cpus find the hugepd set only after a > + * properly initialized page table is visible to them. > + * For more details look for comment in __pte_alloc(). > + */ > + smp_wmb(); > + what is the pairing memory barrier? > spin_lock(&mm->page_table_lock); > #ifdef CONFIG_PPC_FSL_BOOK3E > /* > -- > 1.8.3.1 -- Michal Hocko SUSE Labs -- 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>